./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/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_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/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_92af3936-638f-4bb8-b327-997a980794e7/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 11:26:47,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:26:47,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:26:47,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:26:47,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:26:47,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:26:47,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:26:47,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:26:47,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:26:47,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:26:47,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:26:47,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:26:47,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:26:47,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:26:47,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:26:47,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:26:47,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:26:47,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:26:47,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:26:47,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:26:47,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:26:47,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:26:47,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:26:47,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:26:47,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:26:47,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:26:47,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:26:47,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:26:47,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:26:47,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:26:47,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:26:47,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:26:47,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:26:47,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:26:47,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:26:47,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:26:47,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:26:47,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:26:47,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:26:47,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:26:47,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:26:47,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:26:47,277 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:26:47,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:26:47,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:26:47,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:26:47,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:26:47,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:26:47,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:26:47,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:26:47,282 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:26:47,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:26:47,283 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:26:47,284 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:26:47,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:26:47,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:26:47,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:26:47,285 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:26:47,285 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:26:47,285 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:26:47,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:26:47,286 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:26:47,286 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:26:47,286 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:26:47,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:26:47,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:26:47,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:26:47,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:26:47,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:26:47,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:26:47,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:26:47,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:26:47,289 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_92af3936-638f-4bb8-b327-997a980794e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-16 11:26:47,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:26:47,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:26:47,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:26:47,670 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:26:47,671 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:26:47,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-16 11:26:47,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/e903961a0/09eaa8b1a8de4cd683e6a8056b3cfdfa/FLAG3118b2667 [2022-11-16 11:26:48,311 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:26:48,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-16 11:26:48,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/e903961a0/09eaa8b1a8de4cd683e6a8056b3cfdfa/FLAG3118b2667 [2022-11-16 11:26:48,674 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/e903961a0/09eaa8b1a8de4cd683e6a8056b3cfdfa [2022-11-16 11:26:48,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:26:48,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:26:48,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:26:48,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:26:48,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:26:48,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:26:48" (1/1) ... [2022-11-16 11:26:48,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ed32f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:48, skipping insertion in model container [2022-11-16 11:26:48,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:26:48" (1/1) ... [2022-11-16 11:26:48,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:26:48,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:26:48,951 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_92af3936-638f-4bb8-b327-997a980794e7/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-16 11:26:48,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:26:48,972 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 11:26:48,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2fbfcb4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:48, skipping insertion in model container [2022-11-16 11:26:48,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:26:48,974 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:26:48,976 INFO L158 Benchmark]: Toolchain (without parser) took 294.75ms. Allocated memory is still 127.9MB. Free memory was 95.6MB in the beginning and 103.5MB in the end (delta: -7.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-16 11:26:48,977 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:26:48,978 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.19ms. Allocated memory is still 127.9MB. Free memory was 95.3MB in the beginning and 103.5MB in the end (delta: -8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-16 11:26:48,980 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 83.9MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.19ms. Allocated memory is still 127.9MB. Free memory was 95.3MB in the beginning and 103.5MB in the end (delta: -8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/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_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/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_92af3936-638f-4bb8-b327-997a980794e7/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 11:26:51,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:26:51,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:26:51,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:26:51,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:26:51,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:26:51,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:26:51,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:26:51,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:26:51,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:26:51,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:26:51,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:26:51,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:26:51,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:26:51,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:26:51,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:26:51,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:26:51,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:26:51,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:26:51,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:26:51,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:26:51,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:26:51,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:26:51,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:26:51,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:26:51,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:26:51,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:26:51,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:26:51,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:26:51,322 