./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8 --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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- 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-e04fb08 [2022-11-16 12:03:52,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:03:53,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:03:53,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:03:53,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:03:53,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:03:53,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:03:53,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:03:53,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:03:53,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:03:53,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:03:53,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:03:53,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:03:53,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:03:53,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:03:53,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:03:53,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:03:53,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:03:53,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:03:53,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:03:53,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:03:53,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:03:53,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:03:53,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:03:53,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:03:53,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:03:53,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:03:53,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:03:53,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:03:53,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:03:53,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:03:53,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:03:53,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:03:53,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:03:53,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:03:53,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:03:53,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:03:53,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:03:53,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:03:53,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:03:53,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:03:53,100 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:03:53,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:03:53,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:03:53,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:03:53,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:03:53,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:03:53,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:03:53,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:03:53,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:03:53,134 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:03:53,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:03:53,135 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:03:53,135 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:03:53,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:03:53,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:03:53,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:03:53,136 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:03:53,136 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:03:53,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:03:53,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:03:53,137 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:03:53,137 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:03:53,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:03:53,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:03:53,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:03:53,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:03:53,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:03:53,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:03:53,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:03:53,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:03:53,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:03:53,139 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_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2022-11-16 12:03:53,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:03:53,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:03:53,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:03:53,438 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:03:53,439 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:03:53,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-11-16 12:03:53,513 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/297dbaa4c/cb1cc0d5bd4644758f3c84da627247c9/FLAG5db52f166 [2022-11-16 12:03:54,054 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:03:54,057 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-11-16 12:03:54,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/297dbaa4c/cb1cc0d5bd4644758f3c84da627247c9/FLAG5db52f166 [2022-11-16 12:03:54,379 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/297dbaa4c/cb1cc0d5bd4644758f3c84da627247c9 [2022-11-16 12:03:54,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:03:54,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:03:54,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:03:54,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:03:54,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:03:54,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:54" (1/1) ... [2022-11-16 12:03:54,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b9d8b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:54, skipping insertion in model container [2022-11-16 12:03:54,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:54" (1/1) ... [2022-11-16 12:03:54,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:03:54,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:03:54,656 WARN L229 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_8169a86b-faaa-43ba-8c17-77555b85fc40/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-11-16 12:03:54,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:03:54,675 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) [2022-11-16 12:03:54,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@270a820c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:54, skipping insertion in model container [2022-11-16 12:03:54,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:03:54,676 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 12:03:54,678 INFO L158 Benchmark]: Toolchain (without parser) took 291.81ms. Allocated memory is still 140.5MB. Free memory was 103.9MB in the beginning and 117.3MB in the end (delta: -13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:03:54,679 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 140.5MB. Free memory was 121.3MB in the beginning and 121.3MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:03:54,680 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.16ms. Allocated memory is still 140.5MB. Free memory was 103.8MB in the beginning and 117.3MB in the end (delta: -13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:03:54,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 140.5MB. Free memory was 121.3MB in the beginning and 121.3MB in the end (delta: 77.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.16ms. Allocated memory is still 140.5MB. Free memory was 103.8MB in the beginning and 117.3MB in the end (delta: -13.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 170]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8 --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 dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c --- 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-e04fb08 [2022-11-16 12:03:56,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:03:56,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:03:56,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:03:56,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:03:56,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:03:56,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:03:56,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:03:56,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:03:56,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:03:56,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:03:56,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:03:56,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:03:56,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:03:56,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:03:56,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:03:56,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:03:56,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:03:56,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:03:56,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:03:56,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:03:56,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:03:56,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:03:56,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:03:56,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:03:56,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:03:56,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:03:56,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:03:56,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:03:56,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:03:56,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:03:56,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:03:56,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:03:56,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:03:56,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:03:56,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:03:56,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:03:56,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:03:56,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:03:56,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:03:56,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:03:56,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 12:03:56,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:03:56,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:03:56,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:03:56,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:03:56,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:03:56,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:03:56,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:03:56,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:03:56,945 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:03:56,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:03:56,946 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:03:56,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:03:56,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:03:56,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:03:56,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:03:56,948 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:03:56,948 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:03:56,948 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:03:56,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:03:56,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:03:56,949 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:03:56,949 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:03:56,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:03:56,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:03:56,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:03:56,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:03:56,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:03:56,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:03:56,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:03:56,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:03:56,951 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:03:56,952 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:03:56,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:03:56,952 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_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda4e60b50ccb96ce521fa11aa956967863397082d82b1fb589f74967fe28a7c [2022-11-16 12:03:57,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:03:57,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:03:57,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:03:57,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:03:57,363 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:03:57,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-11-16 12:03:57,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/55b0270ab/54731bcac2e242cab344fdf49e91a523/FLAGd625f4641 [2022-11-16 12:03:58,000 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:03:58,001 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2022-11-16 12:03:58,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/55b0270ab/54731bcac2e242cab344fdf49e91a523/FLAGd625f4641 [2022-11-16 12:03:58,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/data/55b0270ab/54731bcac2e242cab344fdf49e91a523 [2022-11-16 12:03:58,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:03:58,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:03:58,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:03:58,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:03:58,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:03:58,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb9b72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58, skipping insertion in model container [2022-11-16 12:03:58,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:03:58,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:03:58,631 WARN L229 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_8169a86b-faaa-43ba-8c17-77555b85fc40/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-11-16 12:03:58,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:03:58,694 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 12:03:58,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:03:58,735 WARN L229 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_8169a86b-faaa-43ba-8c17-77555b85fc40/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-11-16 12:03:58,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:03:58,752 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:03:58,797 WARN L229 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_8169a86b-faaa-43ba-8c17-77555b85fc40/sv-benchmarks/c/weaver/parallel-lamport.wvr.c[4210,4223] [2022-11-16 12:03:58,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:03:58,836 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:03:58,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58 WrapperNode [2022-11-16 12:03:58,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:03:58,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:03:58,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:03:58,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:03:58,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,909 INFO L138 Inliner]: procedures = 27, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 227 [2022-11-16 12:03:58,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:03:58,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:03:58,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:03:58,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:03:58,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:03:58,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:03:58,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:03:58,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:03:58,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (1/1) ... [2022-11-16 12:03:58,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:03:58,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:59,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:03:59,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:03:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:03:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 12:03:59,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:03:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 12:03:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:03:59,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:03:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:03:59,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:03:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:03:59,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:03:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:03:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:03:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:03:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:03:59,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:03:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:03:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 12:03:59,067 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:03:59,231 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:03:59,233 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:03:59,911 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:04:00,038 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:04:00,039 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:04:00,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:04:00 BoogieIcfgContainer [2022-11-16 12:04:00,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:04:00,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:04:00,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:04:00,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:04:00,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:03:58" (1/3) ... [2022-11-16 12:04:00,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5beaa313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:04:00, skipping insertion in model container [2022-11-16 12:04:00,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:58" (2/3) ... [2022-11-16 12:04:00,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5beaa313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:04:00, skipping insertion in model container [2022-11-16 12:04:00,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:04:00" (3/3) ... [2022-11-16 12:04:00,051 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2022-11-16 12:04:00,070 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:04:00,070 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-11-16 12:04:00,071 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:04:00,203 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:04:00,256 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:04:00,272 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 204 transitions, 432 flow [2022-11-16 12:04:00,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 204 transitions, 432 flow [2022-11-16 12:04:00,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 204 transitions, 432 flow [2022-11-16 12:04:00,396 INFO L130 PetriNetUnfolder]: 7/201 cut-off events. [2022-11-16 12:04:00,396 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 12:04:00,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 7/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 200 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 155. Up to 2 conditions per place. [2022-11-16 12:04:00,403 INFO L119 LiptonReduction]: Number of co-enabled transitions 2258 [2022-11-16 12:04:26,520 INFO L134 LiptonReduction]: Checked pairs total: 11070 [2022-11-16 12:04:26,520 INFO L136 LiptonReduction]: Total number of compositions: 204 [2022-11-16 12:04:26,529 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 59 transitions, 142 flow [2022-11-16 12:04:26,712 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3730 states, 3526 states have (on average 3.4330686330119113) internal successors, (12105), 3729 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:26,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:04:26,738 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;@22a8c131, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:04:26,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2022-11-16 12:04:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 3730 states, 3526 states have (on average 3.4330686330119113) internal successors, (12105), 3729 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:04:26,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:26,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:04:26,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 27267, now seen corresponding path program 1 times [2022-11-16 12:04:26,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:26,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887535774] [2022-11-16 12:04:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:26,776 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 [2022-11-16 12:04:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:26,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:26,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:26,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:04:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:27,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:27,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887535774] [2022-11-16 12:04:27,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887535774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:27,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:27,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:27,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934719251] [2022-11-16 12:04:27,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:27,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:27,119 INFO L87 Difference]: Start difference. First operand has 3730 states, 3526 states have (on average 3.4330686330119113) internal successors, (12105), 3729 states have internal predecessors, (12105), 0 states have call successors, (0), 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) [2022-11-16 12:04:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:27,537 INFO L93 Difference]: Finished difference Result 3200 states and 10244 transitions. [2022-11-16 12:04:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:27,540 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 [2022-11-16 12:04:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:27,580 INFO L225 Difference]: With dead ends: 3200 [2022-11-16 12:04:27,581 INFO L226 Difference]: Without dead ends: 3200 [2022-11-16 12:04:27,581 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 [2022-11-16 12:04:27,585 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:27,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:04:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2022-11-16 12:04:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 3198. [2022-11-16 12:04:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3030 states have (on average 3.380858085808581) internal successors, (10244), 3197 states have internal predecessors, (10244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 10244 transitions. [2022-11-16 12:04:27,862 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 10244 transitions. Word has length 2 [2022-11-16 12:04:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:27,863 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 10244 transitions. [2022-11-16 12:04:27,865 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) [2022-11-16 12:04:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 10244 transitions. [2022-11-16 12:04:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:04:27,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:27,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:04:27,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:28,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:28,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:28,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:28,079 INFO L85 PathProgramCache]: Analyzing trace with hash 27142, now seen corresponding path program 1 times [2022-11-16 12:04:28,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:28,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342977761] [2022-11-16 12:04:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:28,080 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 [2022-11-16 12:04:28,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:28,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:28,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:04:28,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:28,275 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:04:28,276 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 [2022-11-16 12:04:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:28,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:28,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:28,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342977761] [2022-11-16 12:04:28,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342977761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:28,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:28,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:28,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293438355] [2022-11-16 12:04:28,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:28,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:28,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:28,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:28,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:28,308 INFO L87 Difference]: Start difference. First operand 3198 states and 10244 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) [2022-11-16 12:04:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:28,667 INFO L93 Difference]: Finished difference Result 3197 states and 10242 transitions. [2022-11-16 12:04:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:28,668 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 [2022-11-16 12:04:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:28,688 INFO L225 Difference]: With dead ends: 3197 [2022-11-16 12:04:28,689 INFO L226 Difference]: Without dead ends: 3197 [2022-11-16 12:04:28,689 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 [2022-11-16 12:04:28,692 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:28,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:04:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2022-11-16 12:04:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3197. [2022-11-16 12:04:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3030 states have (on average 3.38019801980198) internal successors, (10242), 3196 states have internal predecessors, (10242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10242 transitions. [2022-11-16 12:04:28,858 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10242 transitions. Word has length 2 [2022-11-16 12:04:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:28,858 INFO L495 AbstractCegarLoop]: Abstraction has 3197 states and 10242 transitions. [2022-11-16 12:04:28,859 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) [2022-11-16 12:04:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10242 transitions. [2022-11-16 12:04:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:04:28,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:28,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:04:28,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:29,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:29,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash 27143, now seen corresponding path program 1 times [2022-11-16 12:04:29,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:29,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721152428] [2022-11-16 12:04:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:29,073 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 [2022-11-16 12:04:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:29,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:29,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:29,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:04:29,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:29,332 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:29,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:04:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:29,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:29,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:29,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721152428] [2022-11-16 12:04:29,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721152428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:29,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:29,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971061458] [2022-11-16 12:04:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:29,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:29,379 INFO L87 Difference]: Start difference. First operand 3197 states and 10242 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) [2022-11-16 12:04:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:29,747 INFO L93 Difference]: Finished difference Result 3197 states and 10241 transitions. [2022-11-16 12:04:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:29,748 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 [2022-11-16 12:04:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:29,768 INFO L225 Difference]: With dead ends: 3197 [2022-11-16 12:04:29,769 INFO L226 Difference]: Without dead ends: 3197 [2022-11-16 12:04:29,769 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 [2022-11-16 12:04:29,774 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:29,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:04:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2022-11-16 12:04:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3197. [2022-11-16 12:04:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3030 states have (on average 3.37986798679868) internal successors, (10241), 3196 states have internal predecessors, (10241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 10241 transitions. [2022-11-16 12:04:29,915 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 10241 transitions. Word has length 2 [2022-11-16 12:04:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:29,916 INFO L495 AbstractCegarLoop]: Abstraction has 3197 states and 10241 transitions. [2022-11-16 12:04:29,916 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) [2022-11-16 12:04:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 10241 transitions. [2022-11-16 12:04:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:04:29,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:29,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:04:29,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:30,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:30,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:30,135 INFO L85 PathProgramCache]: Analyzing trace with hash 844396, now seen corresponding path program 1 times [2022-11-16 12:04:30,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:30,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992192140] [2022-11-16 12:04:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:30,136 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 [2022-11-16 12:04:30,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:30,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:30,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:04:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:30,345 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-16 12:04:30,346 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 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-16 12:04:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:04:30,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:30,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:30,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992192140] [2022-11-16 12:04:30,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992192140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:30,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:30,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:30,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100174151] [2022-11-16 12:04:30,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:30,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:30,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:30,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:30,467 INFO L87 Difference]: Start difference. First operand 3197 states and 10241 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) [2022-11-16 12:04:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:30,686 INFO L93 Difference]: Finished difference Result 3196 states and 10240 transitions. [2022-11-16 12:04:30,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:30,686 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 [2022-11-16 12:04:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:30,727 INFO L225 Difference]: With dead ends: 3196 [2022-11-16 12:04:30,731 INFO L226 Difference]: Without dead ends: 3196 [2022-11-16 12:04:30,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:30,733 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:30,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-16 12:04:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2022-11-16 12:04:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3196. [2022-11-16 12:04:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3030 states have (on average 3.3795379537953796) internal successors, (10240), 3195 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 10240 transitions. [2022-11-16 12:04:30,879 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 10240 transitions. Word has length 3 [2022-11-16 12:04:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:30,880 INFO L495 AbstractCegarLoop]: Abstraction has 3196 states and 10240 transitions. [2022-11-16 12:04:30,880 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) [2022-11-16 12:04:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 10240 transitions. [2022-11-16 12:04:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:04:30,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:30,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:04:30,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:31,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:31,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash 844397, now seen corresponding path program 1 times [2022-11-16 12:04:31,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:31,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442175273] [2022-11-16 12:04:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:31,093 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 [2022-11-16 12:04:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:31,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:31,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:04:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:31,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:31,383 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-16 12:04:31,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-16 12:04:31,415 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 12:04:31,415 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 [2022-11-16 12:04:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:31,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:31,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442175273] [2022-11-16 12:04:31,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442175273] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:31,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:04:31,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-16 12:04:31,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634333452] [2022-11-16 12:04:31,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:31,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:04:31,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:31,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:04:31,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:04:31,657 INFO L87 Difference]: Start difference. First operand 3196 states and 10240 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) [2022-11-16 12:04:31,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:31,967 INFO L93 Difference]: Finished difference Result 2590 states and 8050 transitions. [2022-11-16 12:04:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:31,968 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 [2022-11-16 12:04:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:31,982 INFO L225 Difference]: With dead ends: 2590 [2022-11-16 12:04:31,983 INFO L226 Difference]: Without dead ends: 2590 [2022-11-16 12:04:31,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:04:31,984 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:31,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:04:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-11-16 12:04:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2590. [2022-11-16 12:04:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2461 states have (on average 3.2710280373831777) internal successors, (8050), 2589 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 8050 transitions. [2022-11-16 12:04:32,094 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 8050 transitions. Word has length 3 [2022-11-16 12:04:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:32,094 INFO L495 AbstractCegarLoop]: Abstraction has 2590 states and 8050 transitions. [2022-11-16 12:04:32,094 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) [2022-11-16 12:04:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 8050 transitions. [2022-11-16 12:04:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:04:32,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:32,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:04:32,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:04:32,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:32,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash 844272, now seen corresponding path program 1 times [2022-11-16 12:04:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098539190] [2022-11-16 12:04:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:32,309 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 [2022-11-16 12:04:32,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:32,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:32,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:32,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:04:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:32,533 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:32,533 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 [2022-11-16 12:04:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:32,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:32,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:32,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098539190] [2022-11-16 12:04:32,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098539190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:32,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:32,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:04:32,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54305640] [2022-11-16 12:04:32,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:32,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:04:32,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:04:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:04:32,901 INFO L87 Difference]: Start difference. First operand 2590 states and 8050 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) [2022-11-16 12:04:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:33,848 INFO L93 Difference]: Finished difference Result 5179 states and 16101 transitions. [2022-11-16 12:04:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:04:33,849 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 [2022-11-16 12:04:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:33,877 INFO L225 Difference]: With dead ends: 5179 [2022-11-16 12:04:33,877 INFO L226 Difference]: Without dead ends: 5179 [2022-11-16 12:04:33,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:04:33,878 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:33,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 9 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:04:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2022-11-16 12:04:33,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 2593. [2022-11-16 12:04:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2464 states have (on average 3.2694805194805197) internal successors, (8056), 2592 states have internal predecessors, (8056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 8056 transitions. [2022-11-16 12:04:34,015 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 8056 transitions. Word has length 3 [2022-11-16 12:04:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:34,017 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 8056 transitions. [2022-11-16 12:04:34,017 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) [2022-11-16 12:04:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 8056 transitions. [2022-11-16 12:04:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:04:34,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:34,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:04:34,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:34,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:34,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:34,231 INFO L85 PathProgramCache]: Analyzing trace with hash 811483411, now seen corresponding path program 1 times [2022-11-16 12:04:34,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:34,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463459553] [2022-11-16 12:04:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:34,232 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 [2022-11-16 12:04:34,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:34,233 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:34,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:04:34,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:34,465 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:04:34,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-16 12:04:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:04:34,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:34,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:34,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463459553] [2022-11-16 12:04:34,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463459553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:34,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:34,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:34,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109280389] [2022-11-16 12:04:34,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:34,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:34,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:34,602 INFO L87 Difference]: Start difference. First operand 2593 states and 8056 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) [2022-11-16 12:04:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:34,764 INFO L93 Difference]: Finished difference Result 2592 states and 8054 transitions. [2022-11-16 12:04:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:34,764 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 [2022-11-16 12:04:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:34,780 INFO L225 Difference]: With dead ends: 2592 [2022-11-16 12:04:34,780 INFO L226 Difference]: Without dead ends: 2592 [2022-11-16 12:04:34,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:34,781 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:34,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 12:04:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-11-16 12:04:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2592. [2022-11-16 12:04:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2463 states have (on average 3.269995939910678) internal successors, (8054), 2591 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 8054 transitions. [2022-11-16 12:04:34,882 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 8054 transitions. Word has length 5 [2022-11-16 12:04:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:34,882 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 8054 transitions. [2022-11-16 12:04:34,883 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) [2022-11-16 12:04:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 8054 transitions. [2022-11-16 12:04:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:04:34,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:34,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:04:34,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:35,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:35,095 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 811483412, now seen corresponding path program 1 times [2022-11-16 12:04:35,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121723256] [2022-11-16 12:04:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:35,096 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 [2022-11-16 12:04:35,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:35,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:35,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:35,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:04:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:35,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:35,348 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 12:04:35,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 12:04:35,364 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 [2022-11-16 12:04:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:35,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:35,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:35,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121723256] [2022-11-16 12:04:35,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121723256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:35,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:35,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:04:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295731191] [2022-11-16 12:04:35,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:35,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:04:35,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:04:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:04:35,925 INFO L87 Difference]: Start difference. First operand 2592 states and 8054 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:36,117 INFO L93 Difference]: Finished difference Result 2596 states and 8060 transitions. [2022-11-16 12:04:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:04:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:04:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:36,132 INFO L225 Difference]: With dead ends: 2596 [2022-11-16 12:04:36,132 INFO L226 Difference]: Without dead ends: 2596 [2022-11-16 12:04:36,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:04:36,133 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:36,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-11-16 12:04:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2022-11-16 12:04:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2594. [2022-11-16 12:04:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2465 states have (on average 3.2685598377281946) internal successors, (8057), 2593 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 8057 transitions. [2022-11-16 12:04:36,206 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 8057 transitions. Word has length 5 [2022-11-16 12:04:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:36,207 INFO L495 AbstractCegarLoop]: Abstraction has 2594 states and 8057 transitions. [2022-11-16 12:04:36,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 8057 transitions. [2022-11-16 12:04:36,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:04:36,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:36,208 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 12:04:36,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-16 12:04:36,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:36,420 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash -615277497, now seen corresponding path program 2 times [2022-11-16 12:04:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:36,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788169056] [2022-11-16 12:04:36,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:04:36,420 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 [2022-11-16 12:04:36,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:36,422 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:36,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:36,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:04:36,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:04:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:36,677 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:36,677 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 [2022-11-16 12:04:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:36,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:37,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788169056] [2022-11-16 12:04:37,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788169056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:37,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:37,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:04:37,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406871251] [2022-11-16 12:04:37,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:37,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:04:37,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:37,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:04:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:04:37,810 INFO L87 Difference]: Start difference. First operand 2594 states and 8057 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) [2022-11-16 12:04:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:44,424 INFO L93 Difference]: Finished difference Result 23276 states and 72406 transitions. [2022-11-16 12:04:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:04:44,425 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 [2022-11-16 12:04:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:44,560 INFO L225 Difference]: With dead ends: 23276 [2022-11-16 12:04:44,560 INFO L226 Difference]: Without dead ends: 23276 [2022-11-16 12:04:44,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:04:44,561 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1104 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:44,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 72 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-16 12:04:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23276 states. [2022-11-16 12:04:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23276 to 2600. [2022-11-16 12:04:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2471 states have (on average 3.265479562929988) internal successors, (8069), 2599 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 8069 transitions. [2022-11-16 12:04:44,919 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 8069 transitions. Word has length 6 [2022-11-16 12:04:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:44,919 INFO L495 AbstractCegarLoop]: Abstraction has 2600 states and 8069 transitions. [2022-11-16 12:04:44,919 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) [2022-11-16 12:04:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 8069 transitions. [2022-11-16 12:04:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:04:44,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:44,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:04:44,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:45,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:45,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -613821841, now seen corresponding path program 1 times [2022-11-16 12:04:45,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:45,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099033628] [2022-11-16 12:04:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:45,134 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 [2022-11-16 12:04:45,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:45,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:45,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:04:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:45,339 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-16 12:04:45,340 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 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-16 12:04:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:04:45,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:45,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:45,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099033628] [2022-11-16 12:04:45,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099033628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:45,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:45,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413130006] [2022-11-16 12:04:45,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:45,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:45,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:45,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:45,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:45,383 INFO L87 Difference]: Start difference. First operand 2600 states and 8069 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:45,574 INFO L93 Difference]: Finished difference Result 2535 states and 7901 transitions. [2022-11-16 12:04:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:04:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:45,586 INFO L225 Difference]: With dead ends: 2535 [2022-11-16 12:04:45,586 INFO L226 Difference]: Without dead ends: 2535 [2022-11-16 12:04:45,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:45,587 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:45,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:04:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2022-11-16 12:04:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2535. [2022-11-16 12:04:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 2421 states have (on average 3.2635274679884345) internal successors, (7901), 2534 states have internal predecessors, (7901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 7901 transitions. [2022-11-16 12:04:45,732 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 7901 transitions. Word has length 6 [2022-11-16 12:04:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:45,732 INFO L495 AbstractCegarLoop]: Abstraction has 2535 states and 7901 transitions. [2022-11-16 12:04:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 7901 transitions. [2022-11-16 12:04:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:04:45,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:45,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:04:45,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:45,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:45,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash -613821840, now seen corresponding path program 1 times [2022-11-16 12:04:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:45,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758057264] [2022-11-16 12:04:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:45,946 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 [2022-11-16 12:04:45,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:45,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:45,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:04:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:46,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:46,204 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 12:04:46,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 12:04:46,224 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 39 treesize of output 37 [2022-11-16 12:04:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:46,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:46,799 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:46,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758057264] [2022-11-16 12:04:46,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758057264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:46,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:46,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:04:46,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717798233] [2022-11-16 12:04:46,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:46,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:04:46,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:04:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:04:46,801 INFO L87 Difference]: Start difference. First operand 2535 states and 7901 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:47,659 INFO L93 Difference]: Finished difference Result 2539 states and 7908 transitions. [2022-11-16 12:04:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:04:47,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:04:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:47,674 INFO L225 Difference]: With dead ends: 2539 [2022-11-16 12:04:47,675 INFO L226 Difference]: Without dead ends: 2539 [2022-11-16 12:04:47,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:04:47,676 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:47,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 23 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 96 Unchecked, 0.6s Time] [2022-11-16 12:04:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2022-11-16 12:04:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2536. [2022-11-16 12:04:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2422 states have (on average 3.2630057803468207) internal successors, (7903), 2535 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 7903 transitions. [2022-11-16 12:04:47,754 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 7903 transitions. Word has length 6 [2022-11-16 12:04:47,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:47,754 INFO L495 AbstractCegarLoop]: Abstraction has 2536 states and 7903 transitions. [2022-11-16 12:04:47,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:47,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 7903 transitions. [2022-11-16 12:04:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:04:47,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:47,755 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-16 12:04:47,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:47,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:47,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1893683212, now seen corresponding path program 2 times [2022-11-16 12:04:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:47,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290848602] [2022-11-16 12:04:47,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:04:47,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:47,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:47,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:48,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:04:48,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:04:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:48,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:48,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:48,233 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:04:48,234 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:04:48,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:04:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:04:48,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:48,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:48,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290848602] [2022-11-16 12:04:48,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290848602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:48,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:48,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:04:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968628751] [2022-11-16 12:04:48,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:48,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:04:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:04:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:04:48,471 INFO L87 Difference]: Start difference. First operand 2536 states and 7903 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) [2022-11-16 12:04:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:48,619 INFO L93 Difference]: Finished difference Result 2535 states and 7901 transitions. [2022-11-16 12:04:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:04:48,619 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 7 [2022-11-16 12:04:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:48,626 INFO L225 Difference]: With dead ends: 2535 [2022-11-16 12:04:48,626 INFO L226 Difference]: Without dead ends: 2535 [2022-11-16 12:04:48,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:04:48,627 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:48,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-11-16 12:04:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2022-11-16 12:04:48,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2535. [2022-11-16 12:04:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 2421 states have (on average 3.2635274679884345) internal successors, (7901), 2534 states have internal predecessors, (7901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 7901 transitions. [2022-11-16 12:04:48,698 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 7901 transitions. Word has length 7 [2022-11-16 12:04:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:48,698 INFO L495 AbstractCegarLoop]: Abstraction has 2535 states and 7901 transitions. [2022-11-16 12:04:48,699 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) [2022-11-16 12:04:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 7901 transitions. [2022-11-16 12:04:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:04:48,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:48,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:48,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:48,916 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1848609739, now seen corresponding path program 1 times [2022-11-16 12:04:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:48,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229679335] [2022-11-16 12:04:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:48,917 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 [2022-11-16 12:04:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:48,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:48,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:49,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:04:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:49,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:49,235 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:04:49,235 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:04:49,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:04:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:49,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:49,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:49,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229679335] [2022-11-16 12:04:49,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229679335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:49,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:49,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:04:49,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894150490] [2022-11-16 12:04:49,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:49,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:04:49,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:04:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:04:49,826 INFO L87 Difference]: Start difference. First operand 2535 states and 7901 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:50,570 INFO L93 Difference]: Finished difference Result 2540 states and 7910 transitions. [2022-11-16 12:04:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:04:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:04:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:50,577 INFO L225 Difference]: With dead ends: 2540 [2022-11-16 12:04:50,577 INFO L226 Difference]: Without dead ends: 2540 [2022-11-16 12:04:50,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:04:50,578 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:50,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 96 Unchecked, 0.6s Time] [2022-11-16 12:04:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-11-16 12:04:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2536. [2022-11-16 12:04:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2422 states have (on average 3.2630057803468207) internal successors, (7903), 2535 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 7903 transitions. [2022-11-16 12:04:50,635 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 7903 transitions. Word has length 7 [2022-11-16 12:04:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:50,635 INFO L495 AbstractCegarLoop]: Abstraction has 2536 states and 7903 transitions. [2022-11-16 12:04:50,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 7903 transitions. [2022-11-16 12:04:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:04:50,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:50,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:50,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:50,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:50,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1848470939, now seen corresponding path program 1 times [2022-11-16 12:04:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548903592] [2022-11-16 12:04:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:50,849 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 [2022-11-16 12:04:50,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:50,850 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:50,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:50,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:04:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:51,118 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:51,118 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 [2022-11-16 12:04:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:51,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:51,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:51,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548903592] [2022-11-16 12:04:51,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548903592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:51,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:51,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:04:51,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405549969] [2022-11-16 12:04:51,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:51,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:04:51,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:04:51,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:04:51,656 INFO L87 Difference]: Start difference. First operand 2536 states and 7903 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:52,374 INFO L93 Difference]: Finished difference Result 5191 states and 16146 transitions. [2022-11-16 12:04:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:04:52,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:04:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:52,389 INFO L225 Difference]: With dead ends: 5191 [2022-11-16 12:04:52,389 INFO L226 Difference]: Without dead ends: 5191 [2022-11-16 12:04:52,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:04:52,390 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 164 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:52,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 16 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 182 Unchecked, 0.6s Time] [2022-11-16 12:04:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2022-11-16 12:04:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 2671. [2022-11-16 12:04:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2561 states have (on average 3.2799687622022646) internal successors, (8400), 2670 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 8400 transitions. [2022-11-16 12:04:52,480 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 8400 transitions. Word has length 7 [2022-11-16 12:04:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:52,481 INFO L495 AbstractCegarLoop]: Abstraction has 2671 states and 8400 transitions. [2022-11-16 12:04:52,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 8400 transitions. [2022-11-16 12:04:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:04:52,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:52,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:52,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:52,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:52,694 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:52,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1848470937, now seen corresponding path program 1 times [2022-11-16 12:04:52,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:52,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049987529] [2022-11-16 12:04:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:52,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:52,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:52,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:52,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:52,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:04:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:52,963 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 12:04:52,963 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 29 [2022-11-16 12:04:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:04:53,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:53,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049987529] [2022-11-16 12:04:53,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049987529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:53,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:53,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075599873] [2022-11-16 12:04:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:53,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:53,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:53,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:53,002 INFO L87 Difference]: Start difference. First operand 2671 states and 8400 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) [2022-11-16 12:04:53,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:53,182 INFO L93 Difference]: Finished difference Result 2545 states and 7929 transitions. [2022-11-16 12:04:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:53,183 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 [2022-11-16 12:04:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:53,190 INFO L225 Difference]: With dead ends: 2545 [2022-11-16 12:04:53,190 INFO L226 Difference]: Without dead ends: 2545 [2022-11-16 12:04:53,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:53,191 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:53,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:04:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2022-11-16 12:04:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2545. [2022-11-16 12:04:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2448 states have (on average 3.238970588235294) internal successors, (7929), 2544 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 7929 transitions. [2022-11-16 12:04:53,253 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 7929 transitions. Word has length 7 [2022-11-16 12:04:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:53,253 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 7929 transitions. [2022-11-16 12:04:53,254 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) [2022-11-16 12:04:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 7929 transitions. [2022-11-16 12:04:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:04:53,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:53,255 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-16 12:04:53,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:53,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:53,467 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1425358736, now seen corresponding path program 2 times [2022-11-16 12:04:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:53,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417545120] [2022-11-16 12:04:53,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:04:53,468 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 [2022-11-16 12:04:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:53,469 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:53,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:53,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:04:53,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:04:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:53,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:53,685 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:04:53,685 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:04:53,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:04:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:04:53,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:53,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:53,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417545120] [2022-11-16 12:04:53,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417545120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:53,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:53,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:04:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333617654] [2022-11-16 12:04:53,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:53,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:04:53,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:04:53,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:04:53,918 INFO L87 Difference]: Start difference. First operand 2545 states and 7929 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:54,054 INFO L93 Difference]: Finished difference Result 2544 states and 7927 transitions. [2022-11-16 12:04:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:04:54,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:04:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:54,063 INFO L225 Difference]: With dead ends: 2544 [2022-11-16 12:04:54,063 INFO L226 Difference]: Without dead ends: 2544 [2022-11-16 12:04:54,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:04:54,064 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:54,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-11-16 12:04:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-11-16 12:04:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2544. [2022-11-16 12:04:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2447 states have (on average 3.239476910502656) internal successors, (7927), 2543 states have internal predecessors, (7927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 7927 transitions. [2022-11-16 12:04:54,127 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 7927 transitions. Word has length 8 [2022-11-16 12:04:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:54,127 INFO L495 AbstractCegarLoop]: Abstraction has 2544 states and 7927 transitions. [2022-11-16 12:04:54,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 7927 transitions. [2022-11-16 12:04:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:04:54,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:54,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:54,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:54,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:54,340 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1472332647, now seen corresponding path program 1 times [2022-11-16 12:04:54,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:54,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588720893] [2022-11-16 12:04:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:54,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:54,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:54,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:54,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:04:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:54,522 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 12:04:54,522 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 [2022-11-16 12:04:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:04:54,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:54,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:54,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588720893] [2022-11-16 12:04:54,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588720893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:54,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:54,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:04:54,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715063207] [2022-11-16 12:04:54,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:54,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:04:54,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:54,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:04:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:04:54,550 INFO L87 Difference]: Start difference. First operand 2544 states and 7927 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) [2022-11-16 12:04:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:54,769 INFO L93 Difference]: Finished difference Result 1793 states and 5437 transitions. [2022-11-16 12:04:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:04:54,770 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 [2022-11-16 12:04:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:54,794 INFO L225 Difference]: With dead ends: 1793 [2022-11-16 12:04:54,794 INFO L226 Difference]: Without dead ends: 1793 [2022-11-16 12:04:54,794 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 [2022-11-16 12:04:54,795 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:54,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 2 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:04:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2022-11-16 12:04:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1793. [2022-11-16 12:04:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1756 states have (on average 3.09624145785877) internal successors, (5437), 1792 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 5437 transitions. [2022-11-16 12:04:54,823 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 5437 transitions. Word has length 8 [2022-11-16 12:04:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:54,824 INFO L495 AbstractCegarLoop]: Abstraction has 1793 states and 5437 transitions. [2022-11-16 12:04:54,824 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) [2022-11-16 12:04:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 5437 transitions. [2022-11-16 12:04:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:04:54,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:54,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:54,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:55,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:55,029 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1472332571, now seen corresponding path program 1 times [2022-11-16 12:04:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:55,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844616917] [2022-11-16 12:04:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:55,031 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 [2022-11-16 12:04:55,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:55,031 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:55,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:04:55,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:55,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:55,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:55,271 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:04:55,271 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:04:55,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:04:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:55,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:55,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844616917] [2022-11-16 12:04:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844616917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:55,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:55,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:04:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279038118] [2022-11-16 12:04:55,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:55,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:04:55,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:04:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:04:55,855 INFO L87 Difference]: Start difference. First operand 1793 states and 5437 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:56,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:56,385 INFO L93 Difference]: Finished difference Result 1798 states and 5445 transitions. [2022-11-16 12:04:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:04:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:04:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:56,391 INFO L225 Difference]: With dead ends: 1798 [2022-11-16 12:04:56,392 INFO L226 Difference]: Without dead ends: 1798 [2022-11-16 12:04:56,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:04:56,393 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:56,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 11 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2022-11-16 12:04:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2022-11-16 12:04:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1793. [2022-11-16 12:04:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1756 states have (on average 3.0956719817767655) internal successors, (5436), 1792 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 5436 transitions. [2022-11-16 12:04:56,434 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 5436 transitions. Word has length 8 [2022-11-16 12:04:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:56,435 INFO L495 AbstractCegarLoop]: Abstraction has 1793 states and 5436 transitions. [2022-11-16 12:04:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 5436 transitions. [2022-11-16 12:04:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:04:56,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:56,436 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:56,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:56,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:56,648 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:56,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1236445973, now seen corresponding path program 2 times [2022-11-16 12:04:56,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:56,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748316511] [2022-11-16 12:04:56,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:04:56,649 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 [2022-11-16 12:04:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:56,651 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:56,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:56,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:04:56,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:56,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:04:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:56,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:56,876 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:04:56,877 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:04:56,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:04:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:04:57,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:57,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:57,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748316511] [2022-11-16 12:04:57,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748316511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:57,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:57,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:04:57,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377812920] [2022-11-16 12:04:57,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:57,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:04:57,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:04:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:04:57,136 INFO L87 Difference]: Start difference. First operand 1793 states and 5436 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) [2022-11-16 12:04:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:57,307 INFO L93 Difference]: Finished difference Result 1792 states and 5434 transitions. [2022-11-16 12:04:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:04:57,308 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 9 [2022-11-16 12:04:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:57,312 INFO L225 Difference]: With dead ends: 1792 [2022-11-16 12:04:57,312 INFO L226 Difference]: Without dead ends: 1792 [2022-11-16 12:04:57,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:04:57,313 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:57,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-16 12:04:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-11-16 12:04:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1792. [2022-11-16 12:04:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1755 states have (on average 3.096296296296296) internal successors, (5434), 1791 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 5434 transitions. [2022-11-16 12:04:57,342 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 5434 transitions. Word has length 9 [2022-11-16 12:04:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:57,342 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 5434 transitions. [2022-11-16 12:04:57,342 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) [2022-11-16 12:04:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 5434 transitions. [2022-11-16 12:04:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:04:57,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:57,343 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:57,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:57,543 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1236584773, now seen corresponding path program 2 times [2022-11-16 12:04:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:57,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922950200] [2022-11-16 12:04:57,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:04:57,544 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 [2022-11-16 12:04:57,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:57,545 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:57,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:57,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:04:57,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:04:57,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:57,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:04:57,774 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 12:04:57,774 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 [2022-11-16 12:04:57,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 242 [2022-11-16 12:04:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:04:57,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:57,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922950200] [2022-11-16 12:04:57,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922950200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:57,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:04:57,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:04:57,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927102670] [2022-11-16 12:04:57,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:57,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:04:57,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:04:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:57,871 INFO L87 Difference]: Start difference. First operand 1792 states and 5434 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) [2022-11-16 12:04:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:58,039 INFO L93 Difference]: Finished difference Result 1692 states and 5154 transitions. [2022-11-16 12:04:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:04:58,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:04:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:58,044 INFO L225 Difference]: With dead ends: 1692 [2022-11-16 12:04:58,044 INFO L226 Difference]: Without dead ends: 1692 [2022-11-16 12:04:58,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:04:58,045 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:58,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:04:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-11-16 12:04:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1576. [2022-11-16 12:04:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1543 states have (on average 3.135450421257291) internal successors, (4838), 1575 states have internal predecessors, (4838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4838 transitions. [2022-11-16 12:04:58,079 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4838 transitions. Word has length 9 [2022-11-16 12:04:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:58,079 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 4838 transitions. [2022-11-16 12:04:58,079 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) [2022-11-16 12:04:58,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4838 transitions. [2022-11-16 12:04:58,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:04:58,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:58,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:58,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:58,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:04:58,292 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:04:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1602324951, now seen corresponding path program 1 times [2022-11-16 12:04:58,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:04:58,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848059958] [2022-11-16 12:04:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:58,293 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 [2022-11-16 12:04:58,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:04:58,294 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:04:58,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:04:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:58,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:04:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:58,530 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:04:58,531 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 [2022-11-16 12:04:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:58,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:59,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:04:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848059958] [2022-11-16 12:04:59,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848059958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:59,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:04:59,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:04:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666437173] [2022-11-16 12:04:59,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:04:59,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:04:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:04:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:04:59,798 INFO L87 Difference]: Start difference. First operand 1576 states and 4838 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:00,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:00,599 INFO L93 Difference]: Finished difference Result 1583 states and 4853 transitions. [2022-11-16 12:05:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:00,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:05:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:00,604 INFO L225 Difference]: With dead ends: 1583 [2022-11-16 12:05:00,604 INFO L226 Difference]: Without dead ends: 1583 [2022-11-16 12:05:00,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:00,605 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:00,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 5 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-11-16 12:05:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-11-16 12:05:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1577. [2022-11-16 12:05:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1544 states have (on average 3.135362694300518) internal successors, (4841), 1576 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 4841 transitions. [2022-11-16 12:05:00,648 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 4841 transitions. Word has length 9 [2022-11-16 12:05:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:00,648 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 4841 transitions. [2022-11-16 12:05:00,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 4841 transitions. [2022-11-16 12:05:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:05:00,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:00,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:00,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:00,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:00,853 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1602325076, now seen corresponding path program 1 times [2022-11-16 12:05:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:00,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400795460] [2022-11-16 12:05:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:00,854 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 [2022-11-16 12:05:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:00,855 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:00,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:05:00,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:01,112 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:05:01,112 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:05:01,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:05:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:01,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:01,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400795460] [2022-11-16 12:05:01,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400795460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:01,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:01,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:01,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247992356] [2022-11-16 12:05:01,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:01,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:01,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:01,755 INFO L87 Difference]: Start difference. First operand 1577 states and 4841 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:01,892 INFO L93 Difference]: Finished difference Result 1585 states and 4855 transitions. [2022-11-16 12:05:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:05:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:05:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:01,897 INFO L225 Difference]: With dead ends: 1585 [2022-11-16 12:05:01,897 INFO L226 Difference]: Without dead ends: 1585 [2022-11-16 12:05:01,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:01,898 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:01,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-11-16 12:05:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-11-16 12:05:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1578. [2022-11-16 12:05:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1545 states have (on average 3.1339805825242717) internal successors, (4842), 1577 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 4842 transitions. [2022-11-16 12:05:01,935 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 4842 transitions. Word has length 9 [2022-11-16 12:05:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:01,935 INFO L495 AbstractCegarLoop]: Abstraction has 1578 states and 4842 transitions. [2022-11-16 12:05:01,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 4842 transitions. [2022-11-16 12:05:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:05:01,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:01,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:01,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:02,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:02,148 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1735908946, now seen corresponding path program 1 times [2022-11-16 12:05:02,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:02,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783724472] [2022-11-16 12:05:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:02,148 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 [2022-11-16 12:05:02,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:02,149 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:02,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:02,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:05:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:02,444 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:02,445 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 [2022-11-16 12:05:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:02,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:03,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:03,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783724472] [2022-11-16 12:05:03,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783724472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:03,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:03,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:03,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637473300] [2022-11-16 12:05:03,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:03,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:03,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:03,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:03,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:03,810 INFO L87 Difference]: Start difference. First operand 1578 states and 4842 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:04,886 INFO L93 Difference]: Finished difference Result 4013 states and 12159 transitions. [2022-11-16 12:05:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:05:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:05:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:04,900 INFO L225 Difference]: With dead ends: 4013 [2022-11-16 12:05:04,900 INFO L226 Difference]: Without dead ends: 4013 [2022-11-16 12:05:04,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:04,901 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 168 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:04,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 12 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 152 Unchecked, 0.5s Time] [2022-11-16 12:05:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2022-11-16 12:05:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 2123. [2022-11-16 12:05:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2090 states have (on average 3.2976076555023925) internal successors, (6892), 2122 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:04,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6892 transitions. [2022-11-16 12:05:04,968 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6892 transitions. Word has length 9 [2022-11-16 12:05:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:04,968 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 6892 transitions. [2022-11-16 12:05:04,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6892 transitions. [2022-11-16 12:05:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:05:04,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:04,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:04,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:05,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:05,182 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:05,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:05,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1735908969, now seen corresponding path program 1 times [2022-11-16 12:05:05,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:05,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245906395] [2022-11-16 12:05:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:05,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:05,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:05,183 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:05,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:05,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:05:05,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:05:05,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:05,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245906395] [2022-11-16 12:05:05,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245906395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:05,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:05,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:05,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199153406] [2022-11-16 12:05:05,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:05,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:05:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:05:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:05,324 INFO L87 Difference]: Start difference. First operand 2123 states and 6892 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:05,542 INFO L93 Difference]: Finished difference Result 1623 states and 4992 transitions. [2022-11-16 12:05:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:05:05,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:05:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:05,545 INFO L225 Difference]: With dead ends: 1623 [2022-11-16 12:05:05,545 INFO L226 Difference]: Without dead ends: 1623 [2022-11-16 12:05:05,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:05:05,546 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:05,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:05:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-11-16 12:05:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1623. [2022-11-16 12:05:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1602 states have (on average 3.1161048689138577) internal successors, (4992), 1622 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4992 transitions. [2022-11-16 12:05:05,572 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4992 transitions. Word has length 9 [2022-11-16 12:05:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:05,572 INFO L495 AbstractCegarLoop]: Abstraction has 1623 states and 4992 transitions. [2022-11-16 12:05:05,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4992 transitions. [2022-11-16 12:05:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:05:05,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:05,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:05,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:05,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:05,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1735908827, now seen corresponding path program 1 times [2022-11-16 12:05:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:05,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737752101] [2022-11-16 12:05:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:05,774 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 [2022-11-16 12:05:05,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:05,775 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:05,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:06,039 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:06,040 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 [2022-11-16 12:05:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:06,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:06,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737752101] [2022-11-16 12:05:06,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737752101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:06,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:06,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:06,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598238806] [2022-11-16 12:05:06,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:06,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:06,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:06,893 INFO L87 Difference]: Start difference. First operand 1623 states and 4992 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:07,631 INFO L93 Difference]: Finished difference Result 1629 states and 5006 transitions. [2022-11-16 12:05:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:07,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:05:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:07,636 INFO L225 Difference]: With dead ends: 1629 [2022-11-16 12:05:07,636 INFO L226 Difference]: Without dead ends: 1629 [2022-11-16 12:05:07,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:07,637 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:07,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-16 12:05:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-11-16 12:05:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1623. [2022-11-16 12:05:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1602 states have (on average 3.1154806491885143) internal successors, (4991), 1622 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4991 transitions. [2022-11-16 12:05:07,660 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4991 transitions. Word has length 9 [2022-11-16 12:05:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:07,660 INFO L495 AbstractCegarLoop]: Abstraction has 1623 states and 4991 transitions. [2022-11-16 12:05:07,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4991 transitions. [2022-11-16 12:05:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:05:07,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:07,661 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:07,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-16 12:05:07,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:07,871 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -324886011, now seen corresponding path program 2 times [2022-11-16 12:05:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455305415] [2022-11-16 12:05:07,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:07,872 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 [2022-11-16 12:05:07,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:07,873 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:07,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:07,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:05:07,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:07,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:05:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:08,121 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 12:05:08,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 12:05:08,141 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 39 treesize of output 37 [2022-11-16 12:05:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:05:08,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:08,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:08,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455305415] [2022-11-16 12:05:08,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455305415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:08,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:08,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:08,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867762405] [2022-11-16 12:05:08,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:08,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:08,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:08,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:08,418 INFO L87 Difference]: Start difference. First operand 1623 states and 4991 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) [2022-11-16 12:05:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:08,553 INFO L93 Difference]: Finished difference Result 1622 states and 4989 transitions. [2022-11-16 12:05:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:05:08,553 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 10 [2022-11-16 12:05:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:08,556 INFO L225 Difference]: With dead ends: 1622 [2022-11-16 12:05:08,557 INFO L226 Difference]: Without dead ends: 1622 [2022-11-16 12:05:08,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:08,557 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:08,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-16 12:05:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-11-16 12:05:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1622. [2022-11-16 12:05:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1601 states have (on average 3.1161773891317925) internal successors, (4989), 1621 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 4989 transitions. [2022-11-16 12:05:08,584 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 4989 transitions. Word has length 10 [2022-11-16 12:05:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:08,584 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 4989 transitions. [2022-11-16 12:05:08,584 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) [2022-11-16 12:05:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 4989 transitions. [2022-11-16 12:05:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:05:08,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:08,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:08,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:08,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:08,785 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1867529600, now seen corresponding path program 1 times [2022-11-16 12:05:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:08,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905019002] [2022-11-16 12:05:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:08,786 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 [2022-11-16 12:05:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:08,787 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:08,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:09,057 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:09,057 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 [2022-11-16 12:05:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:09,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:09,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905019002] [2022-11-16 12:05:09,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905019002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:09,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:09,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:09,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993704988] [2022-11-16 12:05:09,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:09,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:09,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:09,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:09,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:09,962 INFO L87 Difference]: Start difference. First operand 1622 states and 4989 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:10,719 INFO L93 Difference]: Finished difference Result 1632 states and 5008 transitions. [2022-11-16 12:05:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 [2022-11-16 12:05:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:10,724 INFO L225 Difference]: With dead ends: 1632 [2022-11-16 12:05:10,724 INFO L226 Difference]: Without dead ends: 1632 [2022-11-16 12:05:10,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:10,724 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:10,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 105 Unchecked, 0.5s Time] [2022-11-16 12:05:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-16 12:05:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1621. [2022-11-16 12:05:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1600 states have (on average 3.116875) internal successors, (4987), 1620 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4987 transitions. [2022-11-16 12:05:10,761 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4987 transitions. Word has length 10 [2022-11-16 12:05:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:10,761 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 4987 transitions. [2022-11-16 12:05:10,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4987 transitions. [2022-11-16 12:05:10,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:05:10,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:10,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:10,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:10,974 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1788649161, now seen corresponding path program 1 times [2022-11-16 12:05:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628707304] [2022-11-16 12:05:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:10,975 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 [2022-11-16 12:05:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:10,976 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:10,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:11,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:11,250 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:11,250 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 [2022-11-16 12:05:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:11,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:12,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628707304] [2022-11-16 12:05:12,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628707304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:12,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:12,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:12,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949955670] [2022-11-16 12:05:12,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:12,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:12,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:12,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:12,104 INFO L87 Difference]: Start difference. First operand 1621 states and 4987 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:12,902 INFO L93 Difference]: Finished difference Result 1632 states and 5015 transitions. [2022-11-16 12:05:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:12,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 [2022-11-16 12:05:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:12,906 INFO L225 Difference]: With dead ends: 1632 [2022-11-16 12:05:12,907 INFO L226 Difference]: Without dead ends: 1632 [2022-11-16 12:05:12,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:12,907 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:12,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:05:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-16 12:05:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1621. [2022-11-16 12:05:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1600 states have (on average 3.11625) internal successors, (4986), 1620 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:12,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4986 transitions. [2022-11-16 12:05:12,934 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4986 transitions. Word has length 10 [2022-11-16 12:05:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:12,934 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 4986 transitions. [2022-11-16 12:05:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4986 transitions. [2022-11-16 12:05:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:05:12,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:12,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:12,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:13,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:13,148 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2023371276, now seen corresponding path program 1 times [2022-11-16 12:05:13,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:13,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584222867] [2022-11-16 12:05:13,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:13,149 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 [2022-11-16 12:05:13,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:13,150 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:13,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:13,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:13,427 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:13,427 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 [2022-11-16 12:05:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:13,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:14,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584222867] [2022-11-16 12:05:14,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584222867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:14,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:14,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614050660] [2022-11-16 12:05:14,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:14,317 INFO L87 Difference]: Start difference. First operand 1621 states and 4986 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:14,911 INFO L93 Difference]: Finished difference Result 1630 states and 5010 transitions. [2022-11-16 12:05:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:14,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 [2022-11-16 12:05:14,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:14,915 INFO L225 Difference]: With dead ends: 1630 [2022-11-16 12:05:14,916 INFO L226 Difference]: Without dead ends: 1630 [2022-11-16 12:05:14,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:14,917 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:14,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-11-16 12:05:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-11-16 12:05:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1621. [2022-11-16 12:05:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1600 states have (on average 3.115625) internal successors, (4985), 1620 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4985 transitions. [2022-11-16 12:05:14,963 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4985 transitions. Word has length 10 [2022-11-16 12:05:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:14,964 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 4985 transitions. [2022-11-16 12:05:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4985 transitions. [2022-11-16 12:05:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:05:14,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:14,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:14,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-16 12:05:15,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:15,165 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2021396235, now seen corresponding path program 1 times [2022-11-16 12:05:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:15,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175683691] [2022-11-16 12:05:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:15,166 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 [2022-11-16 12:05:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:15,167 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:15,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:15,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:15,465 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:15,465 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 [2022-11-16 12:05:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:15,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:16,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:16,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175683691] [2022-11-16 12:05:16,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175683691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:16,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:16,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027215944] [2022-11-16 12:05:16,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:16,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:16,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:16,344 INFO L87 Difference]: Start difference. First operand 1621 states and 4985 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:17,202 INFO L93 Difference]: Finished difference Result 1628 states and 5002 transitions. [2022-11-16 12:05:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:17,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 [2022-11-16 12:05:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:17,208 INFO L225 Difference]: With dead ends: 1628 [2022-11-16 12:05:17,208 INFO L226 Difference]: Without dead ends: 1628 [2022-11-16 12:05:17,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:17,209 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:17,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-16 12:05:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2022-11-16 12:05:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1621. [2022-11-16 12:05:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1600 states have (on average 3.115) internal successors, (4984), 1620 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4984 transitions. [2022-11-16 12:05:17,242 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4984 transitions. Word has length 10 [2022-11-16 12:05:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:17,242 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 4984 transitions. [2022-11-16 12:05:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2022-11-16 12:05:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4984 transitions. [2022-11-16 12:05:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:17,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:17,243 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:17,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:17,443 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1481537353, now seen corresponding path program 2 times [2022-11-16 12:05:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:17,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674589303] [2022-11-16 12:05:17,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:17,446 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 [2022-11-16 12:05:17,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:17,447 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:17,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:17,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:05:17,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:17,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:05:17,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:17,713 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:17,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:05:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:05:17,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:17,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674589303] [2022-11-16 12:05:17,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674589303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:17,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:17,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:17,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071887095] [2022-11-16 12:05:17,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:17,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:17,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:17,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:17,919 INFO L87 Difference]: Start difference. First operand 1621 states and 4984 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:18,152 INFO L93 Difference]: Finished difference Result 1620 states and 4981 transitions. [2022-11-16 12:05:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:05:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:18,156 INFO L225 Difference]: With dead ends: 1620 [2022-11-16 12:05:18,156 INFO L226 Difference]: Without dead ends: 1620 [2022-11-16 12:05:18,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:18,157 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:18,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 12:05:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2022-11-16 12:05:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1620. [2022-11-16 12:05:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1599 states have (on average 3.1150719199499686) internal successors, (4981), 1619 states have internal predecessors, (4981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 4981 transitions. [2022-11-16 12:05:18,192 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 4981 transitions. Word has length 11 [2022-11-16 12:05:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:18,193 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 4981 transitions. [2022-11-16 12:05:18,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 4981 transitions. [2022-11-16 12:05:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:18,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:18,194 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:18,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:18,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:18,405 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:18,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1481537228, now seen corresponding path program 2 times [2022-11-16 12:05:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:18,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208813917] [2022-11-16 12:05:18,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:18,406 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 [2022-11-16 12:05:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:18,407 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:18,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:18,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:05:18,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:18,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:05:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:18,663 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 12:05:18,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 12:05:18,678 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 [2022-11-16 12:05:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:05:18,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:18,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:18,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208813917] [2022-11-16 12:05:18,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208813917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:18,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:18,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:18,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477573393] [2022-11-16 12:05:18,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:18,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:18,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:18,942 INFO L87 Difference]: Start difference. First operand 1620 states and 4981 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:19,085 INFO L93 Difference]: Finished difference Result 1617 states and 4976 transitions. [2022-11-16 12:05:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:05:19,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:19,089 INFO L225 Difference]: With dead ends: 1617 [2022-11-16 12:05:19,089 INFO L226 Difference]: Without dead ends: 1617 [2022-11-16 12:05:19,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:19,090 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:19,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-16 12:05:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-11-16 12:05:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1617. [2022-11-16 12:05:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1597 states have (on average 3.1158422041327487) internal successors, (4976), 1616 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 4976 transitions. [2022-11-16 12:05:19,123 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 4976 transitions. Word has length 11 [2022-11-16 12:05:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:19,123 INFO L495 AbstractCegarLoop]: Abstraction has 1617 states and 4976 transitions. [2022-11-16 12:05:19,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 4976 transitions. [2022-11-16 12:05:19,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:19,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:19,124 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:19,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:19,325 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1347953358, now seen corresponding path program 2 times [2022-11-16 12:05:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:19,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672948242] [2022-11-16 12:05:19,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:19,326 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 [2022-11-16 12:05:19,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:19,327 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:19,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:19,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:05:19,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:05:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:19,607 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:19,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:05:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:05:19,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:19,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:19,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672948242] [2022-11-16 12:05:19,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672948242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:19,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:19,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:19,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195553621] [2022-11-16 12:05:19,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:19,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:19,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:19,742 INFO L87 Difference]: Start difference. First operand 1617 states and 4976 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:19,987 INFO L93 Difference]: Finished difference Result 1385 states and 4225 transitions. [2022-11-16 12:05:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:05:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:19,990 INFO L225 Difference]: With dead ends: 1385 [2022-11-16 12:05:19,990 INFO L226 Difference]: Without dead ends: 1385 [2022-11-16 12:05:19,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:19,991 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:19,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:05:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-11-16 12:05:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 955. [2022-11-16 12:05:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 941 states have (on average 2.871413390010627) internal successors, (2702), 954 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2702 transitions. [2022-11-16 12:05:20,006 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2702 transitions. Word has length 11 [2022-11-16 12:05:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:20,006 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 2702 transitions. [2022-11-16 12:05:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2702 transitions. [2022-11-16 12:05:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:20,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:20,007 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:20,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:20,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:20,207 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:20,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1347953477, now seen corresponding path program 2 times [2022-11-16 12:05:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:20,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398023422] [2022-11-16 12:05:20,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:20,208 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 [2022-11-16 12:05:20,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:20,209 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:20,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:20,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:05:20,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:05:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:20,493 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:20,493 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 [2022-11-16 12:05:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:05:20,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:20,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:20,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398023422] [2022-11-16 12:05:20,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398023422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:20,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:05:20,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:05:20,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696965820] [2022-11-16 12:05:20,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:20,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:05:20,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:05:20,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:05:20,691 INFO L87 Difference]: Start difference. First operand 955 states and 2702 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:20,883 INFO L93 Difference]: Finished difference Result 954 states and 2698 transitions. [2022-11-16 12:05:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:05:20,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:20,885 INFO L225 Difference]: With dead ends: 954 [2022-11-16 12:05:20,885 INFO L226 Difference]: Without dead ends: 954 [2022-11-16 12:05:20,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:05:20,886 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:20,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:05:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-16 12:05:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 954. [2022-11-16 12:05:20,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 940 states have (on average 2.870212765957447) internal successors, (2698), 953 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 2698 transitions. [2022-11-16 12:05:20,903 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 2698 transitions. Word has length 11 [2022-11-16 12:05:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:20,903 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 2698 transitions. [2022-11-16 12:05:20,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 2698 transitions. [2022-11-16 12:05:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:20,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:20,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:20,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:05:21,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:21,111 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:21,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:21,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2059035471, now seen corresponding path program 1 times [2022-11-16 12:05:21,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:21,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792811088] [2022-11-16 12:05:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:21,112 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 [2022-11-16 12:05:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:21,113 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:21,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:05:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:05:21,404 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:05:21,404 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:05:21,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:05:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:21,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:22,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:22,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792811088] [2022-11-16 12:05:22,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792811088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:22,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:22,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658042424] [2022-11-16 12:05:22,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:22,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:22,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:22,040 INFO L87 Difference]: Start difference. First operand 954 states and 2698 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:22,766 INFO L93 Difference]: Finished difference Result 964 states and 2717 transitions. [2022-11-16 12:05:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:05:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:22,768 INFO L225 Difference]: With dead ends: 964 [2022-11-16 12:05:22,768 INFO L226 Difference]: Without dead ends: 964 [2022-11-16 12:05:22,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:22,769 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:22,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 14 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-16 12:05:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-11-16 12:05:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 956. [2022-11-16 12:05:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 942 states have (on average 2.8683651804670913) internal successors, (2702), 955 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2702 transitions. [2022-11-16 12:05:22,782 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2702 transitions. Word has length 11 [2022-11-16 12:05:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:22,782 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 2702 transitions. [2022-11-16 12:05:22,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2702 transitions. [2022-11-16 12:05:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:22,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:22,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:22,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:22,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:22,985 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2058843334, now seen corresponding path program 1 times [2022-11-16 12:05:22,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:22,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253223967] [2022-11-16 12:05:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:22,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:22,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:22,987 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:22,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:23,276 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:23,276 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 [2022-11-16 12:05:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:23,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:24,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253223967] [2022-11-16 12:05:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253223967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:24,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:24,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504908583] [2022-11-16 12:05:24,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:24,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:24,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:24,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:24,376 INFO L87 Difference]: Start difference. First operand 956 states and 2702 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:25,039 INFO L93 Difference]: Finished difference Result 975 states and 2747 transitions. [2022-11-16 12:05:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:25,042 INFO L225 Difference]: With dead ends: 975 [2022-11-16 12:05:25,042 INFO L226 Difference]: Without dead ends: 975 [2022-11-16 12:05:25,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:25,043 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:25,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-16 12:05:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-16 12:05:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 959. [2022-11-16 12:05:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 945 states have (on average 2.8687830687830687) internal successors, (2711), 958 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2711 transitions. [2022-11-16 12:05:25,056 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2711 transitions. Word has length 11 [2022-11-16 12:05:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:25,057 INFO L495 AbstractCegarLoop]: Abstraction has 959 states and 2711 transitions. [2022-11-16 12:05:25,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2711 transitions. [2022-11-16 12:05:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:25,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:25,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:25,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-16 12:05:25,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:25,258 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1872127876, now seen corresponding path program 1 times [2022-11-16 12:05:25,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:25,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463281122] [2022-11-16 12:05:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:25,259 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 [2022-11-16 12:05:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:25,260 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:25,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:25,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:25,565 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 [2022-11-16 12:05:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:25,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:26,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463281122] [2022-11-16 12:05:26,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463281122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:26,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:26,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103141856] [2022-11-16 12:05:26,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:26,502 INFO L87 Difference]: Start difference. First operand 959 states and 2711 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:27,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:27,074 INFO L93 Difference]: Finished difference Result 977 states and 2761 transitions. [2022-11-16 12:05:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:27,077 INFO L225 Difference]: With dead ends: 977 [2022-11-16 12:05:27,077 INFO L226 Difference]: Without dead ends: 977 [2022-11-16 12:05:27,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:27,078 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:27,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-11-16 12:05:27,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-11-16 12:05:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 961. [2022-11-16 12:05:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 947 states have (on average 2.870116156282999) internal successors, (2718), 960 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 2718 transitions. [2022-11-16 12:05:27,092 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 2718 transitions. Word has length 11 [2022-11-16 12:05:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:27,092 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 2718 transitions. [2022-11-16 12:05:27,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 2718 transitions. [2022-11-16 12:05:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:27,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:27,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:27,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-16 12:05:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:27,294 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash 384480792, now seen corresponding path program 1 times [2022-11-16 12:05:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230715935] [2022-11-16 12:05:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:27,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:27,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:27,296 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:27,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:27,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:27,594 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:27,595 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 [2022-11-16 12:05:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:27,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:28,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:28,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230715935] [2022-11-16 12:05:28,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230715935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:28,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:28,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:28,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534386743] [2022-11-16 12:05:28,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:28,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:28,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:28,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:28,494 INFO L87 Difference]: Start difference. First operand 961 states and 2718 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:29,297 INFO L93 Difference]: Finished difference Result 981 states and 2777 transitions. [2022-11-16 12:05:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:29,300 INFO L225 Difference]: With dead ends: 981 [2022-11-16 12:05:29,300 INFO L226 Difference]: Without dead ends: 981 [2022-11-16 12:05:29,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:29,300 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:29,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-16 12:05:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-16 12:05:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 964. [2022-11-16 12:05:29,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 950 states have (on average 2.871578947368421) internal successors, (2728), 963 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2728 transitions. [2022-11-16 12:05:29,333 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2728 transitions. Word has length 11 [2022-11-16 12:05:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:29,334 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 2728 transitions. [2022-11-16 12:05:29,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2728 transitions. [2022-11-16 12:05:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:29,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:29,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:29,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-16 12:05:29,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:29,543 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash 386455833, now seen corresponding path program 1 times [2022-11-16 12:05:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305202394] [2022-11-16 12:05:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:29,544 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 [2022-11-16 12:05:29,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:29,545 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:29,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:29,854 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:29,854 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 [2022-11-16 12:05:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:30,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:31,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:31,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305202394] [2022-11-16 12:05:31,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305202394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:31,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:31,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:31,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582664191] [2022-11-16 12:05:31,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:31,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:31,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:31,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:31,014 INFO L87 Difference]: Start difference. First operand 964 states and 2728 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:31,452 INFO L93 Difference]: Finished difference Result 978 states and 2766 transitions. [2022-11-16 12:05:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:05:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:31,455 INFO L225 Difference]: With dead ends: 978 [2022-11-16 12:05:31,455 INFO L226 Difference]: Without dead ends: 978 [2022-11-16 12:05:31,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:05:31,456 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:31,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 12:05:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-11-16 12:05:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 965. [2022-11-16 12:05:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 951 states have (on average 2.871713985278654) internal successors, (2731), 964 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2731 transitions. [2022-11-16 12:05:31,471 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2731 transitions. Word has length 11 [2022-11-16 12:05:31,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:31,471 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 2731 transitions. [2022-11-16 12:05:31,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2731 transitions. [2022-11-16 12:05:31,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:31,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:31,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:31,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:31,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:31,675 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1698072483, now seen corresponding path program 1 times [2022-11-16 12:05:31,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:31,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42030976] [2022-11-16 12:05:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:31,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:31,678 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:31,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:31,987 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:31,987 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 [2022-11-16 12:05:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:32,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:32,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42030976] [2022-11-16 12:05:32,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42030976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:32,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:32,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:32,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463038324] [2022-11-16 12:05:32,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:32,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:32,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:32,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:32,859 INFO L87 Difference]: Start difference. First operand 965 states and 2731 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:33,554 INFO L93 Difference]: Finished difference Result 976 states and 2760 transitions. [2022-11-16 12:05:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:33,556 INFO L225 Difference]: With dead ends: 976 [2022-11-16 12:05:33,556 INFO L226 Difference]: Without dead ends: 976 [2022-11-16 12:05:33,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:33,557 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:33,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-11-16 12:05:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-11-16 12:05:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 968. [2022-11-16 12:05:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 954 states have (on average 2.8721174004192873) internal successors, (2740), 967 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 2740 transitions. [2022-11-16 12:05:33,569 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 2740 transitions. Word has length 11 [2022-11-16 12:05:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:33,569 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 2740 transitions. [2022-11-16 12:05:33,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 2740 transitions. [2022-11-16 12:05:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:33,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:33,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:33,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-16 12:05:33,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:33,771 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1698238356, now seen corresponding path program 1 times [2022-11-16 12:05:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:33,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485737963] [2022-11-16 12:05:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:33,772 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 [2022-11-16 12:05:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:33,773 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:33,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:33,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:34,086 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:34,086 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 [2022-11-16 12:05:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:34,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:35,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:35,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485737963] [2022-11-16 12:05:35,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485737963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:35,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:35,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827438961] [2022-11-16 12:05:35,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:35,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:35,003 INFO L87 Difference]: Start difference. First operand 968 states and 2740 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:35,827 INFO L93 Difference]: Finished difference Result 982 states and 2782 transitions. [2022-11-16 12:05:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:35,830 INFO L225 Difference]: With dead ends: 982 [2022-11-16 12:05:35,830 INFO L226 Difference]: Without dead ends: 982 [2022-11-16 12:05:35,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:35,831 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:35,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-11-16 12:05:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-16 12:05:35,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 970. [2022-11-16 12:05:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 956 states have (on average 2.8734309623430963) internal successors, (2747), 969 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2747 transitions. [2022-11-16 12:05:35,844 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2747 transitions. Word has length 11 [2022-11-16 12:05:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:35,845 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 2747 transitions. [2022-11-16 12:05:35,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2747 transitions. [2022-11-16 12:05:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:05:35,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:35,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:35,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-16 12:05:36,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:36,046 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1700004860, now seen corresponding path program 1 times [2022-11-16 12:05:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510646788] [2022-11-16 12:05:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:36,047 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 [2022-11-16 12:05:36,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:36,048 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:36,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:36,373 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:36,374 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 [2022-11-16 12:05:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:36,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:37,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:37,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510646788] [2022-11-16 12:05:37,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510646788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:37,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:37,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:05:37,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024689303] [2022-11-16 12:05:37,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:37,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:05:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:37,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:05:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:05:37,377 INFO L87 Difference]: Start difference. First operand 970 states and 2747 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:37,863 INFO L93 Difference]: Finished difference Result 982 states and 2781 transitions. [2022-11-16 12:05:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:05:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:05:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:37,865 INFO L225 Difference]: With dead ends: 982 [2022-11-16 12:05:37,865 INFO L226 Difference]: Without dead ends: 982 [2022-11-16 12:05:37,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:05:37,865 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:37,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-11-16 12:05:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-16 12:05:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 971. [2022-11-16 12:05:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 957 states have (on average 2.8735632183908044) internal successors, (2750), 970 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2750 transitions. [2022-11-16 12:05:37,877 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2750 transitions. Word has length 11 [2022-11-16 12:05:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:37,877 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 2750 transitions. [2022-11-16 12:05:37,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 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) [2022-11-16 12:05:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2750 transitions. [2022-11-16 12:05:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:05:37,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:37,878 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 12:05:37,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-16 12:05:38,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:05:38,079 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:05:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1460898727, now seen corresponding path program 3 times [2022-11-16 12:05:38,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:05:38,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597821275] [2022-11-16 12:05:38,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:05:38,080 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 [2022-11-16 12:05:38,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:05:38,080 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:05:38,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:05:38,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:05:38,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:38,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:05:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:38,471 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:05:38,471 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 [2022-11-16 12:05:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:39,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:42,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:05:42,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597821275] [2022-11-16 12:05:42,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597821275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:42,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:05:42,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 12:05:42,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453331436] [2022-11-16 12:05:42,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:42,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:05:42,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:05:42,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:05:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:05:42,636 INFO L87 Difference]: Start difference. First operand 971 states and 2750 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) [2022-11-16 12:06:10,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:10,372 INFO L93 Difference]: Finished difference Result 19321 states and 55010 transitions. [2022-11-16 12:06:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:06:10,373 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 [2022-11-16 12:06:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:10,421 INFO L225 Difference]: With dead ends: 19321 [2022-11-16 12:06:10,421 INFO L226 Difference]: Without dead ends: 19321 [2022-11-16 12:06:10,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:06:10,422 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 5110 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 4116 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5110 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 4138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:10,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5110 Valid, 240 Invalid, 4138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4116 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-11-16 12:06:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2022-11-16 12:06:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 983. [2022-11-16 12:06:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 