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:26:51,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:26:51,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:26:51,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:26:51,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:26:51,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:26:51,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:26:51,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:26:51,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:26:51,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:26:51,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:26:51,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:26:51,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:26:51,374 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:26:51,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:26:51,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:26:51,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:26:51,376 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:26:51,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:26:51,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:26:51,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:26:51,377 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:26:51,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:26:51,378 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:26:51,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:26:51,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:26:51,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:26:51,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:26:51,379 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:26:51,379 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:26:51,380 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:26:51,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:26:51,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:26:51,380 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:26:51,380 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:26:51,381 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:26:51,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:26:51,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:26:51,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:26:51,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:26:51,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:26:51,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:26:51,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:26:51,383 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:26:51,383 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:26:51,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:26:51,383 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_92af3936-638f-4bb8-b327-997a980794e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-16 11:26:51,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:26:51,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:26:51,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:26:51,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:26:51,788 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:26:51,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-16 11:26:51,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/44084f758/fe46be3db4da4fd8b991aa4158ce602e/FLAGa25f80177 [2022-11-16 11:26:52,427 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:26:52,428 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-16 11:26:52,439 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/44084f758/fe46be3db4da4fd8b991aa4158ce602e/FLAGa25f80177 [2022-11-16 11:26:52,740 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/data/44084f758/fe46be3db4da4fd8b991aa4158ce602e [2022-11-16 11:26:52,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:26:52,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:26:52,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:26:52,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:26:52,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:26:52,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:26:52" (1/1) ... [2022-11-16 11:26:52,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297d8c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:52, skipping insertion in model container [2022-11-16 11:26:52,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:26:52" (1/1) ... [2022-11-16 11:26:52,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:26:52,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:26:52,963 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_92af3936-638f-4bb8-b327-997a980794e7/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-16 11:26:53,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:26:53,024 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:26:53,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:26:53,067 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_92af3936-638f-4bb8-b327-997a980794e7/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-16 11:26:53,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:26:53,081 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:26:53,112 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_92af3936-638f-4bb8-b327-997a980794e7/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-16 11:26:53,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:26:53,136 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:26:53,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53 WrapperNode [2022-11-16 11:26:53,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:26:53,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:26:53,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:26:53,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:26:53,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,190 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 262 [2022-11-16 11:26:53,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:26:53,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:26:53,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:26:53,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:26:53,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,247 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:26:53,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:26:53,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:26:53,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:26:53,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (1/1) ... [2022-11-16 11:26:53,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:26:53,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:53,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:26:53,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:26:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:26:53,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:26:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:26:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:26:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:26:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:26:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:26:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:26:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:26:53,345 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:26:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:26:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:26:53,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:26:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:26:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 11:26:53,347 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 11:26:53,554 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:26:53,556 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:26:54,651 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:26:54,668 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:26:54,669 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:26:54,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:26:54 BoogieIcfgContainer [2022-11-16 11:26:54,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:26:54,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:26:54,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:26:54,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:26:54,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:26:52" (1/3) ... [2022-11-16 11:26:54,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a07a080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:26:54, skipping insertion in model container [2022-11-16 11:26:54,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:26:53" (2/3) ... [2022-11-16 11:26:54,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a07a080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:26:54, skipping insertion in model container [2022-11-16 11:26:54,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:26:54" (3/3) ... [2022-11-16 11:26:54,682 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-11-16 11:26:54,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:26:54,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-16 11:26:54,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:26:54,963 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:26:55,032 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:26:55,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-16 11:26:55,062 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-16 11:26:55,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 393 transitions, 810 flow [2022-11-16 11:26:55,339 INFO L130 PetriNetUnfolder]: 29/390 cut-off events. [2022-11-16 11:26:55,339 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:26:55,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 390 events. 