969 states have (on average 2.8627450980392157) internal successors, (2774), 982 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 2774 transitions. [2022-11-16 12:06:10,620 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 2774 transitions. Word has length 12 [2022-11-16 12:06:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:10,620 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 2774 transitions. [2022-11-16 12:06:10,620 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) [2022-11-16 12:06:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 2774 transitions. [2022-11-16 12:06:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:10,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:10,621 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:10,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:10,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:10,822 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1316986784, now seen corresponding path program 2 times [2022-11-16 12:06:10,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:10,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884603222] [2022-11-16 12:06:10,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:10,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:10,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:10,824 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:10,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:10,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:10,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:10,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:11,112 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:11,112 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 [2022-11-16 12:06:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:11,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:11,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:11,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884603222] [2022-11-16 12:06:11,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884603222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:11,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:11,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:11,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828857074] [2022-11-16 12:06:11,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:11,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:11,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:11,335 INFO L87 Difference]: Start difference. First operand 983 states and 2774 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) [2022-11-16 12:06:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:11,557 INFO L93 Difference]: Finished difference Result 982 states and 2772 transitions. [2022-11-16 12:06:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:11,558 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 12 [2022-11-16 12:06:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:11,560 INFO L225 Difference]: With dead ends: 982 [2022-11-16 12:06:11,560 INFO L226 Difference]: Without dead ends: 982 [2022-11-16 12:06:11,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:11,561 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:11,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 12:06:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-16 12:06:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2022-11-16 12:06:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 968 states have (on average 2.8636363636363638) internal successors, (2772), 981 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2772 transitions. [2022-11-16 12:06:11,574 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2772 transitions. Word has length 12 [2022-11-16 12:06:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:11,574 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 2772 transitions. [2022-11-16 12:06:11,574 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) [2022-11-16 12:06:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2772 transitions. [2022-11-16 12:06:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:11,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:11,575 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:11,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:06:11,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:11,775 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1395867223, now seen corresponding path program 2 times [2022-11-16 12:06:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:11,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182889293] [2022-11-16 12:06:11,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:11,776 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 [2022-11-16 12:06:11,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:11,777 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:11,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:11,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:11,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:11,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:12,077 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:12,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:06:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:12,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:12,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:12,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182889293] [2022-11-16 12:06:12,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182889293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:12,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:12,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:12,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831135498] [2022-11-16 12:06:12,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:12,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:12,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:12,293 INFO L87 Difference]: Start difference. First operand 982 states and 2772 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) [2022-11-16 12:06:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:12,491 INFO L93 Difference]: Finished difference Result 981 states and 2768 transitions. [2022-11-16 12:06:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:12,492 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 12 [2022-11-16 12:06:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:12,494 INFO L225 Difference]: With dead ends: 981 [2022-11-16 12:06:12,494 INFO L226 Difference]: Without dead ends: 981 [2022-11-16 12:06:12,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:12,495 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:12,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:06:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-11-16 12:06:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 981. [2022-11-16 12:06:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 967 states have (on average 2.8624612202688726) internal successors, (2768), 980 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2768 transitions. [2022-11-16 12:06:12,512 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2768 transitions. Word has length 12 [2022-11-16 12:06:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:12,513 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 2768 transitions. [2022-11-16 12:06:12,513 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) [2022-11-16 12:06:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2768 transitions. [2022-11-16 12:06:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:12,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:12,514 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:12,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-16 12:06:12,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:12,715 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1161145108, now seen corresponding path program 2 times [2022-11-16 12:06:12,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:12,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343731972] [2022-11-16 12:06:12,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:12,716 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 [2022-11-16 12:06:12,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:12,717 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:12,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:12,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:12,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:13,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:13,006 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 [2022-11-16 12:06:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:13,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:13,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343731972] [2022-11-16 12:06:13,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343731972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:13,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:13,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:13,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140579095] [2022-11-16 12:06:13,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:13,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:13,216 INFO L87 Difference]: Start difference. First operand 981 states and 2768 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) [2022-11-16 12:06:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:13,408 INFO L93 Difference]: Finished difference Result 980 states and 2764 transitions. [2022-11-16 12:06:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:13,409 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 12 [2022-11-16 12:06:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:13,411 INFO L225 Difference]: With dead ends: 980 [2022-11-16 12:06:13,411 INFO L226 Difference]: Without dead ends: 980 [2022-11-16 12:06:13,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:13,411 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:13,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:06:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-11-16 12:06:13,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2022-11-16 12:06:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 966 states have (on average 2.8612836438923397) internal successors, (2764), 979 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2764 transitions. [2022-11-16 12:06:13,424 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2764 transitions. Word has length 12 [2022-11-16 12:06:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:13,425 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 2764 transitions. [2022-11-16 12:06:13,425 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) [2022-11-16 12:06:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2764 transitions. [2022-11-16 12:06:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:13,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:13,426 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:13,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:13,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:13,626 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:13,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1163120149, now seen corresponding path program 2 times [2022-11-16 12:06:13,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:13,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394104215] [2022-11-16 12:06:13,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:13,627 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 [2022-11-16 12:06:13,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:13,628 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:13,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:13,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:13,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:13,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:13,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:13,958 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:13,958 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 [2022-11-16 12:06:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:14,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:14,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:14,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394104215] [2022-11-16 12:06:14,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394104215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:14,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:14,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87412667] [2022-11-16 12:06:14,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:14,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:14,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:14,188 INFO L87 Difference]: Start difference. First operand 980 states and 2764 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) [2022-11-16 12:06:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:14,413 INFO L93 Difference]: Finished difference Result 979 states and 2761 transitions. [2022-11-16 12:06:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:14,414 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 12 [2022-11-16 12:06:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:14,417 INFO L225 Difference]: With dead ends: 979 [2022-11-16 12:06:14,417 INFO L226 Difference]: Without dead ends: 979 [2022-11-16 12:06:14,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:14,418 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:14,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:06:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-11-16 12:06:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 979. [2022-11-16 12:06:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 965 states have (on average 2.861139896373057) internal successors, (2761), 978 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 2761 transitions. [2022-11-16 12:06:14,437 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 2761 transitions. Word has length 12 [2022-11-16 12:06:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:14,437 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 2761 transitions. [2022-11-16 12:06:14,437 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) [2022-11-16 12:06:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 2761 transitions. [2022-11-16 12:06:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:14,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:14,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:14,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:06:14,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:14,650 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:14,650 INFO L85 PathProgramCache]: Analyzing trace with hash 594404515, now seen corresponding path program 1 times [2022-11-16 12:06:14,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:14,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119571012] [2022-11-16 12:06:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:14,651 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 [2022-11-16 12:06:14,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:14,652 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:14,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:14,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:14,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:14,955 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:06:14,955 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:06:14,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:06:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:15,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:15,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:15,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119571012] [2022-11-16 12:06:15,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119571012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:15,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:15,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:15,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212311771] [2022-11-16 12:06:15,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:15,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:15,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:15,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:15,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:15,625 INFO L87 Difference]: Start difference. First operand 979 states and 2761 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:16,120 INFO L93 Difference]: Finished difference Result 989 states and 2780 transitions. [2022-11-16 12:06:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:16,123 INFO L225 Difference]: With dead ends: 989 [2022-11-16 12:06:16,123 INFO L226 Difference]: Without dead ends: 989 [2022-11-16 12:06:16,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:16,123 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:16,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 16 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-16 12:06:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-11-16 12:06:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 980. [2022-11-16 12:06:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 966 states have (on average 2.860248447204969) internal successors, (2763), 979 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2763 transitions. [2022-11-16 12:06:16,136 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2763 transitions. Word has length 12 [2022-11-16 12:06:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:16,136 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 2763 transitions. [2022-11-16 12:06:16,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2763 transitions. [2022-11-16 12:06:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:16,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:16,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:16,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-16 12:06:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:16,337 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash 600367891, now seen corresponding path program 1 times [2022-11-16 12:06:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:16,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498797085] [2022-11-16 12:06:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:16,338 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 [2022-11-16 12:06:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:16,339 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:16,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:16,658 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:16,659 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 [2022-11-16 12:06:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:16,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:17,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:17,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498797085] [2022-11-16 12:06:17,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498797085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:17,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:17,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:17,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96122706] [2022-11-16 12:06:17,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:17,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:17,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:17,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:17,577 INFO L87 Difference]: Start difference. First operand 980 states and 2763 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:18,284 INFO L93 Difference]: Finished difference Result 1004 states and 2823 transitions. [2022-11-16 12:06:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:18,287 INFO L225 Difference]: With dead ends: 1004 [2022-11-16 12:06:18,287 INFO L226 Difference]: Without dead ends: 1004 [2022-11-16 12:06:18,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:18,287 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:18,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-11-16 12:06:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-11-16 12:06:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 983. [2022-11-16 12:06:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 969 states have (on average 2.8606811145510838) internal successors, (2772), 982 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 2772 transitions. [2022-11-16 12:06:18,301 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 2772 transitions. Word has length 12 [2022-11-16 12:06:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:18,301 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 2772 transitions. [2022-11-16 12:06:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 2772 transitions. [2022-11-16 12:06:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:18,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:18,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:18,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:18,503 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:18,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash 600370092, now seen corresponding path program 1 times [2022-11-16 12:06:18,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820704537] [2022-11-16 12:06:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:18,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:18,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:18,505 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:18,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:06:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:18,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:18,816 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:18,817 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 [2022-11-16 12:06:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:19,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:19,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:19,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820704537] [2022-11-16 12:06:19,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820704537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:19,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:19,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:19,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741636852] [2022-11-16 12:06:19,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:19,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:19,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:19,788 INFO L87 Difference]: Start difference. First operand 983 states and 2772 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:20,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:20,542 INFO L93 Difference]: Finished difference Result 1006 states and 2829 transitions. [2022-11-16 12:06:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:20,544 INFO L225 Difference]: With dead ends: 1006 [2022-11-16 12:06:20,544 INFO L226 Difference]: Without dead ends: 1006 [2022-11-16 12:06:20,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:20,545 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:20,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 12:06:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-16 12:06:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 985. [2022-11-16 12:06:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 971 states have (on average 2.8609680741503603) internal successors, (2778), 984 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2778 transitions. [2022-11-16 12:06:20,558 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2778 transitions. Word has length 12 [2022-11-16 12:06:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:20,558 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 2778 transitions. [2022-11-16 12:06:20,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2778 transitions. [2022-11-16 12:06:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:20,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:20,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:20,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:06:20,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:20,763 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash 780355884, now seen corresponding path program 1 times [2022-11-16 12:06:20,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:20,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572043748] [2022-11-16 12:06:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:20,764 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 [2022-11-16 12:06:20,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:20,765 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:20,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 12:06:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:20,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:21,102 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:21,102 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 [2022-11-16 12:06:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:21,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:22,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572043748] [2022-11-16 12:06:22,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572043748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:22,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:22,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:22,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701836078] [2022-11-16 12:06:22,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:22,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:22,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:22,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:22,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:22,068 INFO L87 Difference]: Start difference. First operand 985 states and 2778 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:22,900 INFO L93 Difference]: Finished difference Result 1007 states and 2839 transitions. [2022-11-16 12:06:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:22,903 INFO L225 Difference]: With dead ends: 1007 [2022-11-16 12:06:22,903 INFO L226 Difference]: Without dead ends: 1007 [2022-11-16 12:06:22,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:22,904 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:22,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-11-16 12:06:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-11-16 12:06:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 986. [2022-11-16 12:06:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 972 states have (on average 2.8621399176954734) internal successors, (2782), 985 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2782 transitions. [2022-11-16 12:06:22,917 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2782 transitions. Word has length 12 [2022-11-16 12:06:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:22,917 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 2782 transitions. [2022-11-16 12:06:22,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2782 transitions. [2022-11-16 12:06:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:22,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:22,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:22,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:23,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:23,119 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:23,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2091607923, now seen corresponding path program 1 times [2022-11-16 12:06:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:23,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595725574] [2022-11-16 12:06:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:23,120 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 [2022-11-16 12:06:23,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:23,121 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:23,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-16 12:06:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:23,442 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:23,442 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 [2022-11-16 12:06:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:23,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:24,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:24,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595725574] [2022-11-16 12:06:24,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595725574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:24,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:24,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:24,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71558638] [2022-11-16 12:06:24,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:24,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:24,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:24,582 INFO L87 Difference]: Start difference. First operand 986 states and 2782 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:25,222 INFO L93 Difference]: Finished difference Result 1013 states and 2862 transitions. [2022-11-16 12:06:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:25,225 INFO L225 Difference]: With dead ends: 1013 [2022-11-16 12:06:25,225 INFO L226 Difference]: Without dead ends: 1013 [2022-11-16 12:06:25,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:25,226 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:25,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-16 12:06:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-11-16 12:06:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 988. [2022-11-16 12:06:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 974 states have (on average 2.8634496919917862) internal successors, (2789), 987 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2789 transitions. [2022-11-16 12:06:25,240 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2789 transitions. Word has length 12 [2022-11-16 12:06:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:25,240 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 2789 transitions. [2022-11-16 12:06:25,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2789 transitions. [2022-11-16 12:06:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:25,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:25,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:25,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:25,453 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2093582964, now seen corresponding path program 1 times [2022-11-16 12:06:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:25,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157928233] [2022-11-16 12:06:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:25,454 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 [2022-11-16 12:06:25,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:25,455 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:25,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 12:06:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:25,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:25,802 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:25,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:06:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:26,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:26,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157928233] [2022-11-16 12:06:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157928233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:26,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:26,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:26,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837273710] [2022-11-16 12:06:26,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:26,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:26,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:26,714 INFO L87 Difference]: Start difference. First operand 988 states and 2789 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:27,340 INFO L93 Difference]: Finished difference Result 1008 states and 2844 transitions. [2022-11-16 12:06:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:27,343 INFO L225 Difference]: With dead ends: 1008 [2022-11-16 12:06:27,343 INFO L226 Difference]: Without dead ends: 1008 [2022-11-16 12:06:27,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:27,343 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:27,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-11-16 12:06:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-11-16 12:06:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 989. [2022-11-16 12:06:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 975 states have (on average 2.8635897435897437) internal successors, (2792), 988 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2792 transitions. [2022-11-16 12:06:27,356 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2792 transitions. Word has length 12 [2022-11-16 12:06:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:27,356 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 2792 transitions. [2022-11-16 12:06:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2792 transitions. [2022-11-16 12:06:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:27,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:27,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:27,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:27,569 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash -967924737, now seen corresponding path program 1 times [2022-11-16 12:06:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:27,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124836686] [2022-11-16 12:06:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:27,570 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 [2022-11-16 12:06:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:27,571 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:27,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 12:06:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:06:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:06:27,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:27,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124836686] [2022-11-16 12:06:27,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124836686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:27,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:27,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183575353] [2022-11-16 12:06:27,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:27,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:27,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:27,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:27,750 INFO L87 Difference]: Start difference. First operand 989 states and 2792 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:06:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:28,007 INFO L93 Difference]: Finished difference Result 989 states and 2784 transitions. [2022-11-16 12:06:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:06:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:28,010 INFO L225 Difference]: With dead ends: 989 [2022-11-16 12:06:28,010 INFO L226 Difference]: Without dead ends: 989 [2022-11-16 12:06:28,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:28,010 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:28,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:06:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-11-16 12:06:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 989. [2022-11-16 12:06:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 975 states have (on average 2.855384615384615) internal successors, (2784), 988 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2784 transitions. [2022-11-16 12:06:28,022 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2784 transitions. Word has length 12 [2022-11-16 12:06:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:28,022 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 2784 transitions. [2022-11-16 12:06:28,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:06:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2784 transitions. [2022-11-16 12:06:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:28,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:28,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:28,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:28,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:28,223 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash -967758864, now seen corresponding path program 1 times [2022-11-16 12:06:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:28,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870733454] [2022-11-16 12:06:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:28,224 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 [2022-11-16 12:06:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:28,225 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:28,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-16 12:06:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:28,559 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:28,559 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 [2022-11-16 12:06:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:28,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:29,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870733454] [2022-11-16 12:06:29,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870733454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:29,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:29,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315473700] [2022-11-16 12:06:29,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:29,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:29,832 INFO L87 Difference]: Start difference. First operand 989 states and 2784 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:30,470 INFO L93 Difference]: Finished difference Result 1015 states and 2857 transitions. [2022-11-16 12:06:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:30,473 INFO L225 Difference]: With dead ends: 1015 [2022-11-16 12:06:30,473 INFO L226 Difference]: Without dead ends: 1015 [2022-11-16 12:06:30,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:30,473 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:30,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-11-16 12:06:30,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-11-16 12:06:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 992. [2022-11-16 12:06:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 978 states have (on average 2.8537832310838445) internal successors, (2791), 991 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2791 transitions. [2022-11-16 12:06:30,486 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2791 transitions. Word has length 12 [2022-11-16 12:06:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:30,486 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 2791 transitions. [2022-11-16 12:06:30,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2791 transitions. [2022-11-16 12:06:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:30,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:30,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:30,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:30,688 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -965992360, now seen corresponding path program 1 times [2022-11-16 12:06:30,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:30,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423287611] [2022-11-16 12:06:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:30,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:30,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:30,690 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:30,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 12:06:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:30,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:30,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:31,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:31,008 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 [2022-11-16 12:06:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:31,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:31,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:31,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423287611] [2022-11-16 12:06:31,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423287611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:31,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:31,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:31,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987809950] [2022-11-16 12:06:31,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:31,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:31,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:31,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:31,914 INFO L87 Difference]: Start difference. First operand 992 states and 2791 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:32,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:32,545 INFO L93 Difference]: Finished difference Result 1014 states and 2855 transitions. [2022-11-16 12:06:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:32,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:32,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:32,548 INFO L225 Difference]: With dead ends: 1014 [2022-11-16 12:06:32,548 INFO L226 Difference]: Without dead ends: 1014 [2022-11-16 12:06:32,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:32,548 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:32,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-11-16 12:06:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-11-16 12:06:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 993. [2022-11-16 12:06:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 979 states have (on average 2.853932584269663) internal successors, (2794), 992 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2794 transitions. [2022-11-16 12:06:32,563 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2794 transitions. Word has length 12 [2022-11-16 12:06:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:32,563 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 2794 transitions. [2022-11-16 12:06:32,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2794 transitions. [2022-11-16 12:06:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:32,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:32,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:32,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:32,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:32,765 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1100638825, now seen corresponding path program 2 times [2022-11-16 12:06:32,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:32,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017565642] [2022-11-16 12:06:32,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:32,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:32,766 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:32,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-16 12:06:32,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:32,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:33,097 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:33,098 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 [2022-11-16 12:06:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:06:33,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:33,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:33,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017565642] [2022-11-16 12:06:33,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017565642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:33,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:33,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821347421] [2022-11-16 12:06:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:33,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:33,385 INFO L87 Difference]: Start difference. First operand 993 states and 2794 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:06:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:33,613 INFO L93 Difference]: Finished difference Result 991 states and 2788 transitions. [2022-11-16 12:06:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:06:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:33,615 INFO L225 Difference]: With dead ends: 991 [2022-11-16 12:06:33,616 INFO L226 Difference]: Without dead ends: 991 [2022-11-16 12:06:33,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:33,616 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:33,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 12:06:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-11-16 12:06:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 989. [2022-11-16 12:06:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 975 states have (on average 2.8533333333333335) internal successors, (2782), 988 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2782 transitions. [2022-11-16 12:06:33,631 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2782 transitions. Word has length 12 [2022-11-16 12:06:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:33,631 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 2782 transitions. [2022-11-16 12:06:33,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:06:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2782 transitions. [2022-11-16 12:06:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:33,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:33,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:33,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-16 12:06:33,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:33,832 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1100642917, now seen corresponding path program 1 times [2022-11-16 12:06:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:33,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222785807] [2022-11-16 12:06:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:33,833 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 [2022-11-16 12:06:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:33,835 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:33,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 12:06:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:34,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:34,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:34,199 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 [2022-11-16 12:06:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:34,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:35,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:35,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222785807] [2022-11-16 12:06:35,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222785807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:35,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:35,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:35,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652570061] [2022-11-16 12:06:35,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:35,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:35,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:35,253 INFO L87 Difference]: Start difference. First operand 989 states and 2782 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:35,944 INFO L93 Difference]: Finished difference Result 1006 states and 2829 transitions. [2022-11-16 12:06:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:35,947 INFO L225 Difference]: With dead ends: 1006 [2022-11-16 12:06:35,947 INFO L226 Difference]: Without dead ends: 1006 [2022-11-16 12:06:35,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:35,948 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:35,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-11-16 12:06:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-16 12:06:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 993. [2022-11-16 12:06:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 979 states have (on average 2.853932584269663) internal successors, (2794), 992 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2794 transitions. [2022-11-16 12:06:35,971 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2794 transitions. Word has length 12 [2022-11-16 12:06:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:35,971 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 2794 transitions. [2022-11-16 12:06:35,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2794 transitions. [2022-11-16 12:06:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:35,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:35,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:35,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:36,186 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1100802528, now seen corresponding path program 1 times [2022-11-16 12:06:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:36,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774601768] [2022-11-16 12:06:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:36,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:36,188 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:36,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 12:06:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:36,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:36,584 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:36,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:06:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:36,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:37,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774601768] [2022-11-16 12:06:37,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774601768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:37,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:37,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690920910] [2022-11-16 12:06:37,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:37,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:37,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:37,594 INFO L87 Difference]: Start difference. First operand 993 states and 2794 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:38,570 INFO L93 Difference]: Finished difference Result 1009 states and 2843 transitions. [2022-11-16 12:06:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:38,575 INFO L225 Difference]: With dead ends: 1009 [2022-11-16 12:06:38,575 INFO L226 Difference]: Without dead ends: 1009 [2022-11-16 12:06:38,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:38,576 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:38,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 69 Unchecked, 0.4s Time] [2022-11-16 12:06:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-11-16 12:06:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 994. [2022-11-16 12:06:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 980 states have (on average 2.8551020408163263) internal successors, (2798), 993 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2798 transitions. [2022-11-16 12:06:38,592 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2798 transitions. Word has length 12 [2022-11-16 12:06:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:38,593 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 2798 transitions. [2022-11-16 12:06:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2798 transitions. [2022-11-16 12:06:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:06:38,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:38,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:38,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-16 12:06:38,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:38,794 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:38,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1105786460, now seen corresponding path program 1 times [2022-11-16 12:06:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:38,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631851847] [2022-11-16 12:06:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:38,795 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 [2022-11-16 12:06:38,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:38,799 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:38,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 12:06:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:38,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:39,181 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:39,181 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 [2022-11-16 12:06:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:39,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:40,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:40,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631851847] [2022-11-16 12:06:40,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631851847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:40,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:40,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:40,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015400862] [2022-11-16 12:06:40,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:40,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:40,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:40,324 INFO L87 Difference]: Start difference. First operand 994 states and 2798 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:41,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:41,213 INFO L93 Difference]: Finished difference Result 1010 states and 2845 transitions. [2022-11-16 12:06:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:41,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 [2022-11-16 12:06:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:41,216 INFO L225 Difference]: With dead ends: 1010 [2022-11-16 12:06:41,216 INFO L226 Difference]: Without dead ends: 1010 [2022-11-16 12:06:41,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:41,217 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:41,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-11-16 12:06:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-11-16 12:06:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 995. [2022-11-16 12:06:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 981 states have (on average 2.855249745158002) internal successors, (2801), 994 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2801 transitions. [2022-11-16 12:06:41,232 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2801 transitions. Word has length 12 [2022-11-16 12:06:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:41,233 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 2801 transitions. [2022-11-16 12:06:41,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2022-11-16 12:06:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2801 transitions. [2022-11-16 12:06:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:41,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:41,234 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:41,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-16 12:06:41,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:41,434 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2123275375, now seen corresponding path program 2 times [2022-11-16 12:06:41,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864655616] [2022-11-16 12:06:41,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:41,435 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 [2022-11-16 12:06:41,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:41,436 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:41,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 12:06:41,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:41,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:41,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:06:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:41,755 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:06:41,756 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:06:41,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:06:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:42,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:42,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864655616] [2022-11-16 12:06:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864655616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:42,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:42,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:42,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549220893] [2022-11-16 12:06:42,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:42,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:42,081 INFO L87 Difference]: Start difference. First operand 995 states and 2801 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:42,329 INFO L93 Difference]: Finished difference Result 994 states and 2799 transitions. [2022-11-16 12:06:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:42,332 INFO L225 Difference]: With dead ends: 994 [2022-11-16 12:06:42,333 INFO L226 Difference]: Without dead ends: 994 [2022-11-16 12:06:42,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:42,333 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:42,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:06:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-11-16 12:06:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 994. [2022-11-16 12:06:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 980 states have (on average 2.8561224489795918) internal successors, (2799), 993 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2799 transitions. [2022-11-16 12:06:42,350 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2799 transitions. Word has length 13 [2022-11-16 12:06:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:42,350 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 2799 transitions. [2022-11-16 12:06:42,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2799 transitions. [2022-11-16 12:06:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:42,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:42,351 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:42,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-16 12:06:42,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:42,552 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2123083238, now seen corresponding path program 2 times [2022-11-16 12:06:42,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:42,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608364882] [2022-11-16 12:06:42,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:42,553 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 [2022-11-16 12:06:42,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:42,554 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:42,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 12:06:42,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:42,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:42,917 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:42,917 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 [2022-11-16 12:06:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:43,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:43,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:43,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608364882] [2022-11-16 12:06:43,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608364882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:43,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:43,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493567535] [2022-11-16 12:06:43,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:43,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:43,148 INFO L87 Difference]: Start difference. First operand 994 states and 2799 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:43,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:43,385 INFO L93 Difference]: Finished difference Result 993 states and 2796 transitions. [2022-11-16 12:06:43,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:43,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:43,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:43,388 INFO L225 Difference]: With dead ends: 993 [2022-11-16 12:06:43,388 INFO L226 Difference]: Without dead ends: 993 [2022-11-16 12:06:43,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:43,388 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:43,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 12:06:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-16 12:06:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2022-11-16 12:06:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 979 states have (on average 2.8559754851889685) internal successors, (2796), 992 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2796 transitions. [2022-11-16 12:06:43,404 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2796 transitions. Word has length 13 [2022-11-16 12:06:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:43,404 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 2796 transitions. [2022-11-16 12:06:43,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:43,404 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2796 transitions. [2022-11-16 12:06:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:43,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:43,405 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:43,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-16 12:06:43,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:43,605 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1936367780, now seen corresponding path program 2 times [2022-11-16 12:06:43,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:43,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105112797] [2022-11-16 12:06:43,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:43,606 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 [2022-11-16 12:06:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:43,607 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:43,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 12:06:43,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:43,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:43,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:43,950 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:43,950 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 [2022-11-16 12:06:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:44,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:44,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:44,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105112797] [2022-11-16 12:06:44,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105112797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:44,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:44,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067407162] [2022-11-16 12:06:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:44,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:44,207 INFO L87 Difference]: Start difference. First operand 993 states and 2796 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:44,421 INFO L93 Difference]: Finished difference Result 992 states and 2792 transitions. [2022-11-16 12:06:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:44,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:44,424 INFO L225 Difference]: With dead ends: 992 [2022-11-16 12:06:44,424 INFO L226 Difference]: Without dead ends: 992 [2022-11-16 12:06:44,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:44,424 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:44,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:06:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-11-16 12:06:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2022-11-16 12:06:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 978 states have (on average 2.85480572597137) internal successors, (2792), 991 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2792 transitions. [2022-11-16 12:06:44,437 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2792 transitions. Word has length 13 [2022-11-16 12:06:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:44,437 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 2792 transitions. [2022-11-16 12:06:44,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2792 transitions. [2022-11-16 12:06:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:44,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:44,438 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:44,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-16 12:06:44,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:44,646 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:44,646 INFO L85 PathProgramCache]: Analyzing trace with hash 320240888, now seen corresponding path program 2 times [2022-11-16 12:06:44,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:44,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858239471] [2022-11-16 12:06:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:44,647 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 [2022-11-16 12:06:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:44,649 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:44,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 12:06:44,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:44,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:44,984 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:44,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:06:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:45,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:45,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:45,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858239471] [2022-11-16 12:06:45,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858239471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:45,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:45,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:45,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516667749] [2022-11-16 12:06:45,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:45,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:45,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:45,226 INFO L87 Difference]: Start difference. First operand 992 states and 2792 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:45,442 INFO L93 Difference]: Finished difference Result 991 states and 2788 transitions. [2022-11-16 12:06:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:45,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:45,444 INFO L225 Difference]: With dead ends: 991 [2022-11-16 12:06:45,444 INFO L226 Difference]: Without dead ends: 991 [2022-11-16 12:06:45,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:45,445 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:45,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:06:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-11-16 12:06:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2022-11-16 12:06:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 977 states have (on average 2.8536335721596724) internal successors, (2788), 990 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2788 transitions. [2022-11-16 12:06:45,484 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2788 transitions. Word has length 13 [2022-11-16 12:06:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:45,484 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 2788 transitions. [2022-11-16 12:06:45,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2788 transitions. [2022-11-16 12:06:45,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:45,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:45,486 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:45,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:45,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:45,698 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash 322215929, now seen corresponding path program 2 times [2022-11-16 12:06:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:45,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533623] [2022-11-16 12:06:45,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:45,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:45,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:45,700 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:45,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 12:06:45,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:45,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:46,043 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:46,043 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 [2022-11-16 12:06:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:46,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:46,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:46,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533623] [2022-11-16 12:06:46,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:46,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:46,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385061309] [2022-11-16 12:06:46,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:46,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:46,300 INFO L87 Difference]: Start difference. First operand 991 states and 2788 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:46,511 INFO L93 Difference]: Finished difference Result 990 states and 2785 transitions. [2022-11-16 12:06:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:46,514 INFO L225 Difference]: With dead ends: 990 [2022-11-16 12:06:46,514 INFO L226 Difference]: Without dead ends: 990 [2022-11-16 12:06:46,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:46,515 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:46,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:06:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-16 12:06:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2022-11-16 12:06:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 976 states have (on average 2.853483606557377) internal successors, (2785), 989 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 2785 transitions. [2022-11-16 12:06:46,529 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 2785 transitions. Word has length 13 [2022-11-16 12:06:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:46,530 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 2785 transitions. [2022-11-16 12:06:46,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 2785 transitions. [2022-11-16 12:06:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:46,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:46,530 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:46,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-16 12:06:46,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:46,731 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1633998452, now seen corresponding path program 2 times [2022-11-16 12:06:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107080864] [2022-11-16 12:06:46,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:46,732 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 [2022-11-16 12:06:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:46,733 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:46,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 12:06:46,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:46,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:47,073 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:47,074 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 [2022-11-16 12:06:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:47,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:47,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:47,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107080864] [2022-11-16 12:06:47,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107080864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:47,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:47,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:47,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993530671] [2022-11-16 12:06:47,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:47,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:47,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:47,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:47,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:47,309 INFO L87 Difference]: Start difference. First operand 990 states and 2785 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:47,509 INFO L93 Difference]: Finished difference Result 989 states and 2781 transitions. [2022-11-16 12:06:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:47,511 INFO L225 Difference]: With dead ends: 989 [2022-11-16 12:06:47,511 INFO L226 Difference]: Without dead ends: 989 [2022-11-16 12:06:47,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:47,511 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:47,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:06:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-11-16 12:06:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 989. [2022-11-16 12:06:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 975 states have (on average 2.852307692307692) internal successors, (2781), 988 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2781 transitions. [2022-11-16 12:06:47,525 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2781 transitions. Word has length 13 [2022-11-16 12:06:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:47,526 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 2781 transitions. [2022-11-16 12:06:47,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2781 transitions. [2022-11-16 12:06:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:47,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:47,526 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:47,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-16 12:06:47,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:47,727 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:47,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:47,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1635764956, now seen corresponding path program 2 times [2022-11-16 12:06:47,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:47,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757897843] [2022-11-16 12:06:47,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:47,728 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 [2022-11-16 12:06:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:47,729 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:47,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 12:06:47,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:47,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:06:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:48,060 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:48,060 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 [2022-11-16 12:06:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:48,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:48,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757897843] [2022-11-16 12:06:48,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757897843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:48,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:48,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428805419] [2022-11-16 12:06:48,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:48,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:48,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:48,304 INFO L87 Difference]: Start difference. First operand 989 states and 2781 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:48,529 INFO L93 Difference]: Finished difference Result 988 states and 2778 transitions. [2022-11-16 12:06:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:48,531 INFO L225 Difference]: With dead ends: 988 [2022-11-16 12:06:48,532 INFO L226 Difference]: Without dead ends: 988 [2022-11-16 12:06:48,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:48,532 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:48,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:06:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-11-16 12:06:48,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 988. [2022-11-16 12:06:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 974 states have (on average 2.8521560574948666) internal successors, (2778), 987 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2778 transitions. [2022-11-16 12:06:48,554 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2778 transitions. Word has length 13 [2022-11-16 12:06:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:48,555 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 2778 transitions. [2022-11-16 12:06:48,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:48,555 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2778 transitions. [2022-11-16 12:06:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:48,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:48,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:48,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-16 12:06:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:48,759 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:48,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1246669952, now seen corresponding path program 1 times [2022-11-16 12:06:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:48,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290799119] [2022-11-16 12:06:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:48,760 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 [2022-11-16 12:06:48,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:48,763 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:48,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 12:06:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:48,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:06:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:49,126 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 12:06:49,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 12:06:49,143 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 [2022-11-16 12:06:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:49,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:49,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:49,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290799119] [2022-11-16 12:06:49,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290799119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:49,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:49,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:49,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934245817] [2022-11-16 12:06:49,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:49,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:49,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:49,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:49,930 INFO L87 Difference]: Start difference. First operand 988 states and 2778 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:50,474 INFO L93 Difference]: Finished difference Result 999 states and 2797 transitions. [2022-11-16 12:06:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:06:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:50,477 INFO L225 Difference]: With dead ends: 999 [2022-11-16 12:06:50,477 INFO L226 Difference]: Without dead ends: 999 [2022-11-16 12:06:50,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:50,478 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:50,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 17 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2022-11-16 12:06:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2022-11-16 12:06:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 989. [2022-11-16 12:06:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 975 states have (on average 2.85025641025641) internal successors, (2779), 988 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2779 transitions. [2022-11-16 12:06:50,493 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2779 transitions. Word has length 13 [2022-11-16 12:06:50,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:50,493 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 2779 transitions. [2022-11-16 12:06:50,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2779 transitions. [2022-11-16 12:06:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:50,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:50,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:50,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 12:06:50,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:50,695 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1431537459, now seen corresponding path program 1 times [2022-11-16 12:06:50,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:50,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791662921] [2022-11-16 12:06:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:50,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:50,696 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:50,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 12:06:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:51,057 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:51,057 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 [2022-11-16 12:06:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:51,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:52,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:52,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791662921] [2022-11-16 12:06:52,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791662921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:52,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:52,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:52,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26899072] [2022-11-16 12:06:52,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:52,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:52,352 INFO L87 