29/390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 654 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-11-16 11:26:55,366 INFO L119 LiptonReduction]: Number of co-enabled transitions 20950 [2022-11-16 11:28:05,211 INFO L134 LiptonReduction]: Checked pairs total: 21781 [2022-11-16 11:28:05,211 INFO L136 LiptonReduction]: Total number of compositions: 466 [2022-11-16 11:28:05,219 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 63 transitions, 150 flow [2022-11-16 11:28:05,339 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:05,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:28:05,375 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;@532d1583, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:28:05,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-16 11:28:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:28:05,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:05,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:28:05,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:05,396 INFO L85 PathProgramCache]: Analyzing trace with hash 49928, now seen corresponding path program 1 times [2022-11-16 11:28:05,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:05,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217070423] [2022-11-16 11:28:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:05,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:05,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:05,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:05,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:28:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:05,827 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:28:05,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:28:05,874 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 11:28:05,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:05,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:05,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217070423] [2022-11-16 11:28:05,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217070423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:05,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:05,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845586765] [2022-11-16 11:28:05,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:05,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:05,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:05,925 INFO L87 Difference]: Start difference. First operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 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 11:28:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:06,384 INFO L93 Difference]: Finished difference Result 1248 states and 4342 transitions. [2022-11-16 11:28:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:06,388 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 11:28:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:06,427 INFO L225 Difference]: With dead ends: 1248 [2022-11-16 11:28:06,428 INFO L226 Difference]: Without dead ends: 1248 [2022-11-16 11:28:06,429 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 11:28:06,435 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:06,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:28:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-11-16 11:28:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-11-16 11:28:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 974 states have (on average 4.457905544147844) internal successors, (4342), 1247 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4342 transitions. [2022-11-16 11:28:06,619 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4342 transitions. Word has length 2 [2022-11-16 11:28:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:06,620 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 4342 transitions. [2022-11-16 11:28:06,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4342 transitions. [2022-11-16 11:28:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:28:06,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:06,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:28:06,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:06,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:06,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash 49929, now seen corresponding path program 1 times [2022-11-16 11:28:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:06,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76770136] [2022-11-16 11:28:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:06,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:06,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:06,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:06,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:28:06,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:07,128 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:07,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:28:07,191 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 11:28:07,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:07,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:07,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76770136] [2022-11-16 11:28:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76770136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:07,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:07,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776317582] [2022-11-16 11:28:07,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:07,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:07,195 INFO L87 Difference]: Start difference. First operand 1248 states and 4342 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 11:28:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:07,955 INFO L93 Difference]: Finished difference Result 2492 states and 8680 transitions. [2022-11-16 11:28:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:07,957 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 11:28:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:08,001 INFO L225 Difference]: With dead ends: 2492 [2022-11-16 11:28:08,001 INFO L226 Difference]: Without dead ends: 2492 [2022-11-16 11:28:08,002 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 11:28:08,007 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:08,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 6 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:28:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-16 11:28:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 1251. [2022-11-16 11:28:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 977 states have (on average 4.452405322415558) internal successors, (4350), 1250 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4350 transitions. [2022-11-16 11:28:08,070 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4350 transitions. Word has length 2 [2022-11-16 11:28:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:08,070 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 4350 transitions. [2022-11-16 11:28:08,071 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 11:28:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4350 transitions. [2022-11-16 11:28:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:28:08,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:08,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:28:08,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:08,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:08,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1554452, now seen corresponding path program 1 times [2022-11-16 11:28:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:08,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877963863] [2022-11-16 11:28:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:08,289 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 11:28:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:08,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:08,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:28:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:08,587 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:08,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:28:08,727 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 11:28:08,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:09,043 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 11:28:09,044 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:09,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877963863] [2022-11-16 11:28:09,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877963863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:09,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:09,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:28:09,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797500187] [2022-11-16 11:28:09,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:09,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:28:09,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:28:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:09,046 INFO L87 Difference]: Start difference. First operand 1251 states and 4350 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 11:28:11,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:13,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:14,338 INFO L93 Difference]: Finished difference Result 3742 states and 13034 transitions. [2022-11-16 11:28:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:28:14,340 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 11:28:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:14,373 INFO L225 Difference]: With dead ends: 3742 [2022-11-16 11:28:14,374 INFO L226 Difference]: Without dead ends: 3742 [2022-11-16 11:28:14,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:28:14,375 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 179 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:14,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 12 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-16 11:28:14,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2022-11-16 11:28:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 1260. [2022-11-16 11:28:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 986 states have (on average 4.436105476673428) internal successors, (4374), 1259 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 4374 transitions. [2022-11-16 11:28:14,514 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 4374 transitions. Word has length 3 [2022-11-16 11:28:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:14,515 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 4374 transitions. [2022-11-16 11:28:14,515 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 11:28:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 4374 transitions. [2022-11-16 11:28:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:28:14,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:14,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:28:14,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:14,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:14,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash 48295142, now seen corresponding path program 1 times [2022-11-16 11:28:14,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:14,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640592048] [2022-11-16 11:28:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:14,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:14,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:14,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:14,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:28:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:14,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:15,037 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 11:28:15,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-16 11:28:15,099 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:28:15,100 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 11:28:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:15,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:28:15,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:15,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:28:15,298 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 11:28:15,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:15,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640592048] [2022-11-16 11:28:15,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640592048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:15,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:15,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:15,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176262818] [2022-11-16 11:28:15,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:15,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:15,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:15,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:15,301 INFO L87 Difference]: Start difference. First operand 1260 states and 4374 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:15,683 INFO L93 Difference]: Finished difference Result 1034 states and 3469 transitions. [2022-11-16 11:28:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:28:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:15,692 INFO L225 Difference]: With dead ends: 1034 [2022-11-16 11:28:15,692 INFO L226 Difference]: Without dead ends: 1034 [2022-11-16 11:28:15,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:15,694 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:15,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-16 11:28:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-16 11:28:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2022-11-16 11:28:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 824 states have (on average 4.209951456310679) internal successors, (3469), 1033 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:15,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3469 transitions. [2022-11-16 11:28:15,775 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3469 transitions. Word has length 4 [2022-11-16 11:28:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:15,813 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 3469 transitions. [2022-11-16 11:28:15,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3469 transitions. [2022-11-16 11:28:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:28:15,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:15,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:28:15,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:16,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:16,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash 48295143, now seen corresponding path program 1 times [2022-11-16 11:28:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298275973] [2022-11-16 11:28:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:16,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:16,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:16,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:16,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:28:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:16,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:16,305 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:28:16,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 11:28:16,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:16,723 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:28:16,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 11:28:17,136 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-16 11:28:17,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-16 11:28:19,655 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 11:28:19,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:19,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:19,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298275973] [2022-11-16 11:28:19,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298275973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:19,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:19,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:19,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428222105] [2022-11-16 11:28:19,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:19,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:19,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-16 11:28:19,660 INFO L87 Difference]: Start difference. First operand 1034 states and 3469 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:19,935 INFO L93 Difference]: Finished difference Result 1036 states and 3473 transitions. [2022-11-16 11:28:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:28:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:28:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:19,948 INFO L225 Difference]: With dead ends: 1036 [2022-11-16 11:28:19,948 INFO L226 Difference]: Without dead ends: 1036 [2022-11-16 11:28:19,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-16 11:28:19,950 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:19,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-16 11:28:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-11-16 11:28:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1036. [2022-11-16 11:28:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 826 states have (on average 4.204600484261501) internal successors, (3473), 1035 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3473 transitions. [2022-11-16 11:28:19,992 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3473 transitions. Word has length 4 [2022-11-16 11:28:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:19,993 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 3473 transitions. [2022-11-16 11:28:19,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3473 transitions. [2022-11-16 11:28:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:19,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:19,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:28:20,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:20,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:20,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1494141746, now seen corresponding path program 1 times [2022-11-16 11:28:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:20,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243989625] [2022-11-16 