Difference]: Start difference. First operand 989 states and 2779 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:53,147 INFO L93 Difference]: Finished difference Result 1018 states and 2853 transitions. [2022-11-16 12:06:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:53,149 INFO L225 Difference]: With dead ends: 1018 [2022-11-16 12:06:53,150 INFO L226 Difference]: Without dead ends: 1018 [2022-11-16 12:06:53,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:53,150 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:53,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-16 12:06:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-11-16 12:06:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 992. [2022-11-16 12:06:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 978 states have (on average 2.850715746421268) internal successors, (2788), 991 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2788 transitions. [2022-11-16 12:06:53,172 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2788 transitions. Word has length 13 [2022-11-16 12:06:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:53,173 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 2788 transitions. [2022-11-16 12:06:53,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2788 transitions. [2022-11-16 12:06:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:53,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:53,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:53,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:53,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:53,387 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1431539443, now seen corresponding path program 1 times [2022-11-16 12:06:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014611578] [2022-11-16 12:06:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:53,387 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 [2022-11-16 12:06:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:53,388 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:53,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 12:06:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:53,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:53,752 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:53,753 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 [2022-11-16 12:06:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:54,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:55,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014611578] [2022-11-16 12:06:55,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014611578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:55,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:55,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636813876] [2022-11-16 12:06:55,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:55,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:55,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:55,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:55,179 INFO L87 Difference]: Start difference. First operand 992 states and 2788 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:55,618 INFO L93 Difference]: Finished difference Result 1025 states and 2875 transitions. [2022-11-16 12:06:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:55,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:55,621 INFO L225 Difference]: With dead ends: 1025 [2022-11-16 12:06:55,621 INFO L226 Difference]: Without dead ends: 1025 [2022-11-16 12:06:55,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:55,622 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:55,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-11-16 12:06:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-11-16 12:06:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 994. [2022-11-16 12:06:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 980 states have (on average 2.8510204081632655) internal successors, (2794), 993 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2794 transitions. [2022-11-16 12:06:55,636 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2794 transitions. Word has length 13 [2022-11-16 12:06:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:55,637 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 2794 transitions. [2022-11-16 12:06:55,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2794 transitions. [2022-11-16 12:06:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:55,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:55,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:55,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:55,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:55,850 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:55,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1431603024, now seen corresponding path program 1 times [2022-11-16 12:06:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:55,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484902946] [2022-11-16 12:06:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:55,850 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 [2022-11-16 12:06:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:55,851 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:55,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 12:06:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:56,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:56,211 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 [2022-11-16 12:06:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:56,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:57,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:57,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484902946] [2022-11-16 12:06:57,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484902946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:57,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:57,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:57,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727405486] [2022-11-16 12:06:57,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:57,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:57,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:57,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:57,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:57,229 INFO L87 Difference]: Start difference. First operand 994 states and 2794 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:57,691 INFO L93 Difference]: Finished difference Result 1021 states and 2871 transitions. [2022-11-16 12:06:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:57,694 INFO L225 Difference]: With dead ends: 1021 [2022-11-16 12:06:57,694 INFO L226 Difference]: Without dead ends: 1021 [2022-11-16 12:06:57,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:57,694 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:57,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-16 12:06:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-11-16 12:06:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 995. [2022-11-16 12:06:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 981 states have (on average 2.853211009174312) internal successors, (2799), 994 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2799 transitions. [2022-11-16 12:06:57,708 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2799 transitions. Word has length 13 [2022-11-16 12:06:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:57,709 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 2799 transitions. [2022-11-16 12:06:57,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:06:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2799 transitions. [2022-11-16 12:06:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:57,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:57,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:57,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-16 12:06:57,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:06:57,910 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:06:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:57,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1431602971, now seen corresponding path program 1 times [2022-11-16 12:06:57,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:06:57,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207477331] [2022-11-16 12:06:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:57,911 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 [2022-11-16 12:06:57,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:06:57,912 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:06:57,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 12:06:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:58,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:58,336 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:06:58,337 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 [2022-11-16 12:06:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:58,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:59,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:06:59,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207477331] [2022-11-16 12:06:59,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207477331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:59,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:06:59,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:06:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134213717] [2022-11-16 12:06:59,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:06:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:59,841 INFO L87 Difference]: Start difference. First operand 995 states and 2799 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:00,706 INFO L93 Difference]: Finished difference Result 1030 states and 2895 transitions. [2022-11-16 12:07:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:00,708 INFO L225 Difference]: With dead ends: 1030 [2022-11-16 12:07:00,708 INFO L226 Difference]: Without dead ends: 1030 [2022-11-16 12:07:00,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:00,709 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:00,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-11-16 12:07:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-11-16 12:07:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 999. [2022-11-16 12:07:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 985 states have (on average 2.8527918781725887) internal successors, (2810), 998 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2810 transitions. [2022-11-16 12:07:00,727 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2810 transitions. Word has length 13 [2022-11-16 12:07:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:00,727 INFO L495 AbstractCegarLoop]: Abstraction has 999 states and 2810 transitions. [2022-11-16 12:07:00,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2810 transitions. [2022-11-16 12:07:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:00,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:00,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:00,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:00,941 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1580741437, now seen corresponding path program 1 times [2022-11-16 12:07:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:00,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346699584] [2022-11-16 12:07:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:00,942 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 [2022-11-16 12:07:00,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:00,943 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:00,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 12:07:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:01,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:01,302 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:01,302 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 [2022-11-16 12:07:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:01,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:02,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:02,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346699584] [2022-11-16 12:07:02,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346699584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:02,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:02,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:02,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966847640] [2022-11-16 12:07:02,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:02,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:02,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:02,474 INFO L87 Difference]: Start difference. First operand 999 states and 2810 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:03,337 INFO L93 Difference]: Finished difference Result 1033 states and 2911 transitions. [2022-11-16 12:07:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:03,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:03,340 INFO L225 Difference]: With dead ends: 1033 [2022-11-16 12:07:03,340 INFO L226 Difference]: Without dead ends: 1033 [2022-11-16 12:07:03,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:03,341 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:03,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 85 Unchecked, 0.5s Time] [2022-11-16 12:07:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-11-16 12:07:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1000. [2022-11-16 12:07:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 986 states have (on average 2.8539553752535496) internal successors, (2814), 999 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 2814 transitions. [2022-11-16 12:07:03,360 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 2814 transitions. Word has length 13 [2022-11-16 12:07:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:03,361 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 2814 transitions. [2022-11-16 12:07:03,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 2814 transitions. [2022-11-16 12:07:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:03,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:03,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:03,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-16 12:07:03,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:03,562 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:03,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1578766396, now seen corresponding path program 1 times [2022-11-16 12:07:03,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:03,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770325858] [2022-11-16 12:07:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:03,563 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 [2022-11-16 12:07:03,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:03,564 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:03,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 12:07:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:03,963 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:03,964 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 [2022-11-16 12:07:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:04,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:04,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:04,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770325858] [2022-11-16 12:07:04,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770325858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:04,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:04,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:04,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538857505] [2022-11-16 12:07:04,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:04,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:04,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:04,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:04,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:04,973 INFO L87 Difference]: Start difference. First operand 1000 states and 2814 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:05,762 INFO L93 Difference]: Finished difference Result 1026 states and 2886 transitions. [2022-11-16 12:07:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:05,765 INFO L225 Difference]: With dead ends: 1026 [2022-11-16 12:07:05,765 INFO L226 Difference]: Without dead ends: 1026 [2022-11-16 12:07:05,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:05,765 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:05,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-11-16 12:07:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-11-16 12:07:05,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1001. [2022-11-16 12:07:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 987 states have (on average 2.8541033434650456) internal successors, (2817), 1000 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 2817 transitions. [2022-11-16 12:07:05,787 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 2817 transitions. Word has length 13 [2022-11-16 12:07:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:05,787 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 2817 transitions. [2022-11-16 12:07:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 2817 transitions. [2022-11-16 12:07:05,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:05,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:05,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:05,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:06,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:06,001 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash 413408772, now seen corresponding path program 1 times [2022-11-16 12:07:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123511432] [2022-11-16 12:07:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:06,002 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 [2022-11-16 12:07:06,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:06,003 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:06,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 12:07:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:07:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:06,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:06,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:06,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123511432] [2022-11-16 12:07:06,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123511432] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:06,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:06,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:07:06,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147716051] [2022-11-16 12:07:06,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:06,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:06,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:06,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:06,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:06,284 INFO L87 Difference]: Start difference. First operand 1001 states and 2817 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:07,234 INFO L93 Difference]: Finished difference Result 1794 states and 5038 transitions. [2022-11-16 12:07:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:07,239 INFO L225 Difference]: With dead ends: 1794 [2022-11-16 12:07:07,239 INFO L226 Difference]: Without dead ends: 1794 [2022-11-16 12:07:07,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:07:07,240 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 180 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:07,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 32 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:07:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-11-16 12:07:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1180. [2022-11-16 12:07:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1164 states have (on average 2.8530927835051547) internal successors, (3321), 1179 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3321 transitions. [2022-11-16 12:07:07,262 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3321 transitions. Word has length 13 [2022-11-16 12:07:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:07,263 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 3321 transitions. [2022-11-16 12:07:07,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3321 transitions. [2022-11-16 12:07:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:07,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:07,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:07,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-16 12:07:07,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:07,471 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 413574645, now seen corresponding path program 1 times [2022-11-16 12:07:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153375604] [2022-11-16 12:07:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:07,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:07,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:07,473 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:07,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 12:07:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:07,858 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:07,858 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 [2022-11-16 12:07:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:08,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:09,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:09,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153375604] [2022-11-16 12:07:09,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153375604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:09,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:09,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:09,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579614229] [2022-11-16 12:07:09,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:09,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:09,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:09,042 INFO L87 Difference]: Start difference. First operand 1180 states and 3321 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:09,829 INFO L93 Difference]: Finished difference Result 1224 states and 3455 transitions. [2022-11-16 12:07:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:09,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:09,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:09,832 INFO L225 Difference]: With dead ends: 1224 [2022-11-16 12:07:09,832 INFO L226 Difference]: Without dead ends: 1224 [2022-11-16 12:07:09,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:09,833 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:09,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-11-16 12:07:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-11-16 12:07:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1184. [2022-11-16 12:07:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1168 states have (on average 2.8553082191780823) internal successors, (3335), 1183 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3335 transitions. [2022-11-16 12:07:09,852 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3335 transitions. Word has length 13 [2022-11-16 12:07:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:09,852 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 3335 transitions. [2022-11-16 12:07:09,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3335 transitions. [2022-11-16 12:07:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:09,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:09,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:09,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:10,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:10,054 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash 415341149, now seen corresponding path program 1 times [2022-11-16 12:07:10,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:10,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559013662] [2022-11-16 12:07:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:10,055 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 [2022-11-16 12:07:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:10,056 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:10,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 12:07:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:10,462 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:10,462 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 [2022-11-16 12:07:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:10,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:11,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559013662] [2022-11-16 12:07:11,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559013662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:11,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:11,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:11,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073411142] [2022-11-16 12:07:11,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:11,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:11,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:11,483 INFO L87 Difference]: Start difference. First operand 1184 states and 3335 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:12,292 INFO L93 Difference]: Finished difference Result 1221 states and 3445 transitions. [2022-11-16 12:07:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:12,296 INFO L225 Difference]: With dead ends: 1221 [2022-11-16 12:07:12,296 INFO L226 Difference]: Without dead ends: 1221 [2022-11-16 12:07:12,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:12,296 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:12,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-16 12:07:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-11-16 12:07:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1186. [2022-11-16 12:07:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1170 states have (on average 2.8555555555555556) internal successors, (3341), 1185 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3341 transitions. [2022-11-16 12:07:12,314 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3341 transitions. Word has length 13 [2022-11-16 12:07:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:12,314 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 3341 transitions. [2022-11-16 12:07:12,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3341 transitions. [2022-11-16 12:07:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:12,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:12,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:12,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:12,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:12,515 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash 57701282, now seen corresponding path program 2 times [2022-11-16 12:07:12,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:12,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008734070] [2022-11-16 12:07:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:12,516 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 [2022-11-16 12:07:12,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:12,517 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:12,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 12:07:12,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:07:12,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:12,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:07:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:12,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:12,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:12,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008734070] [2022-11-16 12:07:12,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008734070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:12,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:12,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:07:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690807421] [2022-11-16 12:07:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:12,839 INFO L87 Difference]: Start difference. First operand 1186 states and 3341 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:13,757 INFO L93 Difference]: Finished difference Result 2040 states and 5697 transitions. [2022-11-16 12:07:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:13,762 INFO L225 Difference]: With dead ends: 2040 [2022-11-16 12:07:13,762 INFO L226 Difference]: Without dead ends: 2040 [2022-11-16 12:07:13,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:07:13,762 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:13,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 44 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:07:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-11-16 12:07:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1197. [2022-11-16 12:07:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1181 states have (on average 2.8577476714648604) internal successors, (3375), 1196 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3375 transitions. [2022-11-16 12:07:13,792 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3375 transitions. Word has length 13 [2022-11-16 12:07:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:13,792 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 3375 transitions. [2022-11-16 12:07:13,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3375 transitions. [2022-11-16 12:07:13,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:13,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:13,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:13,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:14,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:14,005 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:14,005 INFO L85 PathProgramCache]: Analyzing trace with hash 62169932, now seen corresponding path program 3 times [2022-11-16 12:07:14,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:14,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309710358] [2022-11-16 12:07:14,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:07:14,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:14,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:14,007 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:14,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-16 12:07:14,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:07:14,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:07:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:14,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:14,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:14,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309710358] [2022-11-16 12:07:14,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309710358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:14,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:14,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:07:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009645006] [2022-11-16 12:07:14,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:14,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:14,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:14,330 INFO L87 Difference]: Start difference. First operand 1197 states and 3375 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:15,351 INFO L93 Difference]: Finished difference Result 1679 states and 4611 transitions. [2022-11-16 12:07:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:07:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:15,356 INFO L225 Difference]: With dead ends: 1679 [2022-11-16 12:07:15,356 INFO L226 Difference]: Without dead ends: 1679 [2022-11-16 12:07:15,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:07:15,356 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:15,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 43 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:07:15,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-11-16 12:07:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1208. [2022-11-16 12:07:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1192 states have (on average 2.851510067114094) internal successors, (3399), 1207 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 3399 transitions. [2022-11-16 12:07:15,377 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 3399 transitions. Word has length 13 [2022-11-16 12:07:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:15,377 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 3399 transitions. [2022-11-16 12:07:15,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 3399 transitions. [2022-11-16 12:07:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:15,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:15,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:15,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-16 12:07:15,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:15,579 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash 64251264, now seen corresponding path program 1 times [2022-11-16 12:07:15,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:15,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539381519] [2022-11-16 12:07:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:15,579 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 [2022-11-16 12:07:15,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:15,580 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:15,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 12:07:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:15,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:15,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:15,957 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:15,958 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 [2022-11-16 12:07:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:16,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:16,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:16,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539381519] [2022-11-16 12:07:16,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539381519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:16,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:16,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:16,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23380575] [2022-11-16 12:07:16,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:16,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:16,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:16,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:16,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:16,927 INFO L87 Difference]: Start difference. First operand 1208 states and 3399 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:17,642 INFO L93 Difference]: Finished difference Result 1247 states and 3508 transitions. [2022-11-16 12:07:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:17,646 INFO L225 Difference]: With dead ends: 1247 [2022-11-16 12:07:17,646 INFO L226 Difference]: Without dead ends: 1247 [2022-11-16 12:07:17,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:17,646 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:17,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-11-16 12:07:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-11-16 12:07:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1210. [2022-11-16 12:07:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1194 states have (on average 2.8500837520938025) internal successors, (3403), 1209 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 3403 transitions. [2022-11-16 12:07:17,663 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 3403 transitions. Word has length 13 [2022-11-16 12:07:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:17,663 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 3403 transitions. [2022-11-16 12:07:17,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 3403 transitions. [2022-11-16 12:07:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:17,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:17,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:17,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-16 12:07:17,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:17,865 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2088447006, now seen corresponding path program 4 times [2022-11-16 12:07:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:17,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070100049] [2022-11-16 12:07:17,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:07:17,865 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 [2022-11-16 12:07:17,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:17,870 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:17,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 12:07:18,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:07:18,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:07:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:18,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:18,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:18,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070100049] [2022-11-16 12:07:18,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070100049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:18,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:18,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:07:18,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520292756] [2022-11-16 12:07:18,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:18,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:18,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:18,192 INFO L87 Difference]: Start difference. First operand 1210 states and 3403 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:19,287 INFO L93 Difference]: Finished difference Result 2060 states and 5744 transitions. [2022-11-16 12:07:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:07:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:19,292 INFO L225 Difference]: With dead ends: 2060 [2022-11-16 12:07:19,292 INFO L226 Difference]: Without dead ends: 2060 [2022-11-16 12:07:19,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:07:19,292 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:19,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 54 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:07:19,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-11-16 12:07:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1145. [2022-11-16 12:07:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1129 states have (on average 2.83348095659876) internal successors, (3199), 1144 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3199 transitions. [2022-11-16 12:07:19,315 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3199 transitions. Word has length 13 [2022-11-16 12:07:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:19,315 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 3199 transitions. [2022-11-16 12:07:19,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3199 transitions. [2022-11-16 12:07:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:19,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:19,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:19,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:19,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:19,517 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2083978356, now seen corresponding path program 5 times [2022-11-16 12:07:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:19,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371015409] [2022-11-16 12:07:19,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:07:19,518 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 [2022-11-16 12:07:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:19,518 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:19,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-16 12:07:19,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:07:19,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:19,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:07:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:19,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:19,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371015409] [2022-11-16 12:07:19,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371015409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:19,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:19,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:07:19,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057125142] [2022-11-16 12:07:19,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:19,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:19,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:19,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:19,838 INFO L87 Difference]: Start difference. First operand 1145 states and 3199 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:20,940 INFO L93 Difference]: Finished difference Result 1699 states and 4658 transitions. [2022-11-16 12:07:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:20,944 INFO L225 Difference]: With dead ends: 1699 [2022-11-16 12:07:20,944 INFO L226 Difference]: Without dead ends: 1699 [2022-11-16 12:07:20,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:07:20,945 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:20,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 61 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:07:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-11-16 12:07:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1134. [2022-11-16 12:07:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1118 states have (on average 2.830948121645796) internal successors, (3165), 1133 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3165 transitions. [2022-11-16 12:07:20,971 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3165 transitions. Word has length 13 [2022-11-16 12:07:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:20,971 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 3165 transitions. [2022-11-16 12:07:20,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3165 transitions. [2022-11-16 12:07:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:20,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:20,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:20,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-16 12:07:21,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:21,173 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash -239933436, now seen corresponding path program 6 times [2022-11-16 12:07:21,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:21,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692874163] [2022-11-16 12:07:21,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:07:21,174 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 [2022-11-16 12:07:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:21,174 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:21,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 12:07:21,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 12:07:21,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:07:21,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:21,558 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:21,558 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 [2022-11-16 12:07:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:21,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:21,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692874163] [2022-11-16 12:07:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692874163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:21,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:21,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149711860] [2022-11-16 12:07:21,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:07:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:07:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:21,843 INFO L87 Difference]: Start difference. First operand 1134 states and 3165 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:22,056 INFO L93 Difference]: Finished difference Result 1133 states and 3162 transitions. [2022-11-16 12:07:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:07:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:22,059 INFO L225 Difference]: With dead ends: 1133 [2022-11-16 12:07:22,059 INFO L226 Difference]: Without dead ends: 1133 [2022-11-16 12:07:22,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:07:22,060 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:22,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 12:07:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-11-16 12:07:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1133. [2022-11-16 12:07:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1117 states have (on average 2.8307967770814684) internal successors, (3162), 1132 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 3162 transitions. [2022-11-16 12:07:22,084 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 3162 transitions. Word has length 13 [2022-11-16 12:07:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:22,084 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 3162 transitions. [2022-11-16 12:07:22,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 3162 transitions. [2022-11-16 12:07:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:22,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:22,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:22,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:22,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:22,298 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash -239931297, now seen corresponding path program 1 times [2022-11-16 12:07:22,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:22,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403463288] [2022-11-16 12:07:22,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:22,299 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 [2022-11-16 12:07:22,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:22,300 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:22,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-16 12:07:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:22,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:22,731 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:22,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:07:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:23,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:23,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:23,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403463288] [2022-11-16 12:07:23,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403463288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:23,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:23,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:23,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213407162] [2022-11-16 12:07:23,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:23,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:23,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:23,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:23,899 INFO L87 Difference]: Start difference. First operand 1133 states and 3162 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:24,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:24,534 INFO L93 Difference]: Finished difference Result 1164 states and 3245 transitions. [2022-11-16 12:07:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:24,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:24,536 INFO L225 Difference]: With dead ends: 1164 [2022-11-16 12:07:24,536 INFO L226 Difference]: Without dead ends: 1164 [2022-11-16 12:07:24,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:24,537 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:24,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-11-16 12:07:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-16 12:07:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1137. [2022-11-16 12:07:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1121 states have (on average 2.831400535236396) internal successors, (3174), 1136 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3174 transitions. [2022-11-16 12:07:24,550 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3174 transitions. Word has length 13 [2022-11-16 12:07:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:24,550 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 3174 transitions. [2022-11-16 12:07:24,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3174 transitions. [2022-11-16 12:07:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:24,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:24,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:24,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-16 12:07:24,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:24,752 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash -239809095, now seen corresponding path program 1 times [2022-11-16 12:07:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:24,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151526938] [2022-11-16 12:07:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:24,753 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 [2022-11-16 12:07:24,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:24,754 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:24,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 12:07:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:24,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:24,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:25,143 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:25,143 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 [2022-11-16 12:07:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:25,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:26,221 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:26,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151526938] [2022-11-16 12:07:26,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151526938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:26,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:26,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537218879] [2022-11-16 12:07:26,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:26,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:26,223 INFO L87 Difference]: Start difference. First operand 1137 states and 3174 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:26,958 INFO L93 Difference]: Finished difference Result 1156 states and 3235 transitions. [2022-11-16 12:07:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:26,961 INFO L225 Difference]: With dead ends: 1156 [2022-11-16 12:07:26,961 INFO L226 Difference]: Without dead ends: 1156 [2022-11-16 12:07:26,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:26,962 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:26,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-11-16 12:07:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-11-16 12:07:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1138. [2022-11-16 12:07:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1122 states have (on average 2.8333333333333335) internal successors, (3179), 1137 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3179 transitions. [2022-11-16 12:07:26,981 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3179 transitions. Word has length 13 [2022-11-16 12:07:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:26,981 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 3179 transitions. [2022-11-16 12:07:26,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3179 transitions. [2022-11-16 12:07:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:26,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:26,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:26,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:27,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:27,184 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash -239809165, now seen corresponding path program 1 times [2022-11-16 12:07:27,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:27,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995892304] [2022-11-16 12:07:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:27,185 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 [2022-11-16 12:07:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:27,186 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:27,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-16 12:07:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:27,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:27,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:27,610 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:27,610 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 [2022-11-16 12:07:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:27,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:28,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995892304] [2022-11-16 12:07:28,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995892304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:28,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:28,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094610411] [2022-11-16 12:07:28,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:28,588 INFO L87 Difference]: Start difference. First operand 1138 states and 3179 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:29,329 INFO L93 Difference]: Finished difference Result 1162 states and 3253 transitions. [2022-11-16 12:07:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:29,332 INFO L225 Difference]: With dead ends: 1162 [2022-11-16 12:07:29,332 INFO L226 Difference]: Without dead ends: 1162 [2022-11-16 12:07:29,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:29,333 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:29,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-11-16 12:07:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-11-16 12:07:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1141. [2022-11-16 12:07:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1125 states have (on average 2.8337777777777777) internal successors, (3188), 1140 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3188 transitions. [2022-11-16 12:07:29,349 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3188 transitions. Word has length 13 [2022-11-16 12:07:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:29,350 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 3188 transitions. [2022-11-16 12:07:29,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3188 transitions. [2022-11-16 12:07:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:29,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:29,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:29,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:29,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:29,551 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash -238647316, now seen corresponding path program 1 times [2022-11-16 12:07:29,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:29,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817736670] [2022-11-16 12:07:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:29,552 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 [2022-11-16 12:07:29,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:29,553 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:29,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-16 12:07:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:29,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:29,947 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:29,947 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 [2022-11-16 12:07:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:30,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:30,925 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:30,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817736670] [2022-11-16 12:07:30,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817736670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:30,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:30,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379490948] [2022-11-16 12:07:30,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:30,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:30,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:30,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:30,927 INFO L87 Difference]: Start difference. First operand 1141 states and 3188 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:31,560 INFO L93 Difference]: Finished difference Result 1174 states and 3285 transitions. [2022-11-16 12:07:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:31,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:31,563 INFO L225 Difference]: With dead ends: 1174 [2022-11-16 12:07:31,563 INFO L226 Difference]: Without dead ends: 1174 [2022-11-16 12:07:31,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:31,564 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:31,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-11-16 12:07:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-11-16 12:07:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1142. [2022-11-16 12:07:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1126 states have (on average 2.8348134991119007) internal successors, (3192), 1141 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3192 transitions. [2022-11-16 12:07:31,592 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3192 transitions. Word has length 13 [2022-11-16 12:07:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:31,592 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 3192 transitions. [2022-11-16 12:07:31,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3192 transitions. [2022-11-16 12:07:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:31,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:31,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:31,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-16 12:07:31,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:31,798 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:31,799 INFO L85 PathProgramCache]: Analyzing trace with hash -234855024, now seen corresponding path program 1 times [2022-11-16 12:07:31,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:31,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377721512] [2022-11-16 12:07:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:31,799 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 [2022-11-16 12:07:31,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:31,800 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:31,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-16 12:07:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:32,191 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:32,191 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 [2022-11-16 12:07:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:32,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:33,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377721512] [2022-11-16 12:07:33,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377721512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:33,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:33,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:07:33,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186001714] [2022-11-16 12:07:33,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:33,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:07:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:07:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:33,282 INFO L87 Difference]: Start difference. First operand 1142 states and 3192 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:33,956 INFO L93 Difference]: Finished difference Result 1162 states and 3252 transitions. [2022-11-16 12:07:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:07:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:07:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:33,960 INFO L225 Difference]: With dead ends: 1162 [2022-11-16 12:07:33,960 INFO L226 Difference]: Without dead ends: 1162 [2022-11-16 12:07:33,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:33,960 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:33,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-16 12:07:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-11-16 12:07:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1143. [2022-11-16 12:07:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1127 states have (on average 2.834960070984916) internal successors, (3195), 1142 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 3195 transitions. [2022-11-16 12:07:33,982 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 3195 transitions. Word has length 13 [2022-11-16 12:07:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:33,983 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 3195 transitions. [2022-11-16 12:07:33,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-16 12:07:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 3195 transitions. [2022-11-16 12:07:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:07:33,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:33,984 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:34,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:34,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:34,191 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1397032509, now seen corresponding path program 2 times [2022-11-16 12:07:34,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491257174] [2022-11-16 12:07:34,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:34,192 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 [2022-11-16 12:07:34,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:34,193 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:34,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 12:07:34,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:07:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:07:34,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:34,535 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 12:07:34,535 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 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 12:07:34,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 12:07:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:34,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:34,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:34,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491257174] [2022-11-16 12:07:34,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491257174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:34,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:34,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121006803] [2022-11-16 12:07:34,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:34,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:07:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:07:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:34,839 INFO L87 Difference]: Start difference. First operand 1143 states and 3195 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:35,050 INFO L93 Difference]: Finished difference Result 1142 states and 3193 transitions. [2022-11-16 12:07:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:07:35,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14 [2022-11-16 12:07:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:35,053 INFO L225 Difference]: With dead ends: 1142 [2022-11-16 12:07:35,053 INFO L226 Difference]: Without dead ends: 1142 [2022-11-16 12:07:35,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:07:35,053 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:35,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:07:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-11-16 12:07:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1142. [2022-11-16 12:07:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1126 states have (on average 2.835701598579041) internal successors, (3193), 1141 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3193 transitions. [2022-11-16 12:07:35,069 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3193 transitions. Word has length 14 [2022-11-16 12:07:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:35,069 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 3193 transitions. [2022-11-16 12:07:35,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3193 transitions. [2022-11-16 12:07:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:07:35,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:35,070 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:35,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-16 12:07:35,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:35,270 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1391069133, now seen corresponding path program 2 times [2022-11-16 12:07:35,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:35,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563209308] [2022-11-16 12:07:35,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:35,271 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 [2022-11-16 12:07:35,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:35,272 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:35,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-16 12:07:35,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:07:35,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:07:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:35,705 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:35,705 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 [2022-11-16 12:07:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:35,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:35,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563209308] [2022-11-16 12:07:35,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563209308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:35,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:35,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:35,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136702137] [2022-11-16 12:07:35,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:35,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:07:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:07:35,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:35,958 INFO L87 Difference]: Start difference. First operand 1142 states and 3193 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:36,180 INFO L93 Difference]: Finished difference Result 1141 states and 3190 transitions. [2022-11-16 12:07:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:07:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14 [2022-11-16 12:07:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:36,183 INFO L225 Difference]: With dead ends: 1141 [2022-11-16 12:07:36,183 INFO L226 Difference]: Without dead ends: 1141 [2022-11-16 12:07:36,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:07:36,184 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:36,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 12:07:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-11-16 12:07:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1141. [2022-11-16 12:07:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1125 states have (on average 2.8355555555555556) internal successors, (3190), 1140 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3190 transitions. [2022-11-16 12:07:36,203 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3190 transitions. Word has length 14 [2022-11-16 12:07:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:36,203 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 3190 transitions. [2022-11-16 12:07:36,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3190 transitions. [2022-11-16 12:07:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:07:36,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:36,204 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:36,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:36,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:36,405 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1391066932, now seen corresponding path program 2 times [2022-11-16 12:07:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:36,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484828968] [2022-11-16 12:07:36,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:36,406 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 [2022-11-16 12:07:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:36,406 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:36,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 12:07:36,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:07:36,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:07:36,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:36,814 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:36,815 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 [2022-11-16 12:07:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:37,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:37,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:37,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484828968] [2022-11-16 12:07:37,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484828968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:37,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:37,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304612181] [2022-11-16 12:07:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:07:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:07:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:37,093 INFO L87 Difference]: Start difference. First operand 1141 states and 3190 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:37,327 INFO L93 Difference]: Finished difference Result 1140 states and 3187 transitions. [2022-11-16 12:07:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:07:37,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14 [2022-11-16 12:07:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:37,329 INFO L225 Difference]: With dead ends: 1140 [2022-11-16 12:07:37,329 INFO L226 Difference]: Without dead ends: 1140 [2022-11-16 12:07:37,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:07:37,330 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:37,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 12:07:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-11-16 12:07:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2022-11-16 12:07:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1124 states have (on average 2.8354092526690393) internal successors, (3187), 1139 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3187 transitions. [2022-11-16 12:07:37,352 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3187 transitions. Word has length 14 [2022-11-16 12:07:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:37,352 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 3187 transitions. [2022-11-16 12:07:37,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3187 transitions. [2022-11-16 12:07:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:07:37,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:37,353 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:37,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-16 12:07:37,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:37,565 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:37,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1211081140, now seen corresponding path program 2 times [2022-11-16 12:07:37,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:37,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186203577] [2022-11-16 12:07:37,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:37,566 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 [2022-11-16 12:07:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:37,567 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:37,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-16 12:07:37,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:07:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:37,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:07:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:37,927 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:37,927 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 [2022-11-16 12:07:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:38,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:38,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:38,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186203577] [2022-11-16 12:07:38,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186203577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:38,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:38,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:38,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514208625] [2022-11-16 12:07:38,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:38,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:07:38,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:38,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:07:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:38,167 INFO L87 Difference]: Start difference. First operand 1140 states and 3187 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:38,377 INFO L93 Difference]: Finished difference Result 1139 states and 3183 transitions. [2022-11-16 12:07:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:07:38,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14 [2022-11-16 12:07:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:38,381 INFO L225 Difference]: With dead ends: 1139 [2022-11-16 12:07:38,381 INFO L226 Difference]: Without dead ends: 1139 [2022-11-16 12:07:38,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:07:38,382 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:38,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:07:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-11-16 12:07:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2022-11-16 12:07:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1123 states have (on average 2.8343722172751558) internal successors, (3183), 1138 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 3183 transitions. [2022-11-16 12:07:38,402 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 3183 transitions. Word has length 14 [2022-11-16 12:07:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:38,402 INFO L495 AbstractCegarLoop]: Abstraction has 1139 states and 3183 transitions. [2022-11-16 12:07:38,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 3183 transitions. [2022-11-16 12:07:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:07:38,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:38,403 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:38,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-16 12:07:38,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:07:38,604 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:07:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash 100170899, now seen corresponding path program 2 times [2022-11-16 12:07:38,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:07:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500274899] [2022-11-16 12:07:38,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:38,604 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 [2022-11-16 12:07:38,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:07:38,605 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:07:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-16 12:07:38,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:07:38,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:07:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:38,989 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:07:38,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:07:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:07:39,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:39,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:07:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500274899] [2022-11-16 12:07:39,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500274899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:39,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:39,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:39,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493638150] [2022-11-16 12:07:39,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:39,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:07:39,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:07:39,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:07:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:39,270 INFO L87 Difference]: Start difference. First operand 1139 states and 3183 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:39,478 INFO L93 Difference]: Finished difference Result 1138 states and 3179 transitions. [2022-11-16 12:07:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:07:39,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 14 [2022-11-16 12:07:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:39,481 INFO L225 Difference]: With dead ends: 1138 [2022-11-16 12:07:39,482 INFO L226 Difference]: Without dead ends: 1138 [2022-11-16 12:07:39,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:07:39,482 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:39,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:07:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-11-16 12:07:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2022-11-16 12:07:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1122 states have (on average 2.8333333333333335) internal successors, (3179), 1137 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3179 transitions. [2022-11-16 12:07:39,507 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3179 transitions. Word has length 14 [2022-11-16 12:07:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:39,507 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 3179 transitions. [2022-11-16 12:07:39,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 12:07:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3179 transitions. [2022-11-16 12:07:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:07:39,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:39,509 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:39,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-16 12:09:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:09:29,630 INFO L87 Difference]: Start difference. First operand 902 states and 2366 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:30,290 INFO L93 Difference]: Finished difference Result 975 states and 2589 transitions. [2022-11-16 12:09:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:09:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:09:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:30,293 INFO L225 Difference]: With dead ends: 975 [2022-11-16 12:09:30,293 INFO L226 Difference]: Without dead ends: 975 [2022-11-16 12:09:30,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:09:30,293 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:30,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-11-16 12:09:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-16 12:09:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 905. [2022-11-16 12:09:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 890 states have (on average 2.668539325842697) internal successors, (2375), 904 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2375 transitions. [2022-11-16 12:09:30,303 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2375 transitions. Word has length 15 [2022-11-16 12:09:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:30,304 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 2375 transitions. [2022-11-16 12:09:30,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2375 transitions. [2022-11-16 12:09:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:09:30,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:30,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:30,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:30,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:30,505 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:30,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1354224669, now seen corresponding path program 1 times [2022-11-16 12:09:30,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:30,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146338041] [2022-11-16 12:09:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:30,505 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 [2022-11-16 12:09:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:30,506 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:30,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-16 12:09:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:09:30,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:31,003 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:31,004 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 [2022-11-16 12:09:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:31,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:32,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:32,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146338041] [2022-11-16 12:09:32,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146338041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:32,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:32,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:09:32,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827406915] [2022-11-16 12:09:32,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:32,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:09:32,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:09:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:09:32,141 INFO L87 Difference]: Start difference. First operand 905 states and 2375 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:32,835 