11:28:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:20,208 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 11:28:20,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:20,209 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:20,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:28:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:20,454 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 11:28:20,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:20,563 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 11:28:20,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243989625] [2022-11-16 11:28:20,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243989625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:20,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:20,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:28:20,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291872235] [2022-11-16 11:28:20,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:20,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:28:20,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:28:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:28:20,566 INFO L87 Difference]: Start difference. First operand 1036 states and 3473 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 11:28:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:22,143 INFO L93 Difference]: Finished difference Result 4085 states and 13767 transitions. [2022-11-16 11:28:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:28:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 5 [2022-11-16 11:28:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:22,175 INFO L225 Difference]: With dead ends: 4085 [2022-11-16 11:28:22,176 INFO L226 Difference]: Without dead ends: 4085 [2022-11-16 11:28:22,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:28:22,177 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 252 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:22,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 18 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:28:22,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2022-11-16 11:28:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 1038. [2022-11-16 11:28:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 828 states have (on average 4.196859903381642) internal successors, (3475), 1037 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3475 transitions. [2022-11-16 11:28:22,256 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3475 transitions. Word has length 5 [2022-11-16 11:28:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:22,257 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3475 transitions. [2022-11-16 11:28:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 11:28:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3475 transitions. [2022-11-16 11:28:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:22,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:22,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:28:22,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:22,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:22,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:22,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1497148963, now seen corresponding path program 1 times [2022-11-16 11:28:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042810189] [2022-11-16 11:28:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:22,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:22,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:22,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:22,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:22,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:28:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:22,716 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 11:28:22,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:22,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:22,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042810189] [2022-11-16 11:28:22,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042810189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:22,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:22,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:28:22,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978586525] [2022-11-16 11:28:22,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:22,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:22,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:22,719 INFO L87 Difference]: Start difference. First operand 1038 states and 3475 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 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 11:28:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:23,625 INFO L93 Difference]: Finished difference Result 2054 states and 6905 transitions. [2022-11-16 11:28:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 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 11:28:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:23,642 INFO L225 Difference]: With dead ends: 2054 [2022-11-16 11:28:23,643 INFO L226 Difference]: Without dead ends: 2054 [2022-11-16 11:28:23,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:23,644 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:23,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 12 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:28:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-11-16 11:28:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1039. [2022-11-16 11:28:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 829 states have (on average 4.191797346200241) internal successors, (3475), 1038 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3475 transitions. [2022-11-16 11:28:23,704 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3475 transitions. Word has length 5 [2022-11-16 11:28:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:23,704 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 3475 transitions. [2022-11-16 11:28:23,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 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 11:28:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3475 transitions. [2022-11-16 11:28:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:28:23,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:23,706 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:28:23,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:23,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:23,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -929354295, now seen corresponding path program 2 times [2022-11-16 11:28:23,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:23,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329811493] [2022-11-16 11:28:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:28:23,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:23,921 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:23,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:24,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:28:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:28:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:24,227 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:24,228 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 11:28:24,458 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 11:28:24,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:25,215 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 11:28:25,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329811493] [2022-11-16 11:28:25,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329811493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:25,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:25,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:28:25,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26482993] [2022-11-16 11:28:25,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:25,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:28:25,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:28:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:28:25,217 INFO L87 Difference]: Start difference. First operand 1039 states and 3475 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 11:28:29,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:31,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:33,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:35,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:38,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:40,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:42,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:44,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:28:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:47,662 INFO L93 Difference]: Finished difference Result 7140 states and 24079 transitions. [2022-11-16 11:28:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:28:47,664 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 11:28:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:47,707 INFO L225 Difference]: With dead ends: 7140 [2022-11-16 11:28:47,707 INFO L226 Difference]: Without dead ends: 7140 [2022-11-16 11:28:47,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:28:47,708 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1090 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 169 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:47,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 87 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1297 Invalid, 7 Unknown, 0 Unchecked, 21.0s Time] [2022-11-16 11:28:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2022-11-16 11:28:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 1050. [2022-11-16 11:28:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 840 states have (on average 4.16547619047619) internal successors, (3499), 1049 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3499 transitions. [2022-11-16 11:28:47,845 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3499 transitions. Word has length 6 [2022-11-16 11:28:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:47,845 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 3499 transitions. [2022-11-16 11:28:47,845 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 11:28:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3499 transitions. [2022-11-16 11:28:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:28:47,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:47,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:28:47,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:48,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:48,058 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:48,058 INFO L85 PathProgramCache]: Analyzing trace with hash -832972211, now seen corresponding path program 1 times [2022-11-16 11:28:48,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:48,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329502537] [2022-11-16 11:28:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:48,059 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 11:28:48,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:48,061 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:48,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:28:48,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:48,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:48,299 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 11:28:48,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 11:28:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:48,601 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 11:28:48,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 11:28:48,812 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 11:28:48,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 11:28:48,993 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 11:28:48,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:48,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:48,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329502537] [2022-11-16 11:28:48,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329502537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:48,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:48,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:48,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938152620] [2022-11-16 11:28:48,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:48,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:48,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:48,996 INFO L87 Difference]: Start difference. First operand 1050 states and 3499 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 11:28:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:49,270 INFO L93 Difference]: Finished difference Result 1053 states and 3509 transitions. [2022-11-16 11:28:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:28:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:49,277 INFO L225 Difference]: With dead ends: 1053 [2022-11-16 11:28:49,277 INFO L226 Difference]: Without dead ends: 1053 [2022-11-16 11:28:49,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:49,279 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:49,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-11-16 11:28:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-11-16 11:28:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1053. [2022-11-16 11:28:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 843 states have (on average 4.162514827995255) internal successors, (3509), 1052 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3509 transitions. [2022-11-16 11:28:49,348 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3509 transitions. Word has length 6 [2022-11-16 11:28:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:49,349 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 3509 transitions. [2022-11-16 11:28:49,350 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 11:28:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3509 transitions. [2022-11-16 11:28:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:28:49,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:49,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:28:49,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:49,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:49,564 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash -832972210, now seen corresponding path program 1 times [2022-11-16 11:28:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:49,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559787038] [2022-11-16 11:28:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:49,566 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 11:28:49,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:49,567 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:49,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:28:49,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:49,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:49,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:49,887 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:28:49,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:28:49,906 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 11:28:49,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:49,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:28:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:50,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:28:50,094 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 11:28:50,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:50,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559787038] [2022-11-16 11:28:50,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559787038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:50,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:50,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:50,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109803804] [2022-11-16 11:28:50,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:50,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:50,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:50,096 INFO L87 Difference]: Start difference. First operand 1053 states and 3509 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 11:28:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:50,502 INFO L93 Difference]: Finished difference Result 1003 states and 3362 transitions. [2022-11-16 11:28:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:28:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:50,511 INFO L225 Difference]: With dead ends: 1003 [2022-11-16 11:28:50,511 INFO L226 Difference]: Without dead ends: 1003 [2022-11-16 11:28:50,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:50,513 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:50,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-16 11:28:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-16 11:28:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2022-11-16 11:28:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 817 states have (on average 4.1150550795593634) internal successors, (3362), 1002 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3362 transitions. [2022-11-16 11:28:50,580 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3362 transitions. Word has length 6 [2022-11-16 11:28:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:50,581 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 3362 transitions. [2022-11-16 11:28:50,581 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 11:28:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3362 transitions. [2022-11-16 11:28:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:28:50,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:50,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:50,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:50,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:50,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1348407333, now seen corresponding path program 1 times [2022-11-16 11:28:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:50,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479884439] [2022-11-16 11:28:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:50,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:50,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:50,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:50,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:51,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:28:51,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:51,162 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:28:51,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 11:28:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:51,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:28:51,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:51,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:28:51,360 