INFO L93 Difference]: Finished difference Result 955 states and 2524 transitions. [2022-11-16 12:09:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:09:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:09:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:32,837 INFO L225 Difference]: With dead ends: 955 [2022-11-16 12:09:32,838 INFO L226 Difference]: Without dead ends: 955 [2022-11-16 12:09:32,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:09:32,838 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:32,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-16 12:09:32,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-11-16 12:09:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 906. [2022-11-16 12:09:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 891 states have (on average 2.67003367003367) internal successors, (2379), 905 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2379 transitions. [2022-11-16 12:09:32,849 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2379 transitions. Word has length 15 [2022-11-16 12:09:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:32,849 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 2379 transitions. [2022-11-16 12:09:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2379 transitions. [2022-11-16 12:09:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:09:32,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:32,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:32,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:33,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:33,055 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1354224599, now seen corresponding path program 1 times [2022-11-16 12:09:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:33,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953036435] [2022-11-16 12:09:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:33,056 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 [2022-11-16 12:09:33,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:33,057 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:33,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-16 12:09:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:09:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:33,555 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:33,555 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 [2022-11-16 12:09:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:33,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:34,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:34,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953036435] [2022-11-16 12:09:34,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953036435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:34,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:34,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:09:34,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585432496] [2022-11-16 12:09:34,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:34,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:09:34,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:34,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:09:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:09:34,758 INFO L87 Difference]: Start difference. First operand 906 states and 2379 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:35,389 INFO L93 Difference]: Finished difference Result 964 states and 2551 transitions. [2022-11-16 12:09:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:09:35,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:09:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:35,392 INFO L225 Difference]: With dead ends: 964 [2022-11-16 12:09:35,392 INFO L226 Difference]: Without dead ends: 964 [2022-11-16 12:09:35,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:09:35,392 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:35,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-16 12:09:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-11-16 12:09:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 907. [2022-11-16 12:09:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 892 states have (on average 2.6692825112107625) internal successors, (2381), 906 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2381 transitions. [2022-11-16 12:09:35,407 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2381 transitions. Word has length 15 [2022-11-16 12:09:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:35,407 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 2381 transitions. [2022-11-16 12:09:35,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2381 transitions. [2022-11-16 12:09:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:09:35,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:35,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:35,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-16 12:09:35,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:35,609 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:35,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1354225661, now seen corresponding path program 1 times [2022-11-16 12:09:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906884580] [2022-11-16 12:09:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:35,609 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 [2022-11-16 12:09:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:35,610 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:35,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-16 12:09:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:09:36,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:36,165 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:36,166 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 [2022-11-16 12:09:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:36,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:38,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:38,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906884580] [2022-11-16 12:09:38,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906884580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:38,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:38,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:09:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932595508] [2022-11-16 12:09:38,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:09:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:09:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:09:38,478 INFO L87 Difference]: Start difference. First operand 907 states and 2381 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:38,968 INFO L93 Difference]: Finished difference Result 960 states and 2535 transitions. [2022-11-16 12:09:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:09:38,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:09:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:38,970 INFO L225 Difference]: With dead ends: 960 [2022-11-16 12:09:38,970 INFO L226 Difference]: Without dead ends: 960 [2022-11-16 12:09:38,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:09:38,970 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:38,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-11-16 12:09:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-11-16 12:09:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 909. [2022-11-16 12:09:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 894 states have (on average 2.670022371364653) internal successors, (2387), 908 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 2387 transitions. [2022-11-16 12:09:38,981 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 2387 transitions. Word has length 15 [2022-11-16 12:09:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:38,981 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 2387 transitions. [2022-11-16 12:09:38,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 2387 transitions. [2022-11-16 12:09:38,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:09:38,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:38,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:38,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:39,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:39,182 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1471786713, now seen corresponding path program 1 times [2022-11-16 12:09:39,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:39,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569034099] [2022-11-16 12:09:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:39,183 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 [2022-11-16 12:09:39,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:39,184 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:39,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-16 12:09:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:09:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:39,696 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:39,697 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 [2022-11-16 12:09:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:40,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:40,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:40,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569034099] [2022-11-16 12:09:40,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569034099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:40,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:40,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:09:40,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20584933] [2022-11-16 12:09:40,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:40,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:09:40,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:40,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:09:40,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:09:40,747 INFO L87 Difference]: Start difference. First operand 909 states and 2387 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:41,529 INFO L93 Difference]: Finished difference Result 946 states and 2490 transitions. [2022-11-16 12:09:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:09:41,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:09:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:41,531 INFO L225 Difference]: With dead ends: 946 [2022-11-16 12:09:41,531 INFO L226 Difference]: Without dead ends: 946 [2022-11-16 12:09:41,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:09:41,532 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:41,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-11-16 12:09:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-11-16 12:09:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 913. [2022-11-16 12:09:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 898 states have (on average 2.6670378619153676) internal successors, (2395), 912 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 2395 transitions. [2022-11-16 12:09:41,542 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 2395 transitions. Word has length 15 [2022-11-16 12:09:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:41,542 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 2395 transitions. [2022-11-16 12:09:41,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2022-11-16 12:09:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 2395 transitions. [2022-11-16 12:09:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:41,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:41,543 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:41,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Ended with exit code 0 [2022-11-16 12:09:41,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:41,743 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:41,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:41,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1082546401, now seen corresponding path program 2 times [2022-11-16 12:09:41,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:41,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92145848] [2022-11-16 12:09:41,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:41,744 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 [2022-11-16 12:09:41,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:41,745 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:41,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-16 12:09:42,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:42,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:42,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:42,260 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:42,261 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 [2022-11-16 12:09:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:42,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:42,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:42,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92145848] [2022-11-16 12:09:42,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92145848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:42,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:42,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386509392] [2022-11-16 12:09:42,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:42,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:42,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:42,554 INFO L87 Difference]: Start difference. First operand 913 states and 2395 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:42,748 INFO L93 Difference]: Finished difference Result 912 states and 2393 transitions. [2022-11-16 12:09:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:42,750 INFO L225 Difference]: With dead ends: 912 [2022-11-16 12:09:42,750 INFO L226 Difference]: Without dead ends: 912 [2022-11-16 12:09:42,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:42,750 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:42,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-16 12:09:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-11-16 12:09:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2022-11-16 12:09:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 897 states have (on average 2.6677814938684503) internal successors, (2393), 911 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2393 transitions. [2022-11-16 12:09:42,760 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2393 transitions. Word has length 16 [2022-11-16 12:09:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:42,760 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 2393 transitions. [2022-11-16 12:09:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2393 transitions. [2022-11-16 12:09:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:42,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:42,761 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:42,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:42,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:42,967 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1082541069, now seen corresponding path program 2 times [2022-11-16 12:09:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:42,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360726840] [2022-11-16 12:09:42,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:42,968 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 [2022-11-16 12:09:42,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:42,968 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:42,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-16 12:09:43,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:43,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:43,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:43,470 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:43,470 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 [2022-11-16 12:09:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:43,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:43,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:43,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360726840] [2022-11-16 12:09:43,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360726840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:43,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:43,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790252159] [2022-11-16 12:09:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:43,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:43,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:43,762 INFO L87 Difference]: Start difference. First operand 912 states and 2393 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:43,960 INFO L93 Difference]: Finished difference Result 911 states and 2390 transitions. [2022-11-16 12:09:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:43,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:43,962 INFO L225 Difference]: With dead ends: 911 [2022-11-16 12:09:43,962 INFO L226 Difference]: Without dead ends: 911 [2022-11-16 12:09:43,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:43,963 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:43,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-16 12:09:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-11-16 12:09:43,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 911. [2022-11-16 12:09:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 896 states have (on average 2.6674107142857144) internal successors, (2390), 910 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2390 transitions. [2022-11-16 12:09:43,974 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2390 transitions. Word has length 16 [2022-11-16 12:09:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:43,974 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 2390 transitions. [2022-11-16 12:09:43,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:43,974 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2390 transitions. [2022-11-16 12:09:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:43,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:43,975 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:43,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:44,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:44,176 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:44,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1082484215, now seen corresponding path program 2 times [2022-11-16 12:09:44,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:44,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130138643] [2022-11-16 12:09:44,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:44,176 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 [2022-11-16 12:09:44,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:44,177 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:44,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-16 12:09:44,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:44,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:44,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:44,673 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 [2022-11-16 12:09:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:44,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:44,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130138643] [2022-11-16 12:09:44,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130138643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:44,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:44,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:44,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067526574] [2022-11-16 12:09:44,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:44,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:44,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:44,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:44,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:44,974 INFO L87 Difference]: Start difference. First operand 911 states and 2390 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:45,151 INFO L93 Difference]: Finished difference Result 910 states and 2385 transitions. [2022-11-16 12:09:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:45,153 INFO L225 Difference]: With dead ends: 910 [2022-11-16 12:09:45,154 INFO L226 Difference]: Without dead ends: 910 [2022-11-16 12:09:45,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:45,154 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:45,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:09:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-11-16 12:09:45,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 910. [2022-11-16 12:09:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 895 states have (on average 2.664804469273743) internal successors, (2385), 909 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2385 transitions. [2022-11-16 12:09:45,164 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2385 transitions. Word has length 16 [2022-11-16 12:09:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:45,164 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 2385 transitions. [2022-11-16 12:09:45,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2385 transitions. [2022-11-16 12:09:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:45,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:45,165 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:45,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:45,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:45,365 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1082484268, now seen corresponding path program 2 times [2022-11-16 12:09:45,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:45,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799066976] [2022-11-16 12:09:45,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:45,366 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 [2022-11-16 12:09:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:45,367 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:45,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-16 12:09:45,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:45,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:45,868 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:45,868 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 [2022-11-16 12:09:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:46,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:46,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:46,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799066976] [2022-11-16 12:09:46,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799066976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:46,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:46,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095618790] [2022-11-16 12:09:46,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:46,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:46,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:46,196 INFO L87 Difference]: Start difference. First operand 910 states and 2385 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:46,366 INFO L93 Difference]: Finished difference Result 907 states and 2374 transitions. [2022-11-16 12:09:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:46,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:46,368 INFO L225 Difference]: With dead ends: 907 [2022-11-16 12:09:46,368 INFO L226 Difference]: Without dead ends: 907 [2022-11-16 12:09:46,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:46,368 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:46,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:09:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-11-16 12:09:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-11-16 12:09:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 892 states have (on average 2.6614349775784754) internal successors, (2374), 906 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2374 transitions. [2022-11-16 12:09:46,379 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2374 transitions. Word has length 16 [2022-11-16 12:09:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:46,379 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 2374 transitions. [2022-11-16 12:09:46,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2374 transitions. [2022-11-16 12:09:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:46,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:46,380 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:46,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:46,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:46,580 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1080509174, now seen corresponding path program 2 times [2022-11-16 12:09:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:46,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650678009] [2022-11-16 12:09:46,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:46,581 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 [2022-11-16 12:09:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:46,582 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:46,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2022-11-16 12:09:46,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:46,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:47,110 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:47,110 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 [2022-11-16 12:09:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:47,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:47,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650678009] [2022-11-16 12:09:47,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650678009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:47,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:47,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:47,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633886574] [2022-11-16 12:09:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:47,398 INFO L87 Difference]: Start difference. First operand 907 states and 2374 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:47,572 INFO L93 Difference]: Finished difference Result 906 states and 2370 transitions. [2022-11-16 12:09:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:47,574 INFO L225 Difference]: With dead ends: 906 [2022-11-16 12:09:47,574 INFO L226 Difference]: Without dead ends: 906 [2022-11-16 12:09:47,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:47,574 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:47,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:09:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-11-16 12:09:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 906. [2022-11-16 12:09:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 891 states have (on average 2.65993265993266) internal successors, (2370), 905 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2370 transitions. [2022-11-16 12:09:47,586 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2370 transitions. Word has length 16 [2022-11-16 12:09:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:47,586 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 2370 transitions. [2022-11-16 12:09:47,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2370 transitions. [2022-11-16 12:09:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:47,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:47,587 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:47,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Ended with exit code 0 [2022-11-16 12:09:47,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:47,788 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:47,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1080509227, now seen corresponding path program 2 times [2022-11-16 12:09:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:47,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542370340] [2022-11-16 12:09:47,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:47,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:47,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:47,789 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:47,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-16 12:09:48,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:48,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:48,301 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:48,302 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 [2022-11-16 12:09:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:48,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:48,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:48,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542370340] [2022-11-16 12:09:48,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542370340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:48,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:48,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468213463] [2022-11-16 12:09:48,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:48,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:48,601 INFO L87 Difference]: Start difference. First operand 906 states and 2370 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:48,772 INFO L93 Difference]: Finished difference Result 903 states and 2362 transitions. [2022-11-16 12:09:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:48,774 INFO L225 Difference]: With dead ends: 903 [2022-11-16 12:09:48,774 INFO L226 Difference]: Without dead ends: 903 [2022-11-16 12:09:48,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:48,775 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:48,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:09:48,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-16 12:09:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 903. [2022-11-16 12:09:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 888 states have (on average 2.65990990990991) internal successors, (2362), 902 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2362 transitions. [2022-11-16 12:09:48,784 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2362 transitions. Word has length 16 [2022-11-16 12:09:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:48,785 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 2362 transitions. [2022-11-16 12:09:48,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2362 transitions. [2022-11-16 12:09:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:48,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:48,785 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:48,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Ended with exit code 0 [2022-11-16 12:09:48,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:48,986 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1080508182, now seen corresponding path program 2 times [2022-11-16 12:09:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:48,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946530186] [2022-11-16 12:09:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:48,987 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 [2022-11-16 12:09:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:48,987 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:48,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-16 12:09:49,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:49,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:49,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:09:49,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:49,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:49,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:49,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946530186] [2022-11-16 12:09:49,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946530186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:49,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:49,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:09:49,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798008376] [2022-11-16 12:09:49,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:09:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:09:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:49,523 INFO L87 Difference]: Start difference. First operand 903 states and 2362 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:50,244 INFO L93 Difference]: Finished difference Result 899 states and 2339 transitions. [2022-11-16 12:09:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:50,246 INFO L225 Difference]: With dead ends: 899 [2022-11-16 12:09:50,246 INFO L226 Difference]: Without dead ends: 899 [2022-11-16 12:09:50,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:09:50,247 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:50,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:09:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-16 12:09:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 875. [2022-11-16 12:09:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 860 states have (on average 2.646511627906977) internal successors, (2276), 874 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2276 transitions. [2022-11-16 12:09:50,256 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2276 transitions. Word has length 16 [2022-11-16 12:09:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:50,257 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 2276 transitions. [2022-11-16 12:09:50,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2276 transitions. [2022-11-16 12:09:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:50,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:50,258 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:50,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Ended with exit code 0 [2022-11-16 12:09:50,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:50,458 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash 24328133, now seen corresponding path program 2 times [2022-11-16 12:09:50,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:50,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383582099] [2022-11-16 12:09:50,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:50,459 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 [2022-11-16 12:09:50,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:50,460 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:50,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2022-11-16 12:09:50,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:50,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:50,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:50,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:50,975 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:50,976 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 [2022-11-16 12:09:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:51,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:51,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:51,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383582099] [2022-11-16 12:09:51,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383582099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:51,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:51,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:51,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260163746] [2022-11-16 12:09:51,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:51,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:51,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:51,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:51,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:51,262 INFO L87 Difference]: Start difference. First operand 875 states and 2276 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:51,444 INFO L93 Difference]: Finished difference Result 873 states and 2269 transitions. [2022-11-16 12:09:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:51,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:51,446 INFO L225 Difference]: With dead ends: 873 [2022-11-16 12:09:51,446 INFO L226 Difference]: Without dead ends: 873 [2022-11-16 12:09:51,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:51,447 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:51,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:09:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-16 12:09:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2022-11-16 12:09:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 858 states have (on average 2.6445221445221447) internal successors, (2269), 872 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2269 transitions. [2022-11-16 12:09:51,456 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2269 transitions. Word has length 16 [2022-11-16 12:09:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:51,456 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 2269 transitions. [2022-11-16 12:09:51,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2269 transitions. [2022-11-16 12:09:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:51,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:51,457 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:51,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:51,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:51,658 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:51,658 INFO L85 PathProgramCache]: Analyzing trace with hash 26094637, now seen corresponding path program 2 times [2022-11-16 12:09:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090376248] [2022-11-16 12:09:51,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:51,659 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 [2022-11-16 12:09:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:51,659 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:51,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2022-11-16 12:09:52,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:52,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:52,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:52,166 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:52,166 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 [2022-11-16 12:09:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:52,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:52,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090376248] [2022-11-16 12:09:52,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090376248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:52,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:52,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:52,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926458428] [2022-11-16 12:09:52,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:52,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:52,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:52,457 INFO L87 Difference]: Start difference. First operand 873 states and 2269 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:52,629 INFO L93 Difference]: Finished difference Result 872 states and 2266 transitions. [2022-11-16 12:09:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:52,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:52,631 INFO L225 Difference]: With dead ends: 872 [2022-11-16 12:09:52,631 INFO L226 Difference]: Without dead ends: 872 [2022-11-16 12:09:52,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:52,632 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:52,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:09:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-16 12:09:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2022-11-16 12:09:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 857 states have (on average 2.644107351225204) internal successors, (2266), 871 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2266 transitions. [2022-11-16 12:09:52,641 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2266 transitions. Word has length 16 [2022-11-16 12:09:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:52,641 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 2266 transitions. [2022-11-16 12:09:52,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2266 transitions. [2022-11-16 12:09:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:52,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:52,642 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:52,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:52,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:52,843 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1715367103, now seen corresponding path program 2 times [2022-11-16 12:09:52,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919821021] [2022-11-16 12:09:52,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:52,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:52,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:52,844 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:52,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-16 12:09:53,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:53,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:53,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:53,354 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:53,355 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 [2022-11-16 12:09:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:53,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:53,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:53,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919821021] [2022-11-16 12:09:53,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919821021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:53,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:53,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:53,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476622664] [2022-11-16 12:09:53,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:53,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:53,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:53,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:53,656 INFO L87 Difference]: Start difference. First operand 872 states and 2266 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:53,861 INFO L93 Difference]: Finished difference Result 870 states and 2259 transitions. [2022-11-16 12:09:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:53,863 INFO L225 Difference]: With dead ends: 870 [2022-11-16 12:09:53,864 INFO L226 Difference]: Without dead ends: 870 [2022-11-16 12:09:53,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:53,864 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:53,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-16 12:09:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-11-16 12:09:53,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2022-11-16 12:09:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 855 states have (on average 2.642105263157895) internal successors, (2259), 869 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2259 transitions. [2022-11-16 12:09:53,879 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2259 transitions. Word has length 16 [2022-11-16 12:09:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:53,880 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 2259 transitions. [2022-11-16 12:09:53,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2259 transitions. [2022-11-16 12:09:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:53,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:53,881 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:53,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:54,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:54,093 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1720351035, now seen corresponding path program 2 times [2022-11-16 12:09:54,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:54,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437170025] [2022-11-16 12:09:54,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:54,094 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 [2022-11-16 12:09:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:54,095 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:54,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2022-11-16 12:09:54,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:54,629 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:54,630 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 [2022-11-16 12:09:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:54,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:54,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:54,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437170025] [2022-11-16 12:09:54,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437170025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:54,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:54,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314837776] [2022-11-16 12:09:54,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:54,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:54,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:54,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:54,915 INFO L87 Difference]: Start difference. First operand 870 states and 2259 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:55,099 INFO L93 Difference]: Finished difference Result 868 states and 2253 transitions. [2022-11-16 12:09:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:55,101 INFO L225 Difference]: With dead ends: 868 [2022-11-16 12:09:55,101 INFO L226 Difference]: Without dead ends: 868 [2022-11-16 12:09:55,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:55,102 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:55,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:09:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-16 12:09:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-11-16 12:09:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 853 states have (on average 2.6412661195779603) internal successors, (2253), 867 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2253 transitions. [2022-11-16 12:09:55,111 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2253 transitions. Word has length 16 [2022-11-16 12:09:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:55,111 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 2253 transitions. [2022-11-16 12:09:55,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2253 transitions. [2022-11-16 12:09:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:55,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:55,112 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:55,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:55,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:55,315 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:55,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:55,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1358537538, now seen corresponding path program 2 times [2022-11-16 12:09:55,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:55,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408708656] [2022-11-16 12:09:55,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:55,316 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 [2022-11-16 12:09:55,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:55,317 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:55,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2022-11-16 12:09:55,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:55,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:55,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:55,836 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 [2022-11-16 12:09:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:56,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:56,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:56,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408708656] [2022-11-16 12:09:56,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408708656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:56,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:56,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:56,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219499432] [2022-11-16 12:09:56,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:56,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:56,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:56,145 INFO L87 Difference]: Start difference. First operand 868 states and 2253 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:56,360 INFO L93 Difference]: Finished difference Result 867 states and 2251 transitions. [2022-11-16 12:09:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:56,362 INFO L225 Difference]: With dead ends: 867 [2022-11-16 12:09:56,362 INFO L226 Difference]: Without dead ends: 867 [2022-11-16 12:09:56,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:56,363 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:56,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-16 12:09:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-16 12:09:56,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2022-11-16 12:09:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 852 states have (on average 2.642018779342723) internal successors, (2251), 866 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2251 transitions. [2022-11-16 12:09:56,372 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2251 transitions. Word has length 16 [2022-11-16 12:09:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:56,372 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 2251 transitions. [2022-11-16 12:09:56,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2251 transitions. [2022-11-16 12:09:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:56,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:56,373 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:56,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:56,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:56,574 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1358531772, now seen corresponding path program 2 times [2022-11-16 12:09:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:56,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529415448] [2022-11-16 12:09:56,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:56,574 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 [2022-11-16 12:09:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:56,575 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:56,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-16 12:09:56,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:56,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:56,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:56,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:57,102 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:57,102 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 [2022-11-16 12:09:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:57,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:57,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529415448] [2022-11-16 12:09:57,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529415448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:57,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:57,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:57,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586245047] [2022-11-16 12:09:57,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:57,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:57,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:57,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:57,425 INFO L87 Difference]: Start difference. First operand 867 states and 2251 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:57,616 INFO L93 Difference]: Finished difference Result 866 states and 2248 transitions. [2022-11-16 12:09:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:57,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:57,618 INFO L225 Difference]: With dead ends: 866 [2022-11-16 12:09:57,618 INFO L226 Difference]: Without dead ends: 866 [2022-11-16 12:09:57,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:57,619 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:57,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-16 12:09:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-11-16 12:09:57,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-11-16 12:09:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 851 states have (on average 2.6415981198589895) internal successors, (2248), 865 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2248 transitions. [2022-11-16 12:09:57,629 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2248 transitions. Word has length 16 [2022-11-16 12:09:57,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:57,629 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 2248 transitions. [2022-11-16 12:09:57,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2248 transitions. [2022-11-16 12:09:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:57,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:57,630 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:57,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:57,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:57,831 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1358470113, now seen corresponding path program 2 times [2022-11-16 12:09:57,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:57,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802205664] [2022-11-16 12:09:57,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:57,831 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 [2022-11-16 12:09:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:57,832 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:57,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-16 12:09:58,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:58,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:58,361 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:58,361 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 [2022-11-16 12:09:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:58,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:58,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:58,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802205664] [2022-11-16 12:09:58,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802205664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:58,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:58,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:58,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064863602] [2022-11-16 12:09:58,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:58,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:58,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:58,656 INFO L87 Difference]: Start difference. First operand 866 states and 2248 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:58,824 INFO L93 Difference]: Finished difference Result 864 states and 2241 transitions. [2022-11-16 12:09:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:09:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:09:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:58,826 INFO L225 Difference]: With dead ends: 864 [2022-11-16 12:09:58,826 INFO L226 Difference]: Without dead ends: 864 [2022-11-16 12:09:58,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:09:58,826 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:58,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:09:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-11-16 12:09:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2022-11-16 12:09:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 849 states have (on average 2.639575971731449) internal successors, (2241), 863 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2241 transitions. [2022-11-16 12:09:58,836 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2241 transitions. Word has length 16 [2022-11-16 12:09:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:58,837 INFO L495 AbstractCegarLoop]: Abstraction has 864 states and 2241 transitions. [2022-11-16 12:09:58,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2241 transitions. [2022-11-16 12:09:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:09:58,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:58,838 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:58,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Ended with exit code 0 [2022-11-16 12:09:59,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:09:59,038 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:09:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:59,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1358470183, now seen corresponding path program 2 times [2022-11-16 12:09:59,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:09:59,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567675148] [2022-11-16 12:09:59,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:59,039 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 [2022-11-16 12:09:59,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:09:59,039 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:09:59,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2022-11-16 12:09:59,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:09:59,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:09:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:59,561 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:09:59,561 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 [2022-11-16 12:09:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:59,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:09:59,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:09:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567675148] [2022-11-16 12:09:59,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567675148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:59,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:59,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:09:59,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330751823] [2022-11-16 12:09:59,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:59,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:09:59,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:09:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:09:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:09:59,860 INFO L87 Difference]: Start difference. First operand 864 states and 2241 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:00,033 INFO L93 Difference]: Finished difference Result 861 states and 2230 transitions. [2022-11-16 12:10:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:00,035 INFO L225 Difference]: With dead ends: 861 [2022-11-16 12:10:00,035 INFO L226 Difference]: Without dead ends: 861 [2022-11-16 12:10:00,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:00,035 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:00,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:10:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-16 12:10:00,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-11-16 12:10:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 846 states have (on average 2.6359338061465722) internal successors, (2230), 860 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2230 transitions. [2022-11-16 12:10:00,044 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2230 transitions. Word has length 16 [2022-11-16 12:10:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:00,044 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 2230 transitions. [2022-11-16 12:10:00,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2230 transitions. [2022-11-16 12:10:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:00,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:00,045 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:00,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:00,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:00,246 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1354677821, now seen corresponding path program 2 times [2022-11-16 12:10:00,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:00,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303515949] [2022-11-16 12:10:00,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:00,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:00,247 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:00,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-16 12:10:00,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:00,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:00,767 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:00,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:10:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:01,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:01,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303515949] [2022-11-16 12:10:01,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303515949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:01,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:01,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:01,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777510782] [2022-11-16 12:10:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:01,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:01,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:01,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:01,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:01,074 INFO L87 Difference]: Start difference. First operand 861 states and 2230 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:01,247 INFO L93 Difference]: Finished difference Result 859 states and 2225 transitions. [2022-11-16 12:10:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:01,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:01,249 INFO L225 Difference]: With dead ends: 859 [2022-11-16 12:10:01,249 INFO L226 Difference]: Without dead ends: 859 [2022-11-16 12:10:01,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:01,250 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:01,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:10:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-11-16 12:10:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2022-11-16 12:10:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 844 states have (on average 2.6362559241706163) internal successors, (2225), 858 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2225 transitions. [2022-11-16 12:10:01,259 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2225 transitions. Word has length 16 [2022-11-16 12:10:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:01,259 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 2225 transitions. [2022-11-16 12:10:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2225 transitions. [2022-11-16 12:10:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:01,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:01,260 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:01,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:01,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:01,461 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1354677891, now seen corresponding path program 2 times [2022-11-16 12:10:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:01,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410788314] [2022-11-16 12:10:01,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:01,461 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 [2022-11-16 12:10:01,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:01,462 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:01,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2022-11-16 12:10:01,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:01,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:01,990 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:01,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:10:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:02,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:02,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:02,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410788314] [2022-11-16 12:10:02,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410788314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:02,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:02,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074702998] [2022-11-16 12:10:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:02,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:02,300 INFO L87 Difference]: Start difference. First operand 859 states and 2225 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:02,475 INFO L93 Difference]: Finished difference Result 856 states and 2217 transitions. [2022-11-16 12:10:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:02,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:02,477 INFO L225 Difference]: With dead ends: 856 [2022-11-16 12:10:02,477 INFO L226 Difference]: Without dead ends: 856 [2022-11-16 12:10:02,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:02,479 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:02,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:10:02,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-11-16 12:10:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 856. [2022-11-16 12:10:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 841 states have (on average 2.6361474435196195) internal successors, (2217), 855 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2217 transitions. [2022-11-16 12:10:02,489 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2217 transitions. Word has length 16 [2022-11-16 12:10:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:02,490 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 2217 transitions. [2022-11-16 12:10:02,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2217 transitions. [2022-11-16 12:10:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:02,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:02,491 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:02,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Ended with exit code 0 [2022-11-16 12:10:02,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:02,693 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:02,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1318660572, now seen corresponding path program 2 times [2022-11-16 12:10:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:02,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848438317] [2022-11-16 12:10:02,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:02,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:02,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:02,695 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:02,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-16 12:10:03,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:03,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:03,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:03,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:03,225 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:03,226 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 [2022-11-16 12:10:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:03,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:03,528 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:03,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848438317] [2022-11-16 12:10:03,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848438317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:03,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:03,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:03,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858371224] [2022-11-16 12:10:03,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:03,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:03,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:03,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:03,530 INFO L87 Difference]: Start difference. First operand 856 states and 2217 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:03,716 INFO L93 Difference]: Finished difference Result 855 states and 2214 transitions. [2022-11-16 12:10:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:03,718 INFO L225 Difference]: With dead ends: 855 [2022-11-16 12:10:03,718 INFO L226 Difference]: Without dead ends: 855 [2022-11-16 12:10:03,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:03,718 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:03,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:10:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-16 12:10:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2022-11-16 12:10:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 840 states have (on average 2.6357142857142857) internal successors, (2214), 854 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2214 transitions. [2022-11-16 12:10:03,727 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2214 transitions. Word has length 16 [2022-11-16 12:10:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:03,727 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 2214 transitions. [2022-11-16 12:10:03,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2214 transitions. [2022-11-16 12:10:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:03,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:03,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:03,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:03,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:03,929 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1004347882, now seen corresponding path program 1 times [2022-11-16 12:10:03,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:03,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503821431] [2022-11-16 12:10:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:03,930 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 [2022-11-16 12:10:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:03,930 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:03,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-16 12:10:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:04,472 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:04,473 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 [2022-11-16 12:10:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:04,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:05,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:05,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503821431] [2022-11-16 12:10:05,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503821431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:05,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:05,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:05,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983215878] [2022-11-16 12:10:05,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:05,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:05,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:05,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:05,636 INFO L87 Difference]: Start difference. First operand 855 states and 2214 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:06,176 INFO L93 Difference]: Finished difference Result 901 states and 2341 transitions. [2022-11-16 12:10:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:06,178 INFO L225 Difference]: With dead ends: 901 [2022-11-16 12:10:06,178 INFO L226 Difference]: Without dead ends: 901 [2022-11-16 12:10:06,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:06,179 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:06,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-16 12:10:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-11-16 12:10:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 860. [2022-11-16 12:10:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 845 states have (on average 2.636686390532544) internal successors, (2228), 859 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2228 transitions. [2022-11-16 12:10:06,188 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2228 transitions. Word has length 16 [2022-11-16 12:10:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:06,189 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 2228 transitions. [2022-11-16 12:10:06,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2228 transitions. [2022-11-16 12:10:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:06,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:06,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:06,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Ended with exit code 0 [2022-11-16 12:10:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:06,395 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2143825015, now seen corresponding path program 1 times [2022-11-16 12:10:06,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:06,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430566503] [2022-11-16 12:10:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:06,396 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 [2022-11-16 12:10:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:06,397 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:06,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-16 12:10:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:06,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:06,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:06,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:06,959 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 [2022-11-16 12:10:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:07,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:08,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430566503] [2022-11-16 12:10:08,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430566503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:08,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:08,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562756233] [2022-11-16 12:10:08,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:08,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:08,171 INFO L87 Difference]: Start difference. First operand 860 states and 2228 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:08,755 INFO L93 Difference]: Finished difference Result 920 states and 2407 transitions. [2022-11-16 12:10:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:08,757 INFO L225 Difference]: With dead ends: 920 [2022-11-16 12:10:08,757 INFO L226 Difference]: Without dead ends: 920 [2022-11-16 12:10:08,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:08,758 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:08,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-16 12:10:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-16 12:10:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 863. [2022-11-16 12:10:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 848 states have (on average 2.6391509433962264) internal successors, (2238), 862 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2238 transitions. [2022-11-16 12:10:08,773 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2238 transitions. Word has length 16 [2022-11-16 12:10:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:08,774 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 2238 transitions. [2022-11-16 12:10:08,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2238 transitions. [2022-11-16 12:10:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:08,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:08,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:08,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:08,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:08,988 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2145800056, now seen corresponding path program 1 times [2022-11-16 12:10:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:08,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327162455] [2022-11-16 12:10:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:08,989 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 [2022-11-16 12:10:08,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:08,990 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:08,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-16 12:10:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:09,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:09,540 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:09,541 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 [2022-11-16 12:10:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:10,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327162455] [2022-11-16 12:10:10,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327162455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:10,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:10,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592329549] [2022-11-16 12:10:10,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:10,551 INFO L87 Difference]: Start difference. First operand 863 states and 2238 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:10,780 INFO L93 Difference]: Finished difference Result 907 states and 2361 transitions. [2022-11-16 12:10:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:10:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:10,783 INFO L225 Difference]: With dead ends: 907 [2022-11-16 12:10:10,783 INFO L226 Difference]: Without dead ends: 907 [2022-11-16 12:10:10,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:10:10,783 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:10,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-11-16 12:10:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-11-16 12:10:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 864. [2022-11-16 12:10:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 849 states have (on average 2.639575971731449) internal successors, (2241), 863 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2241 transitions. [2022-11-16 12:10:10,795 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2241 transitions. Word has length 16 [2022-11-16 12:10:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:10,795 INFO L495 AbstractCegarLoop]: Abstraction has 864 states and 2241 transitions. [2022-11-16 12:10:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2241 transitions. [2022-11-16 12:10:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:10,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:10,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:10,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Ended with exit code 0 [2022-11-16 12:10:10,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:10,996 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2093958955, now seen corresponding path program 1 times [2022-11-16 12:10:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:10,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719759291] [2022-11-16 12:10:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:10,997 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 [2022-11-16 12:10:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:10,998 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:10,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-16 12:10:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:11,546 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:11,547 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 [2022-11-16 12:10:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:11,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:12,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:12,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719759291] [2022-11-16 12:10:12,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719759291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:12,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:12,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960747868] [2022-11-16 12:10:12,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:12,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:12,754 INFO L87 Difference]: Start difference. First operand 864 states and 2241 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:13,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:13,337 INFO L93 Difference]: Finished difference Result 951 states and 2496 transitions. [2022-11-16 12:10:13,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:13,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:13,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:13,339 INFO L225 Difference]: With dead ends: 951 [2022-11-16 12:10:13,340 INFO L226 Difference]: Without dead ends: 951 [2022-11-16 12:10:13,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:13,340 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:13,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-11-16 12:10:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-11-16 12:10:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 865. [2022-11-16 12:10:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 850 states have (on average 2.6411764705882352) internal successors, (2245), 864 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2245 transitions. [2022-11-16 12:10:13,353 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2245 transitions. Word has length 16 [2022-11-16 12:10:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:13,354 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 2245 transitions. [2022-11-16 12:10:13,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2245 transitions. [2022-11-16 12:10:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:13,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:13,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:13,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:13,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:13,555 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2093959008, now seen corresponding path program 1 times [2022-11-16 12:10:13,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803893183] [2022-11-16 12:10:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:13,556 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 [2022-11-16 12:10:13,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:13,557 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:13,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-16 12:10:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:13,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:14,116 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:14,117 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 [2022-11-16 12:10:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:14,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:15,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:15,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803893183] [2022-11-16 12:10:15,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803893183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:15,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:15,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385464959] [2022-11-16 12:10:15,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:15,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:15,638 INFO L87 Difference]: Start difference. First operand 865 states and 2245 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:16,360 INFO L93 Difference]: Finished difference Result 968 states and 2542 transitions. [2022-11-16 12:10:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:16,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:16,363 INFO L225 Difference]: With dead ends: 968 [2022-11-16 12:10:16,363 INFO L226 Difference]: Without dead ends: 968 [2022-11-16 12:10:16,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:16,363 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:16,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-16 12:10:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-11-16 12:10:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 868. [2022-11-16 12:10:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 853 states have (on average 2.638921453692849) internal successors, (2251), 867 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2251 transitions. [2022-11-16 12:10:16,376 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2251 transitions. Word has length 16 [2022-11-16 12:10:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:16,376 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 2251 transitions. [2022-11-16 12:10:16,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2251 transitions. [2022-11-16 12:10:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:16,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:16,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:16,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:16,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:16,578 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:16,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2088975023, now seen corresponding path program 1 times [2022-11-16 12:10:16,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:16,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816460711] [2022-11-16 12:10:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:16,578 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 [2022-11-16 12:10:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:16,579 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:16,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-16 12:10:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:16,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:17,161 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:17,161 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 [2022-11-16 12:10:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:17,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:18,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:18,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816460711] [2022-11-16 12:10:18,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816460711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:18,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:18,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:18,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942173942] [2022-11-16 12:10:18,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:18,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:18,297 INFO L87 Difference]: Start difference. First operand 868 states and 2251 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:19,185 INFO L93 Difference]: Finished difference Result 952 states and 2499 transitions. [2022-11-16 12:10:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:19,187 INFO L225 Difference]: With dead ends: 952 [2022-11-16 12:10:19,187 INFO L226 Difference]: Without dead ends: 952 [2022-11-16 12:10:19,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:19,188 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:19,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-11-16 12:10:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-11-16 12:10:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 869. [2022-11-16 12:10:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 854 states have (on average 2.6405152224824358) internal successors, (2255), 868 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2255 transitions. [2022-11-16 12:10:19,197 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2255 transitions. Word has length 16 [2022-11-16 12:10:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:19,197 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 2255 transitions. [2022-11-16 12:10:19,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2255 transitions. [2022-11-16 12:10:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:19,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:19,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:19,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Ended with exit code 0 [2022-11-16 12:10:19,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:19,399 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2088975076, now seen corresponding path program 1 times [2022-11-16 12:10:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:19,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000007700] [2022-11-16 12:10:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:19,400 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 [2022-11-16 12:10:19,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:19,401 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:19,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-16 12:10:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:19,966 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:19,967 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 [2022-11-16 12:10:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:20,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:21,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:21,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000007700] [2022-11-16 12:10:21,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000007700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:21,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:21,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:21,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010188379] [2022-11-16 12:10:21,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:21,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:21,542 INFO L87 Difference]: Start difference. First operand 869 states and 2255 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:22,149 INFO L93 Difference]: Finished difference Result 967 states and 2543 transitions. [2022-11-16 12:10:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:22,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:22,152 INFO L225 Difference]: With dead ends: 967 [2022-11-16 12:10:22,152 INFO L226 Difference]: Without dead ends: 967 [2022-11-16 12:10:22,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:22,153 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:22,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-11-16 12:10:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-16 12:10:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 870. [2022-11-16 12:10:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 855 states have (on average 2.639766081871345) internal successors, (2257), 869 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2257 transitions. [2022-11-16 12:10:22,171 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2257 transitions. Word has length 16 [2022-11-16 12:10:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:22,171 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 2257 transitions. [2022-11-16 12:10:22,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2257 transitions. [2022-11-16 12:10:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:22,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:22,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:22,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:22,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:22,386 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash 601079905, now seen corresponding path program 1 times [2022-11-16 12:10:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:22,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957403649] [2022-11-16 12:10:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:22,387 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 [2022-11-16 12:10:22,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:22,388 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:22,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-16 12:10:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:22,956 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:22,957 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 17 treesize of output 44 [2022-11-16 12:10:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:23,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:24,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:24,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957403649] [2022-11-16 12:10:24,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957403649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:24,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:24,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:24,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416184330] [2022-11-16 12:10:24,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:24,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:24,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:24,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:24,347 INFO L87 Difference]: Start difference. First operand 870 states and 2257 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:25,212 INFO L93 Difference]: Finished difference Result 965 states and 2527 transitions. [2022-11-16 12:10:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:25,214 INFO L225 Difference]: With dead ends: 965 [2022-11-16 12:10:25,214 INFO L226 Difference]: Without dead ends: 965 [2022-11-16 12:10:25,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:25,215 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:25,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-11-16 12:10:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-11-16 12:10:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 872. [2022-11-16 12:10:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 857 states have (on average 2.6382730455075847) internal successors, (2261), 871 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2261 transitions. [2022-11-16 12:10:25,227 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2261 transitions. Word has length 16 [2022-11-16 12:10:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:25,227 INFO L495 AbstractCegarLoop]: Abstraction has 872 states and 2261 transitions. [2022-11-16 12:10:25,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2261 transitions. [2022-11-16 12:10:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:25,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:25,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:25,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:25,429 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2083664670, now seen corresponding path program 1 times [2022-11-16 12:10:25,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:25,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191299946] [2022-11-16 12:10:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:25,430 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 [2022-11-16 12:10:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:25,430 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:25,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-16 12:10:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:25,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:26,013 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:26,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:10:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:26,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:27,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:27,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191299946] [2022-11-16 12:10:27,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191299946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:27,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:27,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:27,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542231810] [2022-11-16 12:10:27,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:27,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:27,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:27,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:27,207 INFO L87 Difference]: Start difference. First operand 872 states and 2261 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:28,101 INFO L93 Difference]: Finished difference Result 902 states and 2356 transitions. [2022-11-16 12:10:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:28,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:28,104 INFO L225 Difference]: With dead ends: 902 [2022-11-16 12:10:28,104 INFO L226 Difference]: Without dead ends: 902 [2022-11-16 12:10:28,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:28,104 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:28,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-16 12:10:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-16 12:10:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 875. [2022-11-16 12:10:28,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 860 states have (on average 2.640697674418605) internal successors, (2271), 874 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2271 transitions. [2022-11-16 12:10:28,116 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2271 transitions. Word has length 16 [2022-11-16 12:10:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:28,116 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 2271 transitions. [2022-11-16 12:10:28,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2271 transitions. [2022-11-16 12:10:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:28,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:28,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:28,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:28,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:28,317 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2084677564, now seen corresponding path program 1 times [2022-11-16 12:10:28,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:28,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531987439] [2022-11-16 12:10:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:28,318 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 [2022-11-16 12:10:28,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:28,319 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:28,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-16 12:10:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:28,925 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:28,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:10:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:29,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:30,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:30,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531987439] [2022-11-16 12:10:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531987439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:30,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:30,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114335699] [2022-11-16 12:10:30,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:30,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:30,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:30,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:30,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:30,151 INFO L87 Difference]: Start difference. First operand 875 states and 2271 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:30,793 INFO L93 Difference]: Finished difference Result 928 states and 2434 transitions. [2022-11-16 12:10:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:30,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:30,796 INFO L225 Difference]: With dead ends: 928 [2022-11-16 12:10:30,796 INFO L226 Difference]: Without dead ends: 928 [2022-11-16 12:10:30,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:30,796 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:30,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-16 12:10:30,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-16 12:10:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 878. [2022-11-16 12:10:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 863 states have (on average 2.6431054461181924) internal successors, (2281), 877 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2281 transitions. [2022-11-16 12:10:30,806 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2281 transitions. Word has length 16 [2022-11-16 12:10:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:30,807 INFO L495 AbstractCegarLoop]: Abstraction has 878 states and 2281 transitions. [2022-11-16 12:10:30,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2281 transitions. [2022-11-16 12:10:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:30,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:30,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:30,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:31,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:31,021 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2088469856, now seen corresponding path program 1 times [2022-11-16 12:10:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:31,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549255404] [2022-11-16 12:10:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:31,021 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 [2022-11-16 12:10:31,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:31,022 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-16 12:10:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:31,612 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:31,612 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 [2022-11-16 12:10:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:32,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:32,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549255404] [2022-11-16 12:10:32,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549255404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:32,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:32,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300794660] [2022-11-16 12:10:32,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:32,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:32,888 INFO L87 Difference]: Start difference. First operand 878 states and 2281 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:33,665 INFO L93 Difference]: Finished difference Result 910 states and 2380 transitions. [2022-11-16 12:10:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:33,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:33,668 INFO L225 Difference]: With dead ends: 910 [2022-11-16 12:10:33,668 INFO L226 Difference]: Without dead ends: 910 [2022-11-16 12:10:33,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:33,669 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:33,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-11-16 12:10:33,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-11-16 12:10:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 879. [2022-11-16 12:10:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 864 states have (on average 2.6435185185185186) internal successors, (2284), 878 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2284 transitions. [2022-11-16 12:10:33,684 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2284 transitions. Word has length 16 [2022-11-16 12:10:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:33,684 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 2284 transitions. [2022-11-16 12:10:33,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2284 transitions. [2022-11-16 12:10:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:33,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:33,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:33,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:33,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:33,886 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1033485580, now seen corresponding path program 1 times [2022-11-16 12:10:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:33,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576020768] [2022-11-16 12:10:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:33,887 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 [2022-11-16 12:10:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:33,888 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:33,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-16 12:10:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:34,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:34,479 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:34,480 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 [2022-11-16 12:10:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:34,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:36,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:36,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576020768] [2022-11-16 12:10:36,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576020768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:36,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:36,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:36,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179874932] [2022-11-16 12:10:36,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:36,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:36,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:36,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:36,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:36,023 INFO L87 Difference]: Start difference. First operand 879 states and 2284 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:36,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:36,377 INFO L93 Difference]: Finished difference Result 964 states and 2535 transitions. [2022-11-16 12:10:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:10:36,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:36,379 INFO L225 Difference]: With dead ends: 964 [2022-11-16 12:10:36,380 INFO L226 Difference]: Without dead ends: 964 [2022-11-16 12:10:36,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:10:36,380 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:36,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-16 12:10:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-11-16 12:10:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 880. [2022-11-16 12:10:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 865 states have (on average 2.645086705202312) internal successors, (2288), 879 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2288 transitions. [2022-11-16 12:10:36,398 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2288 transitions. Word has length 16 [2022-11-16 12:10:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:36,398 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 2288 transitions. [2022-11-16 12:10:36,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2288 transitions. [2022-11-16 12:10:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:36,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:36,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:36,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:36,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:36,613 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:36,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1033485650, now seen corresponding path program 1 times [2022-11-16 12:10:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:36,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171477966] [2022-11-16 12:10:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:36,616 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 [2022-11-16 12:10:36,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:36,617 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:36,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-16 12:10:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:37,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:37,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:37,224 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:37,225 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 [2022-11-16 12:10:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:37,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:38,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171477966] [2022-11-16 12:10:38,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171477966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:38,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:38,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:38,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947654386] [2022-11-16 12:10:38,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:38,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:38,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:38,511 INFO L87 Difference]: Start difference. First operand 880 states and 2288 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:39,283 INFO L93 Difference]: Finished difference Result 979 states and 2577 transitions. [2022-11-16 12:10:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:39,286 INFO L225 Difference]: With dead ends: 979 [2022-11-16 12:10:39,286 INFO L226 Difference]: Without dead ends: 979 [2022-11-16 12:10:39,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:39,287 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:39,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-16 12:10:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-11-16 12:10:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 883. [2022-11-16 12:10:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 868 states have (on average 2.642857142857143) internal successors, (2294), 882 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 2294 transitions. [2022-11-16 12:10:39,297 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 2294 transitions. Word has length 16 [2022-11-16 12:10:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:39,297 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 2294 transitions. [2022-11-16 12:10:39,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 2294 transitions. [2022-11-16 12:10:39,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:39,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:39,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:39,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:39,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:39,503 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:39,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1028084574, now seen corresponding path program 1 times [2022-11-16 12:10:39,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:39,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411739677] [2022-11-16 12:10:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:39,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:39,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:39,504 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:39,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-16 12:10:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:39,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:39,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:40,074 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:40,074 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 [2022-11-16 12:10:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:40,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:41,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:41,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411739677] [2022-11-16 12:10:41,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411739677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:41,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:41,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:41,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096252281] [2022-11-16 12:10:41,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:41,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:41,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:41,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:41,425 INFO L87 Difference]: Start difference. First operand 883 states and 2294 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:42,148 INFO L93 Difference]: Finished difference Result 963 states and 2534 transitions. [2022-11-16 12:10:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:10:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:42,150 INFO L225 Difference]: With dead ends: 963 [2022-11-16 12:10:42,150 INFO L226 Difference]: Without dead ends: 963 [2022-11-16 12:10:42,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:10:42,151 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:42,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-11-16 12:10:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-11-16 12:10:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 884. [2022-11-16 12:10:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 869 states have (on average 2.6444188722669737) internal successors, (2298), 883 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2298 transitions. [2022-11-16 12:10:42,161 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2298 transitions. Word has length 16 [2022-11-16 12:10:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:42,161 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 2298 transitions. [2022-11-16 12:10:42,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2298 transitions. [2022-11-16 12:10:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:10:42,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:42,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:42,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Ended with exit code 0 [2022-11-16 12:10:42,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:42,363 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1028084644, now seen corresponding path program 1 times [2022-11-16 12:10:42,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:42,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768045991] [2022-11-16 12:10:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:10:42,363 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 [2022-11-16 12:10:42,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:42,364 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:42,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-16 12:10:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:10:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:10:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:42,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:42,935 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 [2022-11-16 12:10:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:43,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:44,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:44,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768045991] [2022-11-16 12:10:44,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768045991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:44,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:10:44,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:10:44,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780419768] [2022-11-16 12:10:44,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:44,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:10:44,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:10:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:10:44,427 INFO L87 Difference]: Start difference. First operand 884 states and 2298 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:44,727 INFO L93 Difference]: Finished difference Result 976 states and 2574 transitions. [2022-11-16 12:10:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:10:44,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:10:44,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:44,730 INFO L225 Difference]: With dead ends: 976 [2022-11-16 12:10:44,730 INFO L226 Difference]: Without dead ends: 976 [2022-11-16 12:10:44,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:10:44,731 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:44,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-16 12:10:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-11-16 12:10:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 885. [2022-11-16 12:10:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 870 states have (on average 2.6436781609195403) internal successors, (2300), 884 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2300 transitions. [2022-11-16 12:10:44,744 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2300 transitions. Word has length 16 [2022-11-16 12:10:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:44,744 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 2300 transitions. [2022-11-16 12:10:44,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2022-11-16 12:10:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2300 transitions. [2022-11-16 12:10:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:44,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:44,745 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:44,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:44,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:44,945 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash -586450472, now seen corresponding path program 2 times [2022-11-16 12:10:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:44,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73539905] [2022-11-16 12:10:44,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:44,946 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 [2022-11-16 12:10:44,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:44,947 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:44,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-16 12:10:45,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:45,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:10:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:45,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:45,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:45,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73539905] [2022-11-16 12:10:45,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73539905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:45,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:45,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:10:45,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672360182] [2022-11-16 12:10:45,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:45,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:10:45,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:10:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:10:45,627 INFO L87 Difference]: Start difference. First operand 885 states and 2300 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-16 12:10:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:46,585 INFO L93 Difference]: Finished difference Result 889 states and 2233 transitions. [2022-11-16 12:10:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:10:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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 17 [2022-11-16 12:10:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:46,587 INFO L225 Difference]: With dead ends: 889 [2022-11-16 12:10:46,587 INFO L226 Difference]: Without dead ends: 889 [2022-11-16 12:10:46,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:10:46,588 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 129 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:46,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:10:46,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-11-16 12:10:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 868. [2022-11-16 12:10:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 853 states have (on average 2.562719812426729) internal successors, (2186), 867 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2186 transitions. [2022-11-16 12:10:46,598 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2186 transitions. Word has length 17 [2022-11-16 12:10:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:46,598 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 2186 transitions. [2022-11-16 12:10:46,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-16 12:10:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2186 transitions. [2022-11-16 12:10:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:46,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:46,599 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:46,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Ended with exit code 0 [2022-11-16 12:10:46,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:46,799 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:46,800 INFO L85 PathProgramCache]: Analyzing trace with hash 800803943, now seen corresponding path program 2 times [2022-11-16 12:10:46,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:46,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933809327] [2022-11-16 12:10:46,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:46,800 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 [2022-11-16 12:10:46,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:46,801 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:46,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-16 12:10:47,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:47,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:47,398 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:47,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:10:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:47,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:47,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:47,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933809327] [2022-11-16 12:10:47,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933809327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:47,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:47,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:47,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033934585] [2022-11-16 12:10:47,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:47,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:47,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:47,733 INFO L87 Difference]: Start difference. First operand 868 states and 2186 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:47,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:47,936 INFO L93 Difference]: Finished difference Result 867 states and 2184 transitions. [2022-11-16 12:10:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:47,938 INFO L225 Difference]: With dead ends: 867 [2022-11-16 12:10:47,938 INFO L226 Difference]: Without dead ends: 867 [2022-11-16 12:10:47,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:47,938 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:47,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-16 12:10:47,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-16 12:10:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2022-11-16 12:10:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 852 states have (on average 2.563380281690141) internal successors, (2184), 866 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2184 transitions. [2022-11-16 12:10:47,949 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2184 transitions. Word has length 17 [2022-11-16 12:10:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:47,949 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 2184 transitions. [2022-11-16 12:10:47,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2184 transitions. [2022-11-16 12:10:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:47,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:47,950 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:47,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Ended with exit code 0 [2022-11-16 12:10:48,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:48,151 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash 800964585, now seen corresponding path program 2 times [2022-11-16 12:10:48,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:48,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085525206] [2022-11-16 12:10:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:48,151 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 [2022-11-16 12:10:48,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:48,152 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:48,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-16 12:10:48,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:48,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:48,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:48,718 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:48,719 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 [2022-11-16 12:10:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:49,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:49,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:49,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085525206] [2022-11-16 12:10:49,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085525206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:49,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:49,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:49,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346428039] [2022-11-16 12:10:49,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:49,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:49,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:49,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:49,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:49,067 INFO L87 Difference]: Start difference. First operand 867 states and 2184 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:49,256 INFO L93 Difference]: Finished difference Result 865 states and 2177 transitions. [2022-11-16 12:10:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:49,258 INFO L225 Difference]: With dead ends: 865 [2022-11-16 12:10:49,258 INFO L226 Difference]: Without dead ends: 865 [2022-11-16 12:10:49,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:49,259 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:49,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:10:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-16 12:10:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2022-11-16 12:10:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 850 states have (on average 2.561176470588235) internal successors, (2177), 864 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2177 transitions. [2022-11-16 12:10:49,271 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2177 transitions. Word has length 17 [2022-11-16 12:10:49,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:49,271 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 2177 transitions. [2022-11-16 12:10:49,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2177 transitions. [2022-11-16 12:10:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:49,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:49,273 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:49,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Ended with exit code 0 [2022-11-16 12:10:49,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:49,485 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash 800964532, now seen corresponding path program 2 times [2022-11-16 12:10:49,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:49,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538605943] [2022-11-16 12:10:49,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:49,486 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 [2022-11-16 12:10:49,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:49,486 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:49,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-16 12:10:49,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:49,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:49,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:50,061 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:50,062 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 [2022-11-16 12:10:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:50,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:50,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:50,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538605943] [2022-11-16 12:10:50,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538605943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:50,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:50,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:50,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499405351] [2022-11-16 12:10:50,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:50,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:50,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:50,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:50,405 INFO L87 Difference]: Start difference. First operand 865 states and 2177 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:50,580 INFO L93 Difference]: Finished difference Result 859 states and 2158 transitions. [2022-11-16 12:10:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:50,583 INFO L225 Difference]: With dead ends: 859 [2022-11-16 12:10:50,583 INFO L226 Difference]: Without dead ends: 859 [2022-11-16 12:10:50,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:50,583 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:50,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:10:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-11-16 12:10:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2022-11-16 12:10:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 844 states have (on average 2.556872037914692) internal successors, (2158), 858 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2158 transitions. [2022-11-16 12:10:50,594 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2158 transitions. Word has length 17 [2022-11-16 12:10:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:50,594 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 2158 transitions. [2022-11-16 12:10:50,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:50,594 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2158 transitions. [2022-11-16 12:10:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:50,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:50,595 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:50,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Ended with exit code 0 [2022-11-16 12:10:50,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:50,795 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash 802731089, now seen corresponding path program 2 times [2022-11-16 12:10:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:50,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566642600] [2022-11-16 12:10:50,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:50,796 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 [2022-11-16 12:10:50,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:50,797 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:50,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-16 12:10:51,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:51,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:51,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:51,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:51,517 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:51,517 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 [2022-11-16 12:10:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:51,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:51,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:51,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566642600] [2022-11-16 12:10:51,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566642600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:51,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:51,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:51,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166515141] [2022-11-16 12:10:51,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:51,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:51,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:51,856 INFO L87 Difference]: Start difference. First operand 859 states and 2158 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:52,026 INFO L93 Difference]: Finished difference Result 857 states and 2153 transitions. [2022-11-16 12:10:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:52,028 INFO L225 Difference]: With dead ends: 857 [2022-11-16 12:10:52,028 INFO L226 Difference]: Without dead ends: 857 [2022-11-16 12:10:52,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:52,028 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:52,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:10:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-16 12:10:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 857. [2022-11-16 12:10:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 842 states have (on average 2.5570071258907365) internal successors, (2153), 856 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2153 transitions. [2022-11-16 12:10:52,038 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2153 transitions. Word has length 17 [2022-11-16 12:10:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:52,038 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 2153 transitions. [2022-11-16 12:10:52,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2153 transitions. [2022-11-16 12:10:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:52,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:52,039 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:52,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Ended with exit code 0 [2022-11-16 12:10:52,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:52,243 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:52,243 INFO L85 PathProgramCache]: Analyzing trace with hash 802731036, now seen corresponding path program 2 times [2022-11-16 12:10:52,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:52,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958888817] [2022-11-16 12:10:52,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:52,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:52,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:52,249 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:52,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Waiting until timeout for monitored process [2022-11-16 12:10:52,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:52,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:52,839 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:52,840 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 [2022-11-16 12:10:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:53,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:53,175 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958888817] [2022-11-16 12:10:53,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958888817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:53,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:53,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132977093] [2022-11-16 12:10:53,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:53,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:53,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:53,177 INFO L87 Difference]: Start difference. First operand 857 states and 2153 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:53,367 INFO L93 Difference]: Finished difference Result 848 states and 2134 transitions. [2022-11-16 12:10:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:53,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:53,369 INFO L225 Difference]: With dead ends: 848 [2022-11-16 12:10:53,369 INFO L226 Difference]: Without dead ends: 848 [2022-11-16 12:10:53,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:53,370 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:53,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:10:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-11-16 12:10:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2022-11-16 12:10:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 833 states have (on average 2.5618247298919568) internal successors, (2134), 847 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2134 transitions. [2022-11-16 12:10:53,382 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2134 transitions. Word has length 17 [2022-11-16 12:10:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:53,382 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 2134 transitions. [2022-11-16 12:10:53,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2134 transitions. [2022-11-16 12:10:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:53,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:53,384 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:53,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:53,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:53,584 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:53,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:53,585 INFO L85 PathProgramCache]: Analyzing trace with hash 749193167, now seen corresponding path program 2 times [2022-11-16 12:10:53,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:53,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397011166] [2022-11-16 12:10:53,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:53,585 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 [2022-11-16 12:10:53,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:53,586 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:53,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-16 12:10:54,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:54,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:54,154 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:54,154 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 17 treesize of output 44 [2022-11-16 12:10:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:54,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:54,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:54,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397011166] [2022-11-16 12:10:54,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397011166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:54,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:54,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:54,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550073909] [2022-11-16 12:10:54,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:54,488 INFO L87 Difference]: Start difference. First operand 848 states and 2134 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:54,672 INFO L93 Difference]: Finished difference Result 846 states and 2128 transitions. [2022-11-16 12:10:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:54,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:54,674 INFO L225 Difference]: With dead ends: 846 [2022-11-16 12:10:54,674 INFO L226 Difference]: Without dead ends: 846 [2022-11-16 12:10:54,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:54,674 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:54,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:10:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-16 12:10:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2022-11-16 12:10:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 831 states have (on average 2.5607701564380263) internal successors, (2128), 845 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2128 transitions. [2022-11-16 12:10:54,683 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2128 transitions. Word has length 17 [2022-11-16 12:10:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 2128 transitions. [2022-11-16 12:10:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2128 transitions. [2022-11-16 12:10:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:54,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:54,684 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:54,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Ended with exit code 0 [2022-11-16 12:10:54,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:54,884 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash 754177099, now seen corresponding path program 2 times [2022-11-16 12:10:54,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:54,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413992403] [2022-11-16 12:10:54,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:54,885 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 [2022-11-16 12:10:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:54,886 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:54,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-16 12:10:55,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:55,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:55,465 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:55,465 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 [2022-11-16 12:10:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:55,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:55,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:55,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413992403] [2022-11-16 12:10:55,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413992403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:55,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:55,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:55,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226973373] [2022-11-16 12:10:55,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:55,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:55,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:55,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:55,786 INFO L87 Difference]: Start difference. First operand 846 states and 2128 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:55,974 INFO L93 Difference]: Finished difference Result 844 states and 2123 transitions. [2022-11-16 12:10:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:55,976 INFO L225 Difference]: With dead ends: 844 [2022-11-16 12:10:55,976 INFO L226 Difference]: Without dead ends: 844 [2022-11-16 12:10:55,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:55,977 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:55,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:10:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-11-16 12:10:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2022-11-16 12:10:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 829 states have (on average 2.5609167671893847) internal successors, (2123), 843 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2123 transitions. [2022-11-16 12:10:55,989 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2123 transitions. Word has length 17 [2022-11-16 12:10:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:55,989 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 2123 transitions. [2022-11-16 12:10:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2123 transitions. [2022-11-16 12:10:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:55,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:55,990 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:56,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Ended with exit code 0 [2022-11-16 12:10:56,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:56,191 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1636777617, now seen corresponding path program 2 times [2022-11-16 12:10:56,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:56,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [634752763] [2022-11-16 12:10:56,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:56,191 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 [2022-11-16 12:10:56,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:56,192 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:56,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2022-11-16 12:10:56,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:56,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:56,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:56,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:56,804 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:56,804 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 [2022-11-16 12:10:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:57,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:57,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:57,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [634752763] [2022-11-16 12:10:57,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [634752763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:57,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:57,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:10:57,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119857580] [2022-11-16 12:10:57,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:57,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:10:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:10:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:10:57,161 INFO L87 Difference]: Start difference. First operand 844 states and 2123 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:57,360 INFO L93 Difference]: Finished difference Result 842 states and 2118 transitions. [2022-11-16 12:10:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:10:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:10:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:57,362 INFO L225 Difference]: With dead ends: 842 [2022-11-16 12:10:57,362 INFO L226 Difference]: Without dead ends: 842 [2022-11-16 12:10:57,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:10:57,363 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:57,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-16 12:10:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-16 12:10:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2022-11-16 12:10:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 827 states have (on average 2.5610640870616685) internal successors, (2118), 841 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2118 transitions. [2022-11-16 12:10:57,372 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2118 transitions. Word has length 17 [2022-11-16 12:10:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:57,372 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 2118 transitions. [2022-11-16 12:10:57,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:10:57,372 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2118 transitions. [2022-11-16 12:10:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:57,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:57,373 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:57,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:57,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:57,573 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash 797173488, now seen corresponding path program 2 times [2022-11-16 12:10:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:57,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57657778] [2022-11-16 12:10:57,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:57,574 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 [2022-11-16 12:10:57,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:57,575 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:57,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-16 12:10:58,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:10:58,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:10:58,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:10:58,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:10:58,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57657778] [2022-11-16 12:10:58,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57657778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:10:58,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:10:58,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:10:58,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357801976] [2022-11-16 12:10:58,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:10:58,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:10:58,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:10:58,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:10:58,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:10:58,229 INFO L87 Difference]: Start difference. First operand 842 states and 2118 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-16 12:10:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:10:59,119 INFO L93 Difference]: Finished difference Result 840 states and 2062 transitions. [2022-11-16 12:10:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:10:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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 17 [2022-11-16 12:10:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:10:59,121 INFO L225 Difference]: With dead ends: 840 [2022-11-16 12:10:59,121 INFO L226 Difference]: Without dead ends: 840 [2022-11-16 12:10:59,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:10:59,122 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:10:59,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:10:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-16 12:10:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 814. [2022-11-16 12:10:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 799 states have (on average 2.5131414267834793) internal successors, (2008), 813 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2008 transitions. [2022-11-16 12:10:59,130 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2008 transitions. Word has length 17 [2022-11-16 12:10:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:10:59,131 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 2008 transitions. [2022-11-16 12:10:59,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-16 12:10:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2008 transitions. [2022-11-16 12:10:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:10:59,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:10:59,132 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:10:59,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Forceful destruction successful, exit code 0 [2022-11-16 12:10:59,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:10:59,332 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:10:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:10:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash 835012778, now seen corresponding path program 2 times [2022-11-16 12:10:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:10:59,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082875738] [2022-11-16 12:10:59,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:10:59,333 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 [2022-11-16 12:10:59,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:10:59,334 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:10:59,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-16 12:10:59,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:10:59,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:10:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:10:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:10:59,912 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:10:59,913 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 [2022-11-16 12:11:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:00,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:00,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:00,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082875738] [2022-11-16 12:11:00,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082875738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:00,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:00,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:00,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158711521] [2022-11-16 12:11:00,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:00,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:00,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:00,251 INFO L87 Difference]: Start difference. First operand 814 states and 2008 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:00,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:00,458 INFO L93 Difference]: Finished difference Result 813 states and 2006 transitions. [2022-11-16 12:11:00,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:00,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:11:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:00,460 INFO L225 Difference]: With dead ends: 813 [2022-11-16 12:11:00,460 INFO L226 Difference]: Without dead ends: 813 [2022-11-16 12:11:00,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:00,460 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:00,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-16 12:11:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-11-16 12:11:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2022-11-16 12:11:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 798 states have (on average 2.5137844611528823) internal successors, (2006), 812 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2006 transitions. [2022-11-16 12:11:00,469 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2006 transitions. Word has length 17 [2022-11-16 12:11:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:00,469 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 2006 transitions. [2022-11-16 12:11:00,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2006 transitions. [2022-11-16 12:11:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:00,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:00,470 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:00,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Ended with exit code 0 [2022-11-16 12:11:00,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:00,670 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash 835186874, now seen corresponding path program 2 times [2022-11-16 12:11:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:00,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979628233] [2022-11-16 12:11:00,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:00,671 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 [2022-11-16 12:11:00,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:00,672 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:00,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Waiting until timeout for monitored process [2022-11-16 12:11:01,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:01,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:01,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:01,247 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 [2022-11-16 12:11:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:01,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:01,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:01,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979628233] [2022-11-16 12:11:01,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979628233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:01,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:01,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351240793] [2022-11-16 12:11:01,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:01,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:01,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:01,587 INFO L87 Difference]: Start difference. First operand 813 states and 2006 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:01,757 INFO L93 Difference]: Finished difference Result 811 states and 1999 transitions. [2022-11-16 12:11:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:11:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:01,759 INFO L225 Difference]: With dead ends: 811 [2022-11-16 12:11:01,759 INFO L226 Difference]: Without dead ends: 811 [2022-11-16 12:11:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:01,759 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:01,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-16 12:11:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 811. [2022-11-16 12:11:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 796 states have (on average 2.5113065326633164) internal successors, (1999), 810 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1999 transitions. [2022-11-16 12:11:01,771 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1999 transitions. Word has length 17 [2022-11-16 12:11:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:01,772 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1999 transitions. [2022-11-16 12:11:01,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1999 transitions. [2022-11-16 12:11:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:01,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:01,772 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:01,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:01,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:01,973 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 835186804, now seen corresponding path program 2 times [2022-11-16 12:11:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:01,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146879618] [2022-11-16 12:11:01,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:01,974 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 [2022-11-16 12:11:01,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:01,974 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:01,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Waiting until timeout for monitored process [2022-11-16 12:11:02,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:02,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:02,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:02,557 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:02,558 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 [2022-11-16 12:11:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:02,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:02,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:02,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146879618] [2022-11-16 12:11:02,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146879618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:02,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:02,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:02,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808559883] [2022-11-16 12:11:02,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:02,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:02,880 INFO L87 Difference]: Start difference. First operand 811 states and 1999 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:03,049 INFO L93 Difference]: Finished difference Result 805 states and 1980 transitions. [2022-11-16 12:11:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:11:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:03,051 INFO L225 Difference]: With dead ends: 805 [2022-11-16 12:11:03,051 INFO L226 Difference]: Without dead ends: 805 [2022-11-16 12:11:03,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:03,051 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:03,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-11-16 12:11:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2022-11-16 12:11:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 790 states have (on average 2.5063291139240507) internal successors, (1980), 804 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1980 transitions. [2022-11-16 12:11:03,061 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1980 transitions. Word has length 17 [2022-11-16 12:11:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:03,061 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1980 transitions. [2022-11-16 12:11:03,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1980 transitions. [2022-11-16 12:11:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:03,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:03,062 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:03,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:03,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:03,262 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:03,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash 837102333, now seen corresponding path program 2 times [2022-11-16 12:11:03,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:03,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344832523] [2022-11-16 12:11:03,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:03,263 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 [2022-11-16 12:11:03,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:03,264 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:03,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Waiting until timeout for monitored process [2022-11-16 12:11:03,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:03,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:03,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:03,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:03,853 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:03,854 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 [2022-11-16 12:11:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:04,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:04,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:04,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344832523] [2022-11-16 12:11:04,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344832523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:04,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:04,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021377558] [2022-11-16 12:11:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:04,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:04,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:04,193 INFO L87 Difference]: Start difference. First operand 805 states and 1980 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:04,369 INFO L93 Difference]: Finished difference Result 803 states and 1975 transitions. [2022-11-16 12:11:04,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:04,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:11:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:04,371 INFO L225 Difference]: With dead ends: 803 [2022-11-16 12:11:04,371 INFO L226 Difference]: Without dead ends: 803 [2022-11-16 12:11:04,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:04,372 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:04,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-11-16 12:11:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2022-11-16 12:11:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 788 states have (on average 2.5063451776649748) internal successors, (1975), 802 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1975 transitions. [2022-11-16 12:11:04,381 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1975 transitions. Word has length 17 [2022-11-16 12:11:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:04,381 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1975 transitions. [2022-11-16 12:11:04,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1975 transitions. [2022-11-16 12:11:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:04,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:04,382 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:04,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Ended with exit code 0 [2022-11-16 12:11:04,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:04,582 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash 837102263, now seen corresponding path program 2 times [2022-11-16 12:11:04,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:04,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580004983] [2022-11-16 12:11:04,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:04,583 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 [2022-11-16 12:11:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:04,584 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:04,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Waiting until timeout for monitored process [2022-11-16 12:11:05,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:05,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:05,200 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:05,201 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 [2022-11-16 12:11:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:05,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:05,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580004983] [2022-11-16 12:11:05,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580004983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:05,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:05,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:05,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756909050] [2022-11-16 