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 11:28:51,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:51,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479884439] [2022-11-16 11:28:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479884439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:51,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:51,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:51,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552118468] [2022-11-16 11:28:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:51,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:51,363 INFO L87 Difference]: Start difference. First operand 1003 states and 3362 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 11:28:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:51,768 INFO L93 Difference]: Finished difference Result 1002 states and 3354 transitions. [2022-11-16 11:28:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:28:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:28:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:51,773 INFO L225 Difference]: With dead ends: 1002 [2022-11-16 11:28:51,773 INFO L226 Difference]: Without dead ends: 1002 [2022-11-16 11:28:51,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:51,774 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:51,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 11:28:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-16 11:28:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-16 11:28:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 817 states have (on average 4.105263157894737) internal successors, (3354), 1001 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3354 transitions. [2022-11-16 11:28:51,806 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3354 transitions. Word has length 7 [2022-11-16 11:28:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:51,806 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 3354 transitions. [2022-11-16 11:28:51,806 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 11:28:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3354 transitions. [2022-11-16 11:28:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:28:51,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:51,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:51,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-16 11:28:52,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:52,021 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:52,021 INFO L85 PathProgramCache]: Analyzing trace with hash -52349683, now seen corresponding path program 1 times [2022-11-16 11:28:52,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:52,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332764321] [2022-11-16 11:28:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:52,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:52,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:52,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:52,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:28:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:52,245 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 11:28:52,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:52,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:52,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332764321] [2022-11-16 11:28:52,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332764321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:52,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:52,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:52,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3479781] [2022-11-16 11:28:52,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:52,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:52,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:52,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:52,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:52,247 INFO L87 Difference]: Start difference. First operand 1002 states and 3354 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:53,281 INFO L93 Difference]: Finished difference Result 1650 states and 5356 transitions. [2022-11-16 11:28:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:28:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:28:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:53,288 INFO L225 Difference]: With dead ends: 1650 [2022-11-16 11:28:53,288 INFO L226 Difference]: Without dead ends: 1650 [2022-11-16 11:28:53,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:28:53,289 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:53,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 13 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:28:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-16 11:28:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1319. [2022-11-16 11:28:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1134 states have (on average 3.945326278659612) internal successors, (4474), 1318 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 4474 transitions. [2022-11-16 11:28:53,342 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 4474 transitions. Word has length 7 [2022-11-16 11:28:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:53,342 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 4474 transitions. [2022-11-16 11:28:53,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 4474 transitions. [2022-11-16 11:28:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:28:53,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:53,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:53,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:53,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:53,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830684, now seen corresponding path program 1 times [2022-11-16 11:28:53,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:53,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513146645] [2022-11-16 11:28:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:53,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:53,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:53,559 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:53,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:28:53,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:53,801 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 11:28:53,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 11:28:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:53,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:28:53,974 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:28:53,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:28:54,051 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 11:28:54,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:54,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:54,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513146645] [2022-11-16 11:28:54,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513146645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:54,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:54,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:54,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371198234] [2022-11-16 11:28:54,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:54,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:54,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:54,053 INFO L87 Difference]: Start difference. First operand 1319 states and 4474 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 11:28:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:54,403 INFO L93 Difference]: Finished difference Result 1267 states and 4325 transitions. [2022-11-16 11:28:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:54,405 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 11:28:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:54,409 INFO L225 Difference]: With dead ends: 1267 [2022-11-16 11:28:54,409 INFO L226 Difference]: Without dead ends: 1267 [2022-11-16 11:28:54,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:54,410 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:54,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 11:28:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-16 11:28:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1263. [2022-11-16 11:28:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1102 states have (on average 3.9192377495462796) internal successors, (4319), 1262 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 4319 transitions. [2022-11-16 11:28:54,453 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 4319 transitions. Word has length 8 [2022-11-16 11:28:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:54,454 INFO L495 AbstractCegarLoop]: Abstraction has 1263 states and 4319 transitions. [2022-11-16 11:28:54,454 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 11:28:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 4319 transitions. [2022-11-16 11:28:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:28:54,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:54,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:54,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-16 11:28:54,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:54,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341199, now seen corresponding path program 1 times [2022-11-16 11:28:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340158186] [2022-11-16 