12:11:05,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:05,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:05,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:05,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:05,531 INFO L87 Difference]: Start difference. First operand 803 states and 1975 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:05,700 INFO L93 Difference]: Finished difference Result 797 states and 1962 transitions. [2022-11-16 12:11:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:05,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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 17 [2022-11-16 12:11:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:05,702 INFO L225 Difference]: With dead ends: 797 [2022-11-16 12:11:05,702 INFO L226 Difference]: Without dead ends: 797 [2022-11-16 12:11:05,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:05,702 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:05,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-16 12:11:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 797. [2022-11-16 12:11:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 782 states have (on average 2.5089514066496164) internal successors, (1962), 796 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1962 transitions. [2022-11-16 12:11:05,711 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1962 transitions. Word has length 17 [2022-11-16 12:11:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:05,711 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1962 transitions. [2022-11-16 12:11:05,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2022-11-16 12:11:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1962 transitions. [2022-11-16 12:11:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:05,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:05,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:05,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:05,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:05,912 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash -488214779, now seen corresponding path program 1 times [2022-11-16 12:11:05,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647978252] [2022-11-16 12:11:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:05,913 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 [2022-11-16 12:11:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:05,914 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:05,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Waiting until timeout for monitored process [2022-11-16 12:11:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:06,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:11:06,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:06,525 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:06,525 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 [2022-11-16 12:11:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:06,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:07,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647978252] [2022-11-16 12:11:07,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647978252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:07,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:07,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:11:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979760385] [2022-11-16 12:11:07,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:11:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:11:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:11:07,778 INFO L87 Difference]: Start difference. First operand 797 states and 1962 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:08,035 INFO L93 Difference]: Finished difference Result 909 states and 2284 transitions. [2022-11-16 12:11:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:11:08,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:11:08,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:08,037 INFO L225 Difference]: With dead ends: 909 [2022-11-16 12:11:08,037 INFO L226 Difference]: Without dead ends: 909 [2022-11-16 12:11:08,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:11:08,037 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:08,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-16 12:11:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-16 12:11:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 798. [2022-11-16 12:11:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 783 states have (on average 2.5095785440613025) internal successors, (1965), 797 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1965 transitions. [2022-11-16 12:11:08,046 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1965 transitions. Word has length 17 [2022-11-16 12:11:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:08,046 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1965 transitions. [2022-11-16 12:11:08,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1965 transitions. [2022-11-16 12:11:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:08,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:08,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:08,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Ended with exit code 0 [2022-11-16 12:11:08,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:08,255 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -488214832, now seen corresponding path program 1 times [2022-11-16 12:11:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:08,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455126096] [2022-11-16 12:11:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:08,257 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 [2022-11-16 12:11:08,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:08,258 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:08,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Waiting until timeout for monitored process [2022-11-16 12:11:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:11:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:08,868 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:08,868 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 [2022-11-16 12:11:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:09,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:10,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455126096] [2022-11-16 12:11:10,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455126096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:10,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:10,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:11:10,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449917399] [2022-11-16 12:11:10,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:10,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:11:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:10,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:11:10,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:11:10,198 INFO L87 Difference]: Start difference. First operand 798 states and 1965 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:10,367 INFO L93 Difference]: Finished difference Result 928 states and 2336 transitions. [2022-11-16 12:11:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:11:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:11:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:10,368 INFO L225 Difference]: With dead ends: 928 [2022-11-16 12:11:10,369 INFO L226 Difference]: Without dead ends: 928 [2022-11-16 12:11:10,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:11:10,369 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:10,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-16 12:11:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-16 12:11:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 799. [2022-11-16 12:11:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 784 states have (on average 2.50765306122449) internal successors, (1966), 798 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1966 transitions. [2022-11-16 12:11:10,378 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1966 transitions. Word has length 17 [2022-11-16 12:11:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:10,378 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1966 transitions. [2022-11-16 12:11:10,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1966 transitions. [2022-11-16 12:11:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:10,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:10,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:10,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:10,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:10,592 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:10,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1973279032, now seen corresponding path program 1 times [2022-11-16 12:11:10,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:10,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286659801] [2022-11-16 12:11:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:10,592 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 [2022-11-16 12:11:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:10,594 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:10,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Waiting until timeout for monitored process [2022-11-16 12:11:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:11:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:11,221 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:11,221 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 [2022-11-16 12:11:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:11,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:12,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286659801] [2022-11-16 12:11:12,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286659801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:12,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:12,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:11:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815909302] [2022-11-16 12:11:12,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:11:12,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:11:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:11:12,509 INFO L87 Difference]: Start difference. First operand 799 states and 1966 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:13,064 INFO L93 Difference]: Finished difference Result 909 states and 2284 transitions. [2022-11-16 12:11:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:11:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:11:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:13,066 INFO L225 Difference]: With dead ends: 909 [2022-11-16 12:11:13,066 INFO L226 Difference]: Without dead ends: 909 [2022-11-16 12:11:13,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:11:13,067 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:13,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-11-16 12:11:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-16 12:11:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 800. [2022-11-16 12:11:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 785 states have (on average 2.50828025477707) internal successors, (1969), 799 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1969 transitions. [2022-11-16 12:11:13,076 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1969 transitions. Word has length 17 [2022-11-16 12:11:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:13,076 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1969 transitions. [2022-11-16 12:11:13,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1969 transitions. [2022-11-16 12:11:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:11:13,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:13,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:13,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:13,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:13,290 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:13,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:13,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1973279102, now seen corresponding path program 1 times [2022-11-16 12:11:13,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:13,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974704651] [2022-11-16 12:11:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:13,291 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 [2022-11-16 12:11:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:13,292 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:13,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Waiting until timeout for monitored process [2022-11-16 12:11:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:13,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:11:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:13,908 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:13,908 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 [2022-11-16 12:11:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:14,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:15,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974704651] [2022-11-16 12:11:15,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974704651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:15,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:15,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:11:15,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922279676] [2022-11-16 12:11:15,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:15,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:11:15,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:11:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:11:15,098 INFO L87 Difference]: Start difference. First operand 800 states and 1969 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:15,812 INFO L93 Difference]: Finished difference Result 926 states and 2332 transitions. [2022-11-16 12:11:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:11:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:11:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:15,814 INFO L225 Difference]: With dead ends: 926 [2022-11-16 12:11:15,814 INFO L226 Difference]: Without dead ends: 926 [2022-11-16 12:11:15,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:11:15,814 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:15,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-11-16 12:11:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-16 12:11:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 801. [2022-11-16 12:11:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 786 states have (on average 2.5063613231552164) internal successors, (1970), 800 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1970 transitions. [2022-11-16 12:11:15,824 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1970 transitions. Word has length 17 [2022-11-16 12:11:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:15,824 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1970 transitions. [2022-11-16 12:11:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1970 transitions. [2022-11-16 12:11:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:15,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:15,825 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:15,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:16,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:16,026 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:16,026 INFO L85 PathProgramCache]: Analyzing trace with hash -944882187, now seen corresponding path program 2 times [2022-11-16 12:11:16,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:16,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002308822] [2022-11-16 12:11:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:16,026 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 [2022-11-16 12:11:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:16,027 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:16,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Waiting until timeout for monitored process [2022-11-16 12:11:16,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:16,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:16,656 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:16,656 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 [2022-11-16 12:11:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:17,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:17,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:17,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002308822] [2022-11-16 12:11:17,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002308822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:17,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:17,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440106962] [2022-11-16 12:11:17,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:17,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:17,008 INFO L87 Difference]: Start difference. First operand 801 states and 1970 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:17,176 INFO L93 Difference]: Finished difference Result 799 states and 1965 transitions. [2022-11-16 12:11:17,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:17,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:17,178 INFO L225 Difference]: With dead ends: 799 [2022-11-16 12:11:17,178 INFO L226 Difference]: Without dead ends: 799 [2022-11-16 12:11:17,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:17,179 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:17,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-11-16 12:11:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 799. [2022-11-16 12:11:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 784 states have (on average 2.506377551020408) internal successors, (1965), 798 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1965 transitions. [2022-11-16 12:11:17,189 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1965 transitions. Word has length 18 [2022-11-16 12:11:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:17,189 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1965 transitions. [2022-11-16 12:11:17,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1965 transitions. [2022-11-16 12:11:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:17,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:17,190 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:17,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Ended with exit code 0 [2022-11-16 12:11:17,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:17,391 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -944882240, now seen corresponding path program 2 times [2022-11-16 12:11:17,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:17,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627026325] [2022-11-16 12:11:17,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:17,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:17,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:17,392 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:17,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Waiting until timeout for monitored process [2022-11-16 12:11:17,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:17,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:17,987 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:17,987 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 [2022-11-16 12:11:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:18,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:18,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:18,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627026325] [2022-11-16 12:11:18,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627026325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:18,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:18,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:18,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363981618] [2022-11-16 12:11:18,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:18,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:18,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:18,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:18,389 INFO L87 Difference]: Start difference. First operand 799 states and 1965 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:18,578 INFO L93 Difference]: Finished difference Result 788 states and 1941 transitions. [2022-11-16 12:11:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:18,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:18,580 INFO L225 Difference]: With dead ends: 788 [2022-11-16 12:11:18,580 INFO L226 Difference]: Without dead ends: 788 [2022-11-16 12:11:18,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:18,581 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:18,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-16 12:11:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 788. [2022-11-16 12:11:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 773 states have (on average 2.5109961190168177) internal successors, (1941), 787 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1941 transitions. [2022-11-16 12:11:18,591 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1941 transitions. Word has length 18 [2022-11-16 12:11:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:18,591 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1941 transitions. [2022-11-16 12:11:18,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1941 transitions. [2022-11-16 12:11:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:18,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:18,592 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:18,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Ended with exit code 0 [2022-11-16 12:11:18,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:18,793 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -939898255, now seen corresponding path program 2 times [2022-11-16 12:11:18,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:18,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527368496] [2022-11-16 12:11:18,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:18,793 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 [2022-11-16 12:11:18,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:18,794 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:18,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Waiting until timeout for monitored process [2022-11-16 12:11:19,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:19,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:19,440 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:19,440 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 [2022-11-16 12:11:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:19,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:19,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:19,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527368496] [2022-11-16 12:11:19,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527368496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:19,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:19,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:19,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463854705] [2022-11-16 12:11:19,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:19,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:19,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:19,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:19,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:19,796 INFO L87 Difference]: Start difference. First operand 788 states and 1941 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:19,970 INFO L93 Difference]: Finished difference Result 786 states and 1936 transitions. [2022-11-16 12:11:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:19,972 INFO L225 Difference]: With dead ends: 786 [2022-11-16 12:11:19,972 INFO L226 Difference]: Without dead ends: 786 [2022-11-16 12:11:19,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:19,973 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:19,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-11-16 12:11:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-11-16 12:11:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 771 states have (on average 2.511024643320363) internal successors, (1936), 785 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1936 transitions. [2022-11-16 12:11:19,985 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1936 transitions. Word has length 18 [2022-11-16 12:11:19,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:19,985 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1936 transitions. [2022-11-16 12:11:19,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1936 transitions. [2022-11-16 12:11:19,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:19,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:19,987 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:20,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:20,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:20,200 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash -939898308, now seen corresponding path program 2 times [2022-11-16 12:11:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:20,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773300409] [2022-11-16 12:11:20,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:20,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:20,201 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:20,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Waiting until timeout for monitored process [2022-11-16 12:11:20,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:20,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:20,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:20,810 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:20,810 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 [2022-11-16 12:11:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:21,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:21,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:21,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773300409] [2022-11-16 12:11:21,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773300409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:21,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:21,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:21,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395052827] [2022-11-16 12:11:21,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:21,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:21,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:21,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:21,171 INFO L87 Difference]: Start difference. First operand 786 states and 1936 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:21,343 INFO L93 Difference]: Finished difference Result 777 states and 1917 transitions. [2022-11-16 12:11:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:21,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:21,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:21,345 INFO L225 Difference]: With dead ends: 777 [2022-11-16 12:11:21,345 INFO L226 Difference]: Without dead ends: 777 [2022-11-16 12:11:21,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:21,345 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:21,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-16 12:11:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 777. [2022-11-16 12:11:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 762 states have (on average 2.515748031496063) internal successors, (1917), 776 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1917 transitions. [2022-11-16 12:11:21,354 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1917 transitions. Word has length 18 [2022-11-16 12:11:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:21,354 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1917 transitions. [2022-11-16 12:11:21,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1917 transitions. [2022-11-16 12:11:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:21,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:21,355 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:21,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:21,556 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1750156673, now seen corresponding path program 2 times [2022-11-16 12:11:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:21,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625740207] [2022-11-16 12:11:21,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:21,556 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 [2022-11-16 12:11:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:21,557 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:21,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (211)] Waiting until timeout for monitored process [2022-11-16 12:11:22,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:22,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:22,159 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:22,160 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 [2022-11-16 12:11:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:22,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:22,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:22,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625740207] [2022-11-16 12:11:22,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625740207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:22,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:22,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517706745] [2022-11-16 12:11:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:22,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:22,518 INFO L87 Difference]: Start difference. First operand 777 states and 1917 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:22,688 INFO L93 Difference]: Finished difference Result 775 states and 1913 transitions. [2022-11-16 12:11:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:22,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:22,690 INFO L225 Difference]: With dead ends: 775 [2022-11-16 12:11:22,690 INFO L226 Difference]: Without dead ends: 775 [2022-11-16 12:11:22,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:22,691 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:22,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:22,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-16 12:11:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-11-16 12:11:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 760 states have (on average 2.517105263157895) internal successors, (1913), 774 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1913 transitions. [2022-11-16 12:11:22,699 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1913 transitions. Word has length 18 [2022-11-16 12:11:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:22,699 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1913 transitions. [2022-11-16 12:11:22,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1913 transitions. [2022-11-16 12:11:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:22,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:22,700 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:22,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (211)] Ended with exit code 0 [2022-11-16 12:11:22,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:22,900 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash 115591188, now seen corresponding path program 2 times [2022-11-16 12:11:22,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:22,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838323538] [2022-11-16 12:11:22,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:22,901 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 [2022-11-16 12:11:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:22,902 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:22,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Waiting until timeout for monitored process [2022-11-16 12:11:23,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:23,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:23,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:23,526 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:23,527 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 [2022-11-16 12:11:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:23,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:23,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:23,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838323538] [2022-11-16 12:11:23,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838323538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:23,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:23,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:23,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814185147] [2022-11-16 12:11:23,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:23,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:23,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:23,873 INFO L87 Difference]: Start difference. First operand 775 states and 1913 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:24,046 INFO L93 Difference]: Finished difference Result 773 states and 1908 transitions. [2022-11-16 12:11:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:24,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:24,047 INFO L225 Difference]: With dead ends: 773 [2022-11-16 12:11:24,047 INFO L226 Difference]: Without dead ends: 773 [2022-11-16 12:11:24,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:24,048 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:24,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-11-16 12:11:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 773. [2022-11-16 12:11:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 758 states have (on average 2.5171503957783643) internal successors, (1908), 772 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1908 transitions. [2022-11-16 12:11:24,056 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1908 transitions. Word has length 18 [2022-11-16 12:11:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:24,056 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1908 transitions. [2022-11-16 12:11:24,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1908 transitions. [2022-11-16 12:11:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:24,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:24,057 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:24,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Ended with exit code 0 [2022-11-16 12:11:24,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:24,257 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:24,258 INFO L85 PathProgramCache]: Analyzing trace with hash 115591118, now seen corresponding path program 2 times [2022-11-16 12:11:24,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099631827] [2022-11-16 12:11:24,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:24,258 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 [2022-11-16 12:11:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:24,259 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:24,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (213)] Waiting until timeout for monitored process [2022-11-16 12:11:24,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:24,880 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:24,880 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 17 treesize of output 44 [2022-11-16 12:11:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:25,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:25,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:25,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099631827] [2022-11-16 12:11:25,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099631827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:25,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:25,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:25,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998187092] [2022-11-16 12:11:25,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:25,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:25,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:25,233 INFO L87 Difference]: Start difference. First operand 773 states and 1908 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:25,404 INFO L93 Difference]: Finished difference Result 761 states and 1883 transitions. [2022-11-16 12:11:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:25,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:25,406 INFO L225 Difference]: With dead ends: 761 [2022-11-16 12:11:25,406 INFO L226 Difference]: Without dead ends: 761 [2022-11-16 12:11:25,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:25,406 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:25,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:25,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-11-16 12:11:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 761. [2022-11-16 12:11:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 746 states have (on average 2.5241286863270775) internal successors, (1883), 760 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1883 transitions. [2022-11-16 12:11:25,415 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1883 transitions. Word has length 18 [2022-11-16 12:11:25,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:25,415 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 1883 transitions. [2022-11-16 12:11:25,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:25,415 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1883 transitions. [2022-11-16 12:11:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:25,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:25,416 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:25,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (213)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:25,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:25,616 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:25,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:25,616 INFO L85 PathProgramCache]: Analyzing trace with hash 120992194, now seen corresponding path program 2 times [2022-11-16 12:11:25,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:25,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324622238] [2022-11-16 12:11:25,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:25,617 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 [2022-11-16 12:11:25,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:25,618 INFO L229 MonitoredProcess]: Starting monitored process 214 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:25,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Waiting until timeout for monitored process [2022-11-16 12:11:26,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:26,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:26,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:26,274 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:26,274 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 [2022-11-16 12:11:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:26,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:26,653 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:26,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324622238] [2022-11-16 12:11:26,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324622238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:26,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:26,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:26,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219631307] [2022-11-16 12:11:26,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:26,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:26,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:26,655 INFO L87 Difference]: Start difference. First operand 761 states and 1883 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:26,841 INFO L93 Difference]: Finished difference Result 759 states and 1878 transitions. [2022-11-16 12:11:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:26,843 INFO L225 Difference]: With dead ends: 759 [2022-11-16 12:11:26,843 INFO L226 Difference]: Without dead ends: 759 [2022-11-16 12:11:26,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:26,843 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:26,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-11-16 12:11:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 759. [2022-11-16 12:11:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 744 states have (on average 2.524193548387097) internal successors, (1878), 758 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1878 transitions. [2022-11-16 12:11:26,852 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1878 transitions. Word has length 18 [2022-11-16 12:11:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:26,852 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1878 transitions. [2022-11-16 12:11:26,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1878 transitions. [2022-11-16 12:11:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:11:26,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:26,853 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:26,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Ended with exit code 0 [2022-11-16 12:11:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:27,053 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:27,054 INFO L85 PathProgramCache]: Analyzing trace with hash 120992124, now seen corresponding path program 2 times [2022-11-16 12:11:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:27,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381930807] [2022-11-16 12:11:27,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:27,054 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 [2022-11-16 12:11:27,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:27,055 INFO L229 MonitoredProcess]: Starting monitored process 215 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:27,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Waiting until timeout for monitored process [2022-11-16 12:11:27,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:27,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:27,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:27,672 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:27,672 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 [2022-11-16 12:11:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:28,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:28,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381930807] [2022-11-16 12:11:28,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381930807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:28,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:28,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186664232] [2022-11-16 12:11:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:28,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:28,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:28,029 INFO L87 Difference]: Start difference. First operand 759 states and 1878 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:28,206 INFO L93 Difference]: Finished difference Result 753 states and 1865 transitions. [2022-11-16 12:11:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:28,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 18 [2022-11-16 12:11:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:28,208 INFO L225 Difference]: With dead ends: 753 [2022-11-16 12:11:28,208 INFO L226 Difference]: Without dead ends: 753 [2022-11-16 12:11:28,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:28,208 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:28,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-16 12:11:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2022-11-16 12:11:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 738 states have (on average 2.52710027100271) internal successors, (1865), 752 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1865 transitions. [2022-11-16 12:11:28,217 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1865 transitions. Word has length 18 [2022-11-16 12:11:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:28,217 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 1865 transitions. [2022-11-16 12:11:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-16 12:11:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1865 transitions. [2022-11-16 12:11:28,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:28,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:28,218 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:28,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Ended with exit code 0 [2022-11-16 12:11:28,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:28,418 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:28,419 INFO L85 PathProgramCache]: Analyzing trace with hash 773426661, now seen corresponding path program 2 times [2022-11-16 12:11:28,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:28,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785419514] [2022-11-16 12:11:28,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:28,419 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 [2022-11-16 12:11:28,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:28,420 INFO L229 MonitoredProcess]: Starting monitored process 216 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:28,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Waiting until timeout for monitored process [2022-11-16 12:11:28,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:28,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:29,057 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:29,057 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 [2022-11-16 12:11:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:29,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:29,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:29,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785419514] [2022-11-16 12:11:29,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785419514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:29,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:29,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:29,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78303565] [2022-11-16 12:11:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:29,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:29,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:29,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:29,449 INFO L87 Difference]: Start difference. First operand 753 states and 1865 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:29,627 INFO L93 Difference]: Finished difference Result 751 states and 1862 transitions. [2022-11-16 12:11:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:11:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:29,629 INFO L225 Difference]: With dead ends: 751 [2022-11-16 12:11:29,629 INFO L226 Difference]: Without dead ends: 751 [2022-11-16 12:11:29,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:29,630 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:29,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-16 12:11:29,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-16 12:11:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 737 states have (on average 2.5264586160108546) internal successors, (1862), 750 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1862 transitions. [2022-11-16 12:11:29,638 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1862 transitions. Word has length 19 [2022-11-16 12:11:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:29,638 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 1862 transitions. [2022-11-16 12:11:29,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1862 transitions. [2022-11-16 12:11:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:29,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:29,639 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:29,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Ended with exit code 0 [2022-11-16 12:11:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:29,840 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 773426608, now seen corresponding path program 2 times [2022-11-16 12:11:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:29,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458750093] [2022-11-16 12:11:29,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:29,841 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 [2022-11-16 12:11:29,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:29,841 INFO L229 MonitoredProcess]: Starting monitored process 217 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:29,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (217)] Waiting until timeout for monitored process [2022-11-16 12:11:30,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:30,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:30,474 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:30,474 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 [2022-11-16 12:11:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:30,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:30,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458750093] [2022-11-16 12:11:30,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458750093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:30,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:30,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960174412] [2022-11-16 12:11:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:30,843 INFO L87 Difference]: Start difference. First operand 751 states and 1862 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:31,024 INFO L93 Difference]: Finished difference Result 722 states and 1813 transitions. [2022-11-16 12:11:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:11:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:31,026 INFO L225 Difference]: With dead ends: 722 [2022-11-16 12:11:31,026 INFO L226 Difference]: Without dead ends: 722 [2022-11-16 12:11:31,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:31,026 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:31,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:11:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-11-16 12:11:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 636. [2022-11-16 12:11:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 625 states have (on average 2.5056) internal successors, (1566), 635 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1566 transitions. [2022-11-16 12:11:31,034 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1566 transitions. Word has length 19 [2022-11-16 12:11:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:31,034 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 1566 transitions. [2022-11-16 12:11:31,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1566 transitions. [2022-11-16 12:11:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:31,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:31,035 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:31,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (217)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:31,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:31,235 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash -711637592, now seen corresponding path program 2 times [2022-11-16 12:11:31,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:31,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976368251] [2022-11-16 12:11:31,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:31,236 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 [2022-11-16 12:11:31,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:31,236 INFO L229 MonitoredProcess]: Starting monitored process 218 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:31,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Waiting until timeout for monitored process [2022-11-16 12:11:31,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:31,858 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:31,859 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 [2022-11-16 12:11:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:32,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:32,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:32,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976368251] [2022-11-16 12:11:32,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976368251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:32,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:32,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:32,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37010632] [2022-11-16 12:11:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:32,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:32,231 INFO L87 Difference]: Start difference. First operand 636 states and 1566 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:32,397 INFO L93 Difference]: Finished difference Result 634 states and 1563 transitions. [2022-11-16 12:11:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:32,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:11:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:32,399 INFO L225 Difference]: With dead ends: 634 [2022-11-16 12:11:32,399 INFO L226 Difference]: Without dead ends: 634 [2022-11-16 12:11:32,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:32,399 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:32,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-16 12:11:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-16 12:11:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 634. [2022-11-16 12:11:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 624 states have (on average 2.5048076923076925) internal successors, (1563), 633 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1563 transitions. [2022-11-16 12:11:32,406 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1563 transitions. Word has length 19 [2022-11-16 12:11:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:32,406 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 1563 transitions. [2022-11-16 12:11:32,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1563 transitions. [2022-11-16 12:11:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:32,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:32,407 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:32,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:32,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:32,608 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash -711637662, now seen corresponding path program 2 times [2022-11-16 12:11:32,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:32,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825716452] [2022-11-16 12:11:32,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:32,608 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 [2022-11-16 12:11:32,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:32,609 INFO L229 MonitoredProcess]: Starting monitored process 219 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:32,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (219)] Waiting until timeout for monitored process [2022-11-16 12:11:33,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:33,228 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:33,228 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 [2022-11-16 12:11:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:11:33,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:33,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:33,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825716452] [2022-11-16 12:11:33,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825716452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:33,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:33,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:33,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185839732] [2022-11-16 12:11:33,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:33,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:33,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:33,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:33,616 INFO L87 Difference]: Start difference. First operand 634 states and 1563 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:33,780 INFO L93 Difference]: Finished difference Result 617 states and 1545 transitions. [2022-11-16 12:11:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:11:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:11:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:33,781 INFO L225 Difference]: With dead ends: 617 [2022-11-16 12:11:33,781 INFO L226 Difference]: Without dead ends: 617 [2022-11-16 12:11:33,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:33,781 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:33,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-16 12:11:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-16 12:11:33,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 542. [2022-11-16 12:11:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 536 states have (on average 2.4738805970149254) internal successors, (1326), 541 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1326 transitions. [2022-11-16 12:11:33,787 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1326 transitions. Word has length 19 [2022-11-16 12:11:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:33,787 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 1326 transitions. [2022-11-16 12:11:33,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1326 transitions. [2022-11-16 12:11:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:33,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:33,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:33,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (219)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:33,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:33,989 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -687099377, now seen corresponding path program 1 times [2022-11-16 12:11:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:33,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269440456] [2022-11-16 12:11:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:33,989 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 [2022-11-16 12:11:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:33,990 INFO L229 MonitoredProcess]: Starting monitored process 220 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:34,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Waiting until timeout for monitored process [2022-11-16 12:11:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:11:34,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:34,639 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:34,640 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 [2022-11-16 12:11:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:35,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:36,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:36,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269440456] [2022-11-16 12:11:36,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269440456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:36,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:36,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:11:36,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991006920] [2022-11-16 12:11:36,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:36,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:11:36,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:11:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:11:36,411 INFO L87 Difference]: Start difference. First operand 542 states and 1326 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2022-11-16 12:11:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:40,732 INFO L93 Difference]: Finished difference Result 1495 states and 3786 transitions. [2022-11-16 12:11:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:11:40,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 19 [2022-11-16 12:11:40,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:40,735 INFO L225 Difference]: With dead ends: 1495 [2022-11-16 12:11:40,735 INFO L226 Difference]: Without dead ends: 1495 [2022-11-16 12:11:40,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:11:40,736 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 116 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:40,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 11 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 0 Unknown, 392 Unchecked, 1.0s Time] [2022-11-16 12:11:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-11-16 12:11:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 946. [2022-11-16 12:11:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 940 states have (on average 2.525531914893617) internal successors, (2374), 945 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2374 transitions. [2022-11-16 12:11:40,751 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2374 transitions. Word has length 19 [2022-11-16 12:11:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:40,751 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 2374 transitions. [2022-11-16 12:11:40,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2022-11-16 12:11:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2374 transitions. [2022-11-16 12:11:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:40,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:40,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:40,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:40,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:40,965 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -623944584, now seen corresponding path program 1 times [2022-11-16 12:11:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:40,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041424916] [2022-11-16 12:11:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:40,966 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 [2022-11-16 12:11:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:40,966 INFO L229 MonitoredProcess]: Starting monitored process 221 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:40,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Waiting until timeout for monitored process [2022-11-16 12:11:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:11:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:11:41,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:41,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:41,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041424916] [2022-11-16 12:11:41,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041424916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:41,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:41,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:11:41,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231347207] [2022-11-16 12:11:41,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:41,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:11:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:11:41,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:41,547 INFO L87 Difference]: Start difference. First operand 946 states and 2374 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:41,723 INFO L93 Difference]: Finished difference Result 926 states and 2326 transitions. [2022-11-16 12:11:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:11:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:11:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:41,725 INFO L225 Difference]: With dead ends: 926 [2022-11-16 12:11:41,725 INFO L226 Difference]: Without dead ends: 926 [2022-11-16 12:11:41,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:11:41,726 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:41,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:11:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-16 12:11:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2022-11-16 12:11:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 922 states have (on average 2.522776572668113) internal successors, (2326), 925 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2326 transitions. [2022-11-16 12:11:41,735 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2326 transitions. Word has length 19 [2022-11-16 12:11:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:41,736 INFO L495 AbstractCegarLoop]: Abstraction has 926 states and 2326 transitions. [2022-11-16 12:11:41,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2326 transitions. [2022-11-16 12:11:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:41,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:41,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:41,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:41,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:41,937 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:41,938 INFO L85 PathProgramCache]: Analyzing trace with hash -221264943, now seen corresponding path program 2 times [2022-11-16 12:11:41,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:41,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056609974] [2022-11-16 12:11:41,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:11:41,938 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 [2022-11-16 12:11:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:41,939 INFO L229 MonitoredProcess]: Starting monitored process 222 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:41,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Waiting until timeout for monitored process [2022-11-16 12:11:42,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:11:42,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:42,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:42,598 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:42,598 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 [2022-11-16 12:11:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:11:42,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:42,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:42,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056609974] [2022-11-16 12:11:42,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056609974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:42,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:42,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:11:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938956020] [2022-11-16 12:11:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:42,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:11:42,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:42,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:11:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:42,964 INFO L87 Difference]: Start difference. First operand 926 states and 2326 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:43,369 INFO L93 Difference]: Finished difference Result 994 states and 2476 transitions. [2022-11-16 12:11:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:11:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:11:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:43,371 INFO L225 Difference]: With dead ends: 994 [2022-11-16 12:11:43,372 INFO L226 Difference]: Without dead ends: 994 [2022-11-16 12:11:43,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:43,372 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 45 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:43,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 4 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-11-16 12:11:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-11-16 12:11:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 926. [2022-11-16 12:11:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 922 states have (on average 2.5390455531453364) internal successors, (2341), 925 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2341 transitions. [2022-11-16 12:11:43,382 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2341 transitions. Word has length 19 [2022-11-16 12:11:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:43,382 INFO L495 AbstractCegarLoop]: Abstraction has 926 states and 2341 transitions. [2022-11-16 12:11:43,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2341 transitions. [2022-11-16 12:11:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:43,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:43,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:43,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Ended with exit code 0 [2022-11-16 12:11:43,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:43,584 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1648094479, now seen corresponding path program 3 times [2022-11-16 12:11:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:43,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669619921] [2022-11-16 12:11:43,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:11:43,585 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 [2022-11-16 12:11:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:43,585 INFO L229 MonitoredProcess]: Starting monitored process 223 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:43,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (223)] Waiting until timeout for monitored process [2022-11-16 12:11:44,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:11:44,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:11:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:44,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:44,238 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 [2022-11-16 12:11:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:11:44,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:11:44,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669619921] [2022-11-16 12:11:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669619921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:11:44,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:11:44,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:11:44,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715408610] [2022-11-16 12:11:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:11:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:11:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:11:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:11:44,611 INFO L87 Difference]: Start difference. First operand 926 states and 2341 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:44,991 INFO L93 Difference]: Finished difference Result 1106 states and 2754 transitions. [2022-11-16 12:11:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:11:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:11:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:44,994 INFO L225 Difference]: With dead ends: 1106 [2022-11-16 12:11:44,994 INFO L226 Difference]: Without dead ends: 1106 [2022-11-16 12:11:44,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:11:44,994 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:44,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 4 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-11-16 12:11:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-16 12:11:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 975. [2022-11-16 12:11:45,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 971 states have (on average 2.533470648815654) internal successors, (2460), 974 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2460 transitions. [2022-11-16 12:11:45,005 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2460 transitions. Word has length 19 [2022-11-16 12:11:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:45,006 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 2460 transitions. [2022-11-16 12:11:45,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2460 transitions. [2022-11-16 12:11:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:11:45,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:45,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:45,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (223)] Forceful destruction successful, exit code 0 [2022-11-16 12:11:45,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:45,207 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:45,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash 48085327, now seen corresponding path program 4 times [2022-11-16 12:11:45,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:45,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017722496] [2022-11-16 12:11:45,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:11:45,208 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 [2022-11-16 12:11:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:45,209 INFO L229 MonitoredProcess]: Starting monitored process 224 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:45,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Waiting until timeout for monitored process [2022-11-16 12:11:45,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:11:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:11:45,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:11:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:45,921 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:45,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:11:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:46,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:48,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:48,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017722496] [2022-11-16 12:11:48,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017722496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:48,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:48,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:11:48,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605873583] [2022-11-16 12:11:48,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:11:48,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:11:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:11:48,038 INFO L87 Difference]: Start difference. First operand 975 states and 2460 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2022-11-16 12:11:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:11:49,780 INFO L93 Difference]: Finished difference Result 1695 states and 4261 transitions. [2022-11-16 12:11:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:11:49,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 19 [2022-11-16 12:11:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:11:49,784 INFO L225 Difference]: With dead ends: 1695 [2022-11-16 12:11:49,784 INFO L226 Difference]: Without dead ends: 1695 [2022-11-16 12:11:49,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:11:49,784 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:11:49,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 10 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 325 Unchecked, 1.0s Time] [2022-11-16 12:11:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-11-16 12:11:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1002. [2022-11-16 12:11:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 998 states have (on average 2.5440881763527052) internal successors, (2539), 1001 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:11:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2539 transitions. [2022-11-16 12:11:49,800 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2539 transitions. Word has length 19 [2022-11-16 12:11:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:11:49,801 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 2539 transitions. [2022-11-16 12:11:49,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2022-11-16 12:11:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2539 transitions. [2022-11-16 12:11:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:11:49,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:11:49,802 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:11:49,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Ended with exit code 0 [2022-11-16 12:11:50,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:11:50,003 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:11:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:11:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash -967248198, now seen corresponding path program 1 times [2022-11-16 12:11:50,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:11:50,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425259437] [2022-11-16 12:11:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:11:50,003 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 [2022-11-16 12:11:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:11:50,004 INFO L229 MonitoredProcess]: Starting monitored process 225 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:11:50,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (225)] Waiting until timeout for monitored process [2022-11-16 12:11:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:11:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:11:50,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:11:50,711 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:11:50,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:11:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:51,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:11:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:11:53,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:11:53,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425259437] [2022-11-16 12:11:53,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425259437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:11:53,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:11:53,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:11:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565987369] [2022-11-16 12:11:53,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:11:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:11:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:11:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:11:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:11:53,818 INFO L87 Difference]: Start difference. First operand 1002 states and 2539 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:01,258 INFO L93 Difference]: Finished difference Result 1045 states and 2643 transitions. [2022-11-16 12:12:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:12:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2022-11-16 12:12:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:01,261 INFO L225 Difference]: With dead ends: 1045 [2022-11-16 12:12:01,261 INFO L226 Difference]: Without dead ends: 1045 [2022-11-16 12:12:01,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:12:01,262 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:01,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 157 Unchecked, 0.7s Time] [2022-11-16 12:12:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-11-16 12:12:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1021. [2022-11-16 12:12:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1017 states have (on average 2.5427728613569323) internal successors, (2586), 1020 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2586 transitions. [2022-11-16 12:12:01,287 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2586 transitions. Word has length 20 [2022-11-16 12:12:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:01,288 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 2586 transitions. [2022-11-16 12:12:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2586 transitions. [2022-11-16 12:12:01,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:12:01,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:01,289 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:01,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (225)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:01,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:01,489 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 414465426, now seen corresponding path program 2 times [2022-11-16 12:12:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:01,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180237862] [2022-11-16 12:12:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:12:01,491 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 [2022-11-16 12:12:01,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:01,492 INFO L229 MonitoredProcess]: Starting monitored process 226 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:01,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (226)] Waiting until timeout for monitored process [2022-11-16 12:12:01,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:12:01,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:01,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:12:01,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:02,184 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:02,184 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 [2022-11-16 12:12:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:12:02,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:12:02,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:02,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180237862] [2022-11-16 12:12:02,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180237862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:02,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:02,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:12:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568000964] [2022-11-16 12:12:02,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:02,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:12:02,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:12:02,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:12:02,601 INFO L87 Difference]: Start difference. First operand 1021 states and 2586 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:03,042 INFO L93 Difference]: Finished difference Result 1144 states and 2862 transitions. [2022-11-16 12:12:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:12:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:12:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:03,044 INFO L225 Difference]: With dead ends: 1144 [2022-11-16 12:12:03,044 INFO L226 Difference]: Without dead ends: 1144 [2022-11-16 12:12:03,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:03,045 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:03,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-11-16 12:12:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-11-16 12:12:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1034. [2022-11-16 12:12:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1030 states have (on average 2.5563106796116504) internal successors, (2633), 1033 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2633 transitions. [2022-11-16 12:12:03,064 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2633 transitions. Word has length 20 [2022-11-16 12:12:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:03,064 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 2633 transitions. [2022-11-16 12:12:03,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2633 transitions. [2022-11-16 12:12:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:12:03,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:03,066 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] [2022-11-16 12:12:03,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (226)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:03,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:03,266 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1730724855, now seen corresponding path program 1 times [2022-11-16 12:12:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:03,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270392326] [2022-11-16 12:12:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:03,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:03,268 INFO L229 MonitoredProcess]: Starting monitored process 227 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:03,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Waiting until timeout for monitored process [2022-11-16 12:12:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:12:03,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:03,962 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:03,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:12:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:06,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:06,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270392326] [2022-11-16 12:12:06,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270392326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:12:06,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:12:06,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 12:12:06,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631734921] [2022-11-16 12:12:06,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:12:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:12:06,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:12:06,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:12:06,258 INFO L87 Difference]: Start difference. First operand 1034 states and 2633 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:10,063 INFO L93 Difference]: Finished difference Result 1673 states and 4192 transitions. [2022-11-16 12:12:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:12:10,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2022-11-16 12:12:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:10,066 INFO L225 Difference]: With dead ends: 1673 [2022-11-16 12:12:10,066 INFO L226 Difference]: Without dead ends: 1673 [2022-11-16 12:12:10,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:12:10,067 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:10,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 10 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 436 Unchecked, 1.1s Time] [2022-11-16 12:12:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-11-16 12:12:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1013. [2022-11-16 12:12:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1009 states have (on average 2.5550049554013876) internal successors, (2578), 1012 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2578 transitions. [2022-11-16 12:12:10,086 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2578 transitions. Word has length 20 [2022-11-16 12:12:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:10,086 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 2578 transitions. [2022-11-16 12:12:10,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2578 transitions. [2022-11-16 12:12:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:12:10,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:10,087 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:10,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:10,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:10,288 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash 569546991, now seen corresponding path program 5 times [2022-11-16 12:12:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:10,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342469828] [2022-11-16 12:12:10,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:12:10,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:10,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:10,290 INFO L229 MonitoredProcess]: Starting monitored process 228 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:10,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (228)] Waiting until timeout for monitored process [2022-11-16 12:12:10,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:12:10,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:12:10,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:11,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:11,048 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 [2022-11-16 12:12:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:15,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:15,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342469828] [2022-11-16 12:12:15,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342469828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:12:15,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:12:15,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 12:12:15,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539471233] [2022-11-16 12:12:15,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:12:15,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:12:15,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:12:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:12:15,250 INFO L87 Difference]: Start difference. First operand 1013 states and 2578 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2022-11-16 12:12:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:25,101 INFO L93 Difference]: Finished difference Result 1246 states and 3142 transitions. [2022-11-16 12:12:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:12:25,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 21 [2022-11-16 12:12:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:25,103 INFO L225 Difference]: With dead ends: 1246 [2022-11-16 12:12:25,104 INFO L226 Difference]: Without dead ends: 1246 [2022-11-16 12:12:25,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:12:25,104 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:25,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 176 Unchecked, 0.9s Time] [2022-11-16 12:12:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-11-16 12:12:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1078. [2022-11-16 12:12:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1074 states have (on average 2.5512104283054002) internal successors, (2740), 1077 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2740 transitions. [2022-11-16 12:12:25,118 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2740 transitions. Word has length 21 [2022-11-16 12:12:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:25,118 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 2740 transitions. [2022-11-16 12:12:25,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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) [2022-11-16 12:12:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2740 transitions. [2022-11-16 12:12:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:12:25,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:25,119 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:25,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (228)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:25,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:25,320 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1304731695, now seen corresponding path program 6 times [2022-11-16 12:12:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:25,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567229415] [2022-11-16 12:12:25,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:12:25,320 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 [2022-11-16 12:12:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:25,321 INFO L229 MonitoredProcess]: Starting monitored process 229 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:25,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (229)] Waiting until timeout for monitored process [2022-11-16 12:12:25,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 12:12:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:25,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:12:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:26,024 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:26,024 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 [2022-11-16 12:12:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:12:26,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:12:26,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:26,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567229415] [2022-11-16 12:12:26,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567229415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:26,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:26,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:12:26,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000719129] [2022-11-16 12:12:26,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:26,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:12:26,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:26,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:12:26,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:12:26,477 INFO L87 Difference]: Start difference. First operand 1078 states and 2740 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:26,908 INFO L93 Difference]: Finished difference Result 1206 states and 3004 transitions. [2022-11-16 12:12:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:12:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 12:12:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:26,911 INFO L225 Difference]: With dead ends: 1206 [2022-11-16 12:12:26,911 INFO L226 Difference]: Without dead ends: 1206 [2022-11-16 12:12:26,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:26,912 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 56 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:26,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 4 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-11-16 12:12:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2022-11-16 12:12:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 804. [2022-11-16 12:12:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 800 states have (on average 2.49) internal successors, (1992), 803 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1992 transitions. [2022-11-16 12:12:26,925 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1992 transitions. Word has length 21 [2022-11-16 12:12:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:26,925 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1992 transitions. [2022-11-16 12:12:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1992 transitions. [2022-11-16 12:12:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:12:26,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:26,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:26,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (229)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:27,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:27,127 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 80080940, now seen corresponding path program 1 times [2022-11-16 12:12:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:27,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400404086] [2022-11-16 12:12:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:27,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:27,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:27,128 INFO L229 MonitoredProcess]: Starting monitored process 230 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:27,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Waiting until timeout for monitored process [2022-11-16 12:12:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:27,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:12:27,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:27,880 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:27,881 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 [2022-11-16 12:12:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:28,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:31,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:31,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400404086] [2022-11-16 12:12:31,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400404086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:12:31,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:12:31,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:12:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737225439] [2022-11-16 12:12:31,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:12:31,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:12:31,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:31,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:12:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:12:31,024 INFO L87 Difference]: Start difference. First operand 804 states and 1992 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-11-16 12:12:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:37,805 INFO L93 Difference]: Finished difference Result 990 states and 2421 transitions. [2022-11-16 12:12:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:12:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 21 [2022-11-16 12:12:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:37,807 INFO L225 Difference]: With dead ends: 990 [2022-11-16 12:12:37,808 INFO L226 Difference]: Without dead ends: 990 [2022-11-16 12:12:37,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:12:37,808 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:37,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 192 Unchecked, 0.8s Time] [2022-11-16 12:12:37,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-16 12:12:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 802. [2022-11-16 12:12:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 798 states have (on average 2.489974937343358) internal successors, (1987), 801 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1987 transitions. [2022-11-16 12:12:37,821 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1987 transitions. Word has length 21 [2022-11-16 12:12:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:37,821 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1987 transitions. [2022-11-16 12:12:37,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-11-16 12:12:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1987 transitions. [2022-11-16 12:12:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:12:37,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:37,822 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:37,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:38,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:38,023 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash -36469676, now seen corresponding path program 2 times [2022-11-16 12:12:38,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:38,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101402325] [2022-11-16 12:12:38,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:12:38,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:38,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:38,025 INFO L229 MonitoredProcess]: Starting monitored process 231 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:38,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Waiting until timeout for monitored process [2022-11-16 12:12:38,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:12:38,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:12:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:38,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:38,729 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 [2022-11-16 12:12:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:12:39,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:12:39,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101402325] [2022-11-16 12:12:39,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101402325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:39,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:39,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:12:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316606115] [2022-11-16 12:12:39,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:12:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:39,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:12:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:12:39,193 INFO L87 Difference]: Start difference. First operand 802 states and 1987 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2022-11-16 12:12:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:39,650 INFO L93 Difference]: Finished difference Result 880 states and 2131 transitions. [2022-11-16 12:12:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:12:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 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 21 [2022-11-16 12:12:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:39,652 INFO L225 Difference]: With dead ends: 880 [2022-11-16 12:12:39,652 INFO L226 Difference]: Without dead ends: 880 [2022-11-16 12:12:39,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:39,652 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:39,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 4 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2022-11-16 12:12:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-16 12:12:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 718. [2022-11-16 12:12:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 714 states have (on average 2.453781512605042) internal successors, (1752), 717 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1752 transitions. [2022-11-16 12:12:39,663 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1752 transitions. Word has length 21 [2022-11-16 12:12:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:39,663 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 1752 transitions. [2022-11-16 12:12:39,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2022-11-16 12:12:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1752 transitions. [2022-11-16 12:12:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:12:39,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:39,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:39,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:39,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:39,865 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:39,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1968442412, now seen corresponding path program 3 times [2022-11-16 12:12:39,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:39,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219389049] [2022-11-16 12:12:39,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:12:39,865 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 [2022-11-16 12:12:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:39,866 INFO L229 MonitoredProcess]: Starting monitored process 232 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:39,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Waiting until timeout for monitored process [2022-11-16 12:12:40,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:12:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:40,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:12:40,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:40,579 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:40,580 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 [2022-11-16 12:12:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:12:41,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:12:41,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219389049] [2022-11-16 12:12:41,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219389049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:41,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:41,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:12:41,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027992025] [2022-11-16 12:12:41,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:41,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:12:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:12:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:12:41,044 INFO L87 Difference]: Start difference. First operand 718 states and 1752 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2022-11-16 12:12:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:41,518 INFO L93 Difference]: Finished difference Result 824 states and 1976 transitions. [2022-11-16 12:12:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:12:41,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 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 21 [2022-11-16 12:12:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:41,520 INFO L225 Difference]: With dead ends: 824 [2022-11-16 12:12:41,520 INFO L226 Difference]: Without dead ends: 824 [2022-11-16 12:12:41,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:41,521 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:41,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 4 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2022-11-16 12:12:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-11-16 12:12:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 730. [2022-11-16 12:12:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 726 states have (on average 2.4600550964187327) internal successors, (1786), 729 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1786 transitions. [2022-11-16 12:12:41,530 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1786 transitions. Word has length 21 [2022-11-16 12:12:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:41,531 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1786 transitions. [2022-11-16 12:12:41,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2022-11-16 12:12:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1786 transitions. [2022-11-16 12:12:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:12:41,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:41,532 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:41,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:41,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:41,732 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:41,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1130560600, now seen corresponding path program 1 times [2022-11-16 12:12:41,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:41,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944977616] [2022-11-16 12:12:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:12:41,733 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 [2022-11-16 12:12:41,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:41,734 INFO L229 MonitoredProcess]: Starting monitored process 233 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:41,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Waiting until timeout for monitored process [2022-11-16 12:12:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:12:42,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:12:42,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:42,500 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:42,500 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 [2022-11-16 12:12:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:43,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:46,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:46,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944977616] [2022-11-16 12:12:46,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944977616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:12:46,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:12:46,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:12:46,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887927568] [2022-11-16 12:12:46,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:12:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:12:46,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:12:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:12:46,441 INFO L87 Difference]: Start difference. First operand 730 states and 1786 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:51,287 INFO L93 Difference]: Finished difference Result 925 states and 2232 transitions. [2022-11-16 12:12:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:12:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2022-11-16 12:12:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:51,289 INFO L225 Difference]: With dead ends: 925 [2022-11-16 12:12:51,289 INFO L226 Difference]: Without dead ends: 925 [2022-11-16 12:12:51,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:12:51,290 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:51,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 21 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 175 Unchecked, 0.7s Time] [2022-11-16 12:12:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-11-16 12:12:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 734. [2022-11-16 12:12:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 730 states have (on average 2.463013698630137) internal successors, (1798), 733 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1798 transitions. [2022-11-16 12:12:51,299 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1798 transitions. Word has length 22 [2022-11-16 12:12:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:51,299 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1798 transitions. [2022-11-16 12:12:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1798 transitions. [2022-11-16 12:12:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:12:51,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:51,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:51,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:51,500 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash 123146216, now seen corresponding path program 2 times [2022-11-16 12:12:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:51,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568485614] [2022-11-16 12:12:51,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:12:51,501 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 [2022-11-16 12:12:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:51,502 INFO L229 MonitoredProcess]: Starting monitored process 234 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:51,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Waiting until timeout for monitored process [2022-11-16 12:12:52,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:12:52,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:12:52,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:52,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:52,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:12:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:12:52,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:12:52,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568485614] [2022-11-16 12:12:52,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568485614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:52,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:52,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:12:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19795309] [2022-11-16 12:12:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:12:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:12:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:12:52,663 INFO L87 Difference]: Start difference. First operand 734 states and 1798 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) [2022-11-16 12:12:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:53,105 INFO L93 Difference]: Finished difference Result 817 states and 1980 transitions. [2022-11-16 12:12:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:12:53,106 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 22 [2022-11-16 12:12:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:53,107 INFO L225 Difference]: With dead ends: 817 [2022-11-16 12:12:53,107 INFO L226 Difference]: Without dead ends: 817 [2022-11-16 12:12:53,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:53,107 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:53,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 4 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 55 Unchecked, 0.4s Time] [2022-11-16 12:12:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-16 12:12:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 740. [2022-11-16 12:12:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 736 states have (on average 2.4592391304347827) internal successors, (1810), 739 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:53,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1810 transitions. [2022-11-16 12:12:53,117 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1810 transitions. Word has length 22 [2022-11-16 12:12:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:53,117 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1810 transitions. [2022-11-16 12:12:53,117 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) [2022-11-16 12:12:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1810 transitions. [2022-11-16 12:12:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:12:53,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:53,118 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:53,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Forceful destruction successful, exit code 0 [2022-11-16 12:12:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:53,318 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash -627879024, now seen corresponding path program 3 times [2022-11-16 12:12:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767297575] [2022-11-16 12:12:53,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:12:53,319 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 [2022-11-16 12:12:53,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:53,327 INFO L229 MonitoredProcess]: Starting monitored process 235 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:53,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Waiting until timeout for monitored process [2022-11-16 12:12:53,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:12:53,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:53,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:12:53,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:54,050 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:54,051 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 [2022-11-16 12:12:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:12:54,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:12:54,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:54,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767297575] [2022-11-16 12:12:54,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767297575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:12:54,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:12:54,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:12:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665695436] [2022-11-16 12:12:54,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:12:54,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:12:54,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:12:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:12:54,494 INFO L87 Difference]: Start difference. First operand 740 states and 1810 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) [2022-11-16 12:12:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:12:54,912 INFO L93 Difference]: Finished difference Result 802 states and 1926 transitions. [2022-11-16 12:12:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:12:54,913 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 22 [2022-11-16 12:12:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:12:54,914 INFO L225 Difference]: With dead ends: 802 [2022-11-16 12:12:54,914 INFO L226 Difference]: Without dead ends: 802 [2022-11-16 12:12:54,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:12:54,914 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 55 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:12:54,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 4 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-11-16 12:12:54,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-11-16 12:12:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 738. [2022-11-16 12:12:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 734 states have (on average 2.4604904632152587) internal successors, (1806), 737 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:12:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1806 transitions. [2022-11-16 12:12:54,923 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1806 transitions. Word has length 22 [2022-11-16 12:12:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:12:54,923 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1806 transitions. [2022-11-16 12:12:54,923 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) [2022-11-16 12:12:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1806 transitions. [2022-11-16 12:12:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:12:54,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:12:54,924 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:12:54,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Ended with exit code 0 [2022-11-16 12:12:55,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:12:55,125 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:12:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:12:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1462196312, now seen corresponding path program 4 times [2022-11-16 12:12:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:12:55,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128019225] [2022-11-16 12:12:55,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:12:55,126 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 [2022-11-16 12:12:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:12:55,127 INFO L229 MonitoredProcess]: Starting monitored process 236 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:12:55,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Waiting until timeout for monitored process [2022-11-16 12:12:55,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:12:55,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:12:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:12:55,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:12:55,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:12:55,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:12:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:56,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:12:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:12:59,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:12:59,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128019225] [2022-11-16 12:12:59,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128019225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:12:59,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:12:59,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:12:59,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346579602] [2022-11-16 12:12:59,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:12:59,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:12:59,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:12:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:12:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:12:59,033 INFO L87 Difference]: Start difference. First operand 738 states and 1806 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:04,921 INFO L93 Difference]: Finished difference Result 851 states and 2108 transitions. [2022-11-16 12:13:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:13:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2022-11-16 12:13:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:04,923 INFO L225 Difference]: With dead ends: 851 [2022-11-16 12:13:04,923 INFO L226 Difference]: Without dead ends: 851 [2022-11-16 12:13:04,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:13:04,924 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:04,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-11-16 12:13:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-16 12:13:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 747. [2022-11-16 12:13:04,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 743 states have (on average 2.465679676985195) internal successors, (1832), 746 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1832 transitions. [2022-11-16 12:13:04,938 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1832 transitions. Word has length 22 [2022-11-16 12:13:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:04,938 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1832 transitions. [2022-11-16 12:13:04,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1832 transitions. [2022-11-16 12:13:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:04,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:04,940 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:04,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Forceful destruction successful, exit code 0 [2022-11-16 12:13:05,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:05,147 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -477431214, now seen corresponding path program 1 times [2022-11-16 12:13:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:05,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732870526] [2022-11-16 12:13:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:05,147 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 [2022-11-16 12:13:05,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:05,150 INFO L229 MonitoredProcess]: Starting monitored process 237 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:05,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Waiting until timeout for monitored process [2022-11-16 12:13:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:13:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:05,911 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:05,911 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 [2022-11-16 12:13:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:06,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:09,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732870526] [2022-11-16 12:13:09,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732870526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:09,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:09,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:13:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712415570] [2022-11-16 12:13:09,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:13:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:09,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:13:09,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:13:09,427 INFO L87 Difference]: Start difference. First operand 747 states and 1832 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:13,709 INFO L93 Difference]: Finished difference Result 941 states and 2298 transitions. [2022-11-16 12:13:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:13:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:13:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:13,712 INFO L225 Difference]: With dead ends: 941 [2022-11-16 12:13:13,712 INFO L226 Difference]: Without dead ends: 941 [2022-11-16 12:13:13,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:13:13,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:13,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-11-16 12:13:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-11-16 12:13:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 758. [2022-11-16 12:13:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 754 states have (on average 2.4655172413793105) internal successors, (1859), 757 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1859 transitions. [2022-11-16 12:13:13,723 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1859 transitions. Word has length 23 [2022-11-16 12:13:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:13,723 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 1859 transitions. [2022-11-16 12:13:13,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1859 transitions. [2022-11-16 12:13:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:13,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:13,724 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:13,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Ended with exit code 0 [2022-11-16 12:13:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:13,925 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2134086588, now seen corresponding path program 2 times [2022-11-16 12:13:13,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:13,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440369635] [2022-11-16 12:13:13,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:13:13,925 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 [2022-11-16 12:13:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:13,926 INFO L229 MonitoredProcess]: Starting monitored process 238 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:13,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Waiting until timeout for monitored process [2022-11-16 12:13:14,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:13:14,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:13:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:14,657 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:14,657 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 [2022-11-16 12:13:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:13:15,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:13:15,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:15,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440369635] [2022-11-16 12:13:15,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440369635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:13:15,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:13:15,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:13:15,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031299048] [2022-11-16 12:13:15,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:13:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:13:15,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:13:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:13:15,108 INFO L87 Difference]: Start difference. First operand 758 states and 1859 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:15,543 INFO L93 Difference]: Finished difference Result 817 states and 1975 transitions. [2022-11-16 12:13:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:13:15,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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 23 [2022-11-16 12:13:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:15,545 INFO L225 Difference]: With dead ends: 817 [2022-11-16 12:13:15,545 INFO L226 Difference]: Without dead ends: 817 [2022-11-16 12:13:15,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:13:15,546 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:15,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 4 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-11-16 12:13:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-16 12:13:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 762. [2022-11-16 12:13:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 758 states have (on average 2.465699208443272) internal successors, (1869), 761 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1869 transitions. [2022-11-16 12:13:15,554 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1869 transitions. Word has length 23 [2022-11-16 12:13:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:15,555 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 1869 transitions. [2022-11-16 12:13:15,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1869 transitions. [2022-11-16 12:13:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:15,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:15,556 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:15,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Ended with exit code 0 [2022-11-16 12:13:15,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:15,756 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2134087580, now seen corresponding path program 1 times [2022-11-16 12:13:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:15,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595691700] [2022-11-16 12:13:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:15,757 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 [2022-11-16 12:13:15,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:15,758 INFO L229 MonitoredProcess]: Starting monitored process 239 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:15,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Waiting until timeout for monitored process [2022-11-16 12:13:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:13:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:16,530 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:16,530 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 [2022-11-16 12:13:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:17,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:19,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:19,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595691700] [2022-11-16 12:13:19,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595691700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:19,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:19,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:13:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65866921] [2022-11-16 12:13:19,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:13:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:13:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:13:19,687 INFO L87 Difference]: Start difference. First operand 762 states and 1869 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:23,048 INFO L93 Difference]: Finished difference Result 1048 states and 2554 transitions. [2022-11-16 12:13:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:13:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:13:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:23,050 INFO L225 Difference]: With dead ends: 1048 [2022-11-16 12:13:23,050 INFO L226 Difference]: Without dead ends: 1048 [2022-11-16 12:13:23,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:13:23,051 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:23,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2022-11-16 12:13:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-11-16 12:13:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 767. [2022-11-16 12:13:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 763 states have (on average 2.4744429882044563) internal successors, (1888), 766 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1888 transitions. [2022-11-16 12:13:23,060 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1888 transitions. Word has length 23 [2022-11-16 12:13:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:23,060 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1888 transitions. [2022-11-16 12:13:23,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1888 transitions. [2022-11-16 12:13:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:23,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:23,061 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:23,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Ended with exit code 0 [2022-11-16 12:13:23,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:23,261 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2010590122, now seen corresponding path program 3 times [2022-11-16 12:13:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:23,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102290178] [2022-11-16 12:13:23,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:13:23,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:23,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:23,263 INFO L229 MonitoredProcess]: Starting monitored process 240 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:23,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Waiting until timeout for monitored process [2022-11-16 12:13:23,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:13:23,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:23,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:13:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:24,017 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:24,018 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 [2022-11-16 12:13:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:13:24,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:13:24,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102290178] [2022-11-16 12:13:24,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102290178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:13:24,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:13:24,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:13:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951022514] [2022-11-16 12:13:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:13:24,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:13:24,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:24,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:13:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:13:24,506 INFO L87 Difference]: Start difference. First operand 767 states and 1888 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:24,888 INFO L93 Difference]: Finished difference Result 859 states and 2087 transitions. [2022-11-16 12:13:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:13:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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 23 [2022-11-16 12:13:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:24,890 INFO L225 Difference]: With dead ends: 859 [2022-11-16 12:13:24,890 INFO L226 Difference]: Without dead ends: 859 [2022-11-16 12:13:24,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:13:24,890 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:24,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 4 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-11-16 12:13:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-11-16 12:13:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 775. [2022-11-16 12:13:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 771 states have (on average 2.4734111543450066) internal successors, (1907), 774 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1907 transitions. [2022-11-16 12:13:24,899 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1907 transitions. Word has length 23 [2022-11-16 12:13:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:24,899 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 1907 transitions. [2022-11-16 12:13:24,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1907 transitions. [2022-11-16 12:13:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:24,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:24,900 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:24,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Ended with exit code 0 [2022-11-16 12:13:25,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:25,100 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2010591114, now seen corresponding path program 2 times [2022-11-16 12:13:25,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:25,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133084126] [2022-11-16 12:13:25,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:13:25,101 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 [2022-11-16 12:13:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:25,102 INFO L229 MonitoredProcess]: Starting monitored process 241 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:25,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Waiting until timeout for monitored process [2022-11-16 12:13:25,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:13:25,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:13:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:25,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:25,896 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 [2022-11-16 12:13:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:13:26,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:13:26,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:26,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133084126] [2022-11-16 12:13:26,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133084126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:13:26,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:13:26,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:13:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130225070] [2022-11-16 12:13:26,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:13:26,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:13:26,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:26,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:13:26,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:13:26,388 INFO L87 Difference]: Start difference. First operand 775 states and 1907 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:26,847 INFO L93 Difference]: Finished difference Result 837 states and 2021 transitions. [2022-11-16 12:13:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:13:26,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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 23 [2022-11-16 12:13:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:26,849 INFO L225 Difference]: With dead ends: 837 [2022-11-16 12:13:26,850 INFO L226 Difference]: Without dead ends: 837 [2022-11-16 12:13:26,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:13:26,850 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 54 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:26,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 4 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2022-11-16 12:13:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-16 12:13:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 783. [2022-11-16 12:13:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 779 states have (on average 2.473684210526316) internal successors, (1927), 782 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1927 transitions. [2022-11-16 12:13:26,859 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1927 transitions. Word has length 23 [2022-11-16 12:13:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:26,860 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1927 transitions. [2022-11-16 12:13:26,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1927 transitions. [2022-11-16 12:13:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:26,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:26,861 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:26,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Ended with exit code 0 [2022-11-16 12:13:27,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:27,061 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:27,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1312480426, now seen corresponding path program 4 times [2022-11-16 12:13:27,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:27,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115201945] [2022-11-16 12:13:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:13:27,062 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 [2022-11-16 12:13:27,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:27,063 INFO L229 MonitoredProcess]: Starting monitored process 242 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:27,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Waiting until timeout for monitored process [2022-11-16 12:13:27,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:13:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:27,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:13:27,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:27,861 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:27,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 12:13:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:28,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:30,945 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:30,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115201945] [2022-11-16 12:13:30,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115201945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:30,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:30,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:13:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224966287] [2022-11-16 12:13:30,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:30,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:13:30,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:30,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:13:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:13:30,946 INFO L87 Difference]: Start difference. First operand 783 states and 1927 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:34,877 INFO L93 Difference]: Finished difference Result 1005 states and 2444 transitions. [2022-11-16 12:13:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:13:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:13:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:34,880 INFO L225 Difference]: With dead ends: 1005 [2022-11-16 12:13:34,880 INFO L226 Difference]: Without dead ends: 1005 [2022-11-16 12:13:34,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:13:34,880 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:34,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 107 Unchecked, 0.4s Time] [2022-11-16 12:13:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-11-16 12:13:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 783. [2022-11-16 12:13:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 779 states have (on average 2.473684210526316) internal successors, (1927), 782 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1927 transitions. [2022-11-16 12:13:34,891 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1927 transitions. Word has length 23 [2022-11-16 12:13:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:34,892 INFO L495 AbstractCegarLoop]: Abstraction has 783 states and 1927 transitions. [2022-11-16 12:13:34,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1927 transitions. [2022-11-16 12:13:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:34,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:34,893 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:34,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Ended with exit code 0 [2022-11-16 12:13:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:35,093 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1575109526, now seen corresponding path program 5 times [2022-11-16 12:13:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:35,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879721493] [2022-11-16 12:13:35,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:13:35,094 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 [2022-11-16 12:13:35,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:35,096 INFO L229 MonitoredProcess]: Starting monitored process 243 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:35,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Waiting until timeout for monitored process [2022-11-16 12:13:35,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:13:35,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:13:35,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:35,903 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:35,903 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 [2022-11-16 12:13:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:36,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:38,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879721493] [2022-11-16 12:13:38,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879721493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:38,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:38,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:13:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861029204] [2022-11-16 12:13:38,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:13:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:38,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:13:38,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:13:38,974 INFO L87 Difference]: Start difference. First operand 783 states and 1927 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:44,812 INFO L93 Difference]: Finished difference Result 920 states and 2296 transitions. [2022-11-16 12:13:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:13:44,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:13:44,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:44,815 INFO L225 Difference]: With dead ends: 920 [2022-11-16 12:13:44,815 INFO L226 Difference]: Without dead ends: 920 [2022-11-16 12:13:44,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:13:44,815 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:44,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-11-16 12:13:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-11-16 12:13:44,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 796. [2022-11-16 12:13:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 792 states have (on average 2.492424242424242) internal successors, (1974), 795 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1974 transitions. [2022-11-16 12:13:44,827 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1974 transitions. Word has length 23 [2022-11-16 12:13:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:44,827 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1974 transitions. [2022-11-16 12:13:44,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1974 transitions. [2022-11-16 12:13:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:44,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:44,828 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:44,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Ended with exit code 0 [2022-11-16 12:13:45,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:45,031 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash -658976694, now seen corresponding path program 3 times [2022-11-16 12:13:45,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:45,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842409269] [2022-11-16 12:13:45,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:13:45,032 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 [2022-11-16 12:13:45,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:45,033 INFO L229 MonitoredProcess]: Starting monitored process 244 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:45,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Waiting until timeout for monitored process [2022-11-16 12:13:45,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:13:45,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:45,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:13:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:45,852 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:45,853 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 [2022-11-16 12:13:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:13:46,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:13:46,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:46,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842409269] [2022-11-16 12:13:46,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842409269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:13:46,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:13:46,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:13:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854524649] [2022-11-16 12:13:46,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:13:46,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:13:46,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:13:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:13:46,382 INFO L87 Difference]: Start difference. First operand 796 states and 1974 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:46,863 INFO L93 Difference]: Finished difference Result 899 states and 2198 transitions. [2022-11-16 12:13:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:13:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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 23 [2022-11-16 12:13:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:46,866 INFO L225 Difference]: With dead ends: 899 [2022-11-16 12:13:46,866 INFO L226 Difference]: Without dead ends: 899 [2022-11-16 12:13:46,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:13:46,866 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:46,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 4 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-11-16 12:13:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-16 12:13:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 788. [2022-11-16 12:13:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 784 states have (on average 2.4885204081632653) internal successors, (1951), 787 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1951 transitions. [2022-11-16 12:13:46,878 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1951 transitions. Word has length 23 [2022-11-16 12:13:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:46,878 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1951 transitions. [2022-11-16 12:13:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1951 transitions. [2022-11-16 12:13:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:46,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:46,879 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:46,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Ended with exit code 0 [2022-11-16 12:13:47,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:47,080 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash 773353234, now seen corresponding path program 6 times [2022-11-16 12:13:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:47,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464626461] [2022-11-16 12:13:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:13:47,081 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 [2022-11-16 12:13:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:47,082 INFO L229 MonitoredProcess]: Starting monitored process 245 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:47,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Waiting until timeout for monitored process [2022-11-16 12:13:47,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 12:13:47,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:13:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:47,848 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:47,849 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 [2022-11-16 12:13:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:13:48,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:13:48,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464626461] [2022-11-16 12:13:48,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464626461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:13:48,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:13:48,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:13:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349999603] [2022-11-16 12:13:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:13:48,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:13:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:13:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:13:48,383 INFO L87 Difference]: Start difference. First operand 788 states and 1951 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:48,845 INFO L93 Difference]: Finished difference Result 897 states and 2194 transitions. [2022-11-16 12:13:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:13:48,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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 23 [2022-11-16 12:13:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:48,847 INFO L225 Difference]: With dead ends: 897 [2022-11-16 12:13:48,847 INFO L226 Difference]: Without dead ends: 897 [2022-11-16 12:13:48,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:13:48,848 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:48,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-16 12:13:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-16 12:13:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 768. [2022-11-16 12:13:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 764 states have (on average 2.4698952879581153) internal successors, (1887), 767 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1887 transitions. [2022-11-16 12:13:48,857 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1887 transitions. Word has length 23 [2022-11-16 12:13:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:48,857 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1887 transitions. [2022-11-16 12:13:48,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2022-11-16 12:13:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1887 transitions. [2022-11-16 12:13:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:13:48,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:48,858 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:48,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Ended with exit code 0 [2022-11-16 12:13:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:49,058 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1689486066, now seen corresponding path program 4 times [2022-11-16 12:13:49,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:49,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088811797] [2022-11-16 12:13:49,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:13:49,059 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 [2022-11-16 12:13:49,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:49,060 INFO L229 MonitoredProcess]: Starting monitored process 246 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:49,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Waiting until timeout for monitored process [2022-11-16 12:13:49,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:13:49,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:13:49,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:49,901 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:49,902 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 [2022-11-16 12:13:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:50,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:53,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:13:53,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088811797] [2022-11-16 12:13:53,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088811797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:53,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:13:53,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:13:53,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867959947] [2022-11-16 12:13:53,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:13:53,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:13:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:13:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:13:53,084 INFO L87 Difference]: Start difference. First operand 768 states and 1887 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:58,722 INFO L93 Difference]: Finished difference Result 951 states and 2322 transitions. [2022-11-16 12:13:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:13:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:13:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:58,723 INFO L225 Difference]: With dead ends: 951 [2022-11-16 12:13:58,724 INFO L226 Difference]: Without dead ends: 951 [2022-11-16 12:13:58,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:13:58,724 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:58,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 114 Unchecked, 0.7s Time] [2022-11-16 12:13:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-11-16 12:13:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 768. [2022-11-16 12:13:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 764 states have (on average 2.4698952879581153) internal successors, (1887), 767 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1887 transitions. [2022-11-16 12:13:58,732 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1887 transitions. Word has length 23 [2022-11-16 12:13:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:58,732 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1887 transitions. [2022-11-16 12:13:58,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1887 transitions. [2022-11-16 12:13:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:13:58,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:58,733 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-16 12:13:58,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Ended with exit code 0 [2022-11-16 12:13:58,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:13:58,934 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:13:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash 682512999, now seen corresponding path program 4 times [2022-11-16 12:13:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:13:58,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139172743] [2022-11-16 12:13:58,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:13:58,935 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 [2022-11-16 12:13:58,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:13:58,936 INFO L229 MonitoredProcess]: Starting monitored process 247 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:13:58,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Waiting until timeout for monitored process [2022-11-16 12:13:59,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:13:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:59,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 12:13:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:59,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:13:59,780 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 [2022-11-16 12:14:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:02,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:18,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:14:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139172743] [2022-11-16 12:14:18,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139172743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:18,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:14:18,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-16 12:14:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92608770] [2022-11-16 12:14:18,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:18,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:14:18,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:14:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:14:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 12:14:18,544 INFO L87 Difference]: Start difference. First operand 768 states and 1887 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) [2022-11-16 12:15:04,267 WARN L233 SmtUtils]: Spent 22.35s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:15:28,847 WARN L233 SmtUtils]: Spent 21.31s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:15:51,492 WARN L233 SmtUtils]: Spent 19.31s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:16:08,706 WARN L233 SmtUtils]: Spent 13.99s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:16:27,984 WARN L233 SmtUtils]: Spent 15.80s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:16:50,573 WARN L233 SmtUtils]: Spent 18.80s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:17:05,927 WARN L233 SmtUtils]: Spent 11.62s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:17:18,225 WARN L233 SmtUtils]: Spent 8.50s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:17:29,969 WARN L233 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:17:40,896 WARN L233 SmtUtils]: Spent 7.16s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:17:50,284 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:18:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:57,439 INFO L93 Difference]: Finished difference Result 27458 states and 66957 transitions. [2022-11-16 12:18:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:18:57,441 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 24 [2022-11-16 12:18:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:57,490 INFO L225 Difference]: With dead ends: 27458 [2022-11-16 12:18:57,490 INFO L226 Difference]: Without dead ends: 27458 [2022-11-16 12:18:57,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 216.1s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 12:18:57,491 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 18647 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 16279 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18647 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 16325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 16279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:57,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18647 Valid, 1056 Invalid, 16325 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [46 Valid, 16279 Invalid, 0 Unknown, 0 Unchecked, 78.6s Time] [2022-11-16 12:18:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27458 states. [2022-11-16 12:18:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27458 to 792. [2022-11-16 12:18:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 788 states have (on average 2.4555837563451774) internal successors, (1935), 791 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1935 transitions. [2022-11-16 12:18:57,639 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1935 transitions. Word has length 24 [2022-11-16 12:18:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:57,639 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1935 transitions. [2022-11-16 12:18:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-16 12:18:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1935 transitions. [2022-11-16 12:18:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:18:57,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:57,640 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:57,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Ended with exit code 0 [2022-11-16 12:18:57,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:18:57,841 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-16 12:18:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1971756349, now seen corresponding path program 4 times [2022-11-16 12:18:57,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:18:57,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124139042] [2022-11-16 12:18:57,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:18:57,842 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 [2022-11-16 12:18:57,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:18:57,843 INFO L229 MonitoredProcess]: Starting monitored process 248 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 12:18:57,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8169a86b-faaa-43ba-8c17-77555b85fc40/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (248)] Waiting until timeout for monitored process [2022-11-16 12:18:58,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:18:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:18:58,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:58,742 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 12:18:58,743 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 [2022-11-16 12:18:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:59,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:04,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:19:04,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124139042] [2022-11-16 12:19:04,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124139042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:04,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:19:04,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:19:04,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689075859] [2022-11-16 12:19:04,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:04,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:19:04,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:19:04,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:19:04,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:19:04,812 INFO L87 Difference]: Start difference. First operand 792 states and 1935 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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)