11:28:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:54,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:54,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:54,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:54,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:28:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:54,904 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:28:54,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:28:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:54,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:28:55,026 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:28:55,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:28:55,118 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 11:28:55,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:55,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:55,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340158186] [2022-11-16 11:28:55,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340158186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:55,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:55,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:55,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532898589] [2022-11-16 11:28:55,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:55,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:55,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:55,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:55,121 INFO L87 Difference]: Start difference. First operand 1263 states and 4319 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 11:28:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:55,657 INFO L93 Difference]: Finished difference Result 1272 states and 4350 transitions. [2022-11-16 11:28:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:28:55,659 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 11:28:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:55,663 INFO L225 Difference]: With dead ends: 1272 [2022-11-16 11:28:55,663 INFO L226 Difference]: Without dead ends: 1272 [2022-11-16 11:28:55,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 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 11:28:55,664 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:55,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 42 Unchecked, 0.5s Time] [2022-11-16 11:28:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-11-16 11:28:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1272. [2022-11-16 11:28:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1111 states have (on average 3.9153915391539154) internal successors, (4350), 1271 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 4350 transitions. [2022-11-16 11:28:55,722 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 4350 transitions. Word has length 8 [2022-11-16 11:28:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:55,723 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 4350 transitions. [2022-11-16 11:28:55,723 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 11:28:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 4350 transitions. [2022-11-16 11:28:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:28:55,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:55,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:55,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:55,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:55,940 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341198, now seen corresponding path program 1 times [2022-11-16 11:28:55,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:55,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031018016] [2022-11-16 11:28:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:55,942 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 11:28:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:55,943 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:55,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:56,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:28:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:56,250 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:28:56,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:28:56,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:28:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:56,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:28:56,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:56,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:28:56,489 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 11:28:56,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:56,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:56,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031018016] [2022-11-16 11:28:56,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031018016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:56,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:56,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:56,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4317543] [2022-11-16 11:28:56,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:56,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:56,520 INFO L87 Difference]: Start difference. First operand 1272 states and 4350 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:56,929 INFO L93 Difference]: Finished difference Result 1849 states and 6164 transitions. [2022-11-16 11:28:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:56,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:28:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:56,939 INFO L225 Difference]: With dead ends: 1849 [2022-11-16 11:28:56,939 INFO L226 Difference]: Without dead ends: 1849 [2022-11-16 11:28:56,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:56,940 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:56,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 9 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-16 11:28:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2022-11-16 11:28:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1531. [2022-11-16 11:28:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1370 states have (on average 3.9364963503649637) internal successors, (5393), 1530 states have internal predecessors, (5393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 5393 transitions. [2022-11-16 11:28:56,998 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 5393 transitions. Word has length 8 [2022-11-16 11:28:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:56,999 INFO L495 AbstractCegarLoop]: Abstraction has 1531 states and 5393 transitions. [2022-11-16 11:28:56,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 5393 transitions. [2022-11-16 11:28:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:28:57,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:57,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:57,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:57,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:57,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1247016924, now seen corresponding path program 1 times [2022-11-16 11:28:57,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:57,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053361478] [2022-11-16 11:28:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:57,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:57,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:57,228 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:57,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:28:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:57,496 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 11:28:57,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:57,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053361478] [2022-11-16 11:28:57,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053361478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:57,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:57,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:57,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878620625] [2022-11-16 11:28:57,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:57,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:57,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:57,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:57,498 INFO L87 Difference]: Start difference. First operand 1531 states and 5393 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:58,659 INFO L93 Difference]: Finished difference Result 1586 states and 5046 transitions. [2022-11-16 11:28:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:28:58,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:28:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:58,668 INFO L225 Difference]: With dead ends: 1586 [2022-11-16 11:28:58,668 INFO L226 Difference]: Without dead ends: 1586 [2022-11-16 11:28:58,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:28:58,669 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:58,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 13 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:28:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-11-16 11:28:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1499. [2022-11-16 11:28:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1338 states have (on average 3.6524663677130045) internal successors, (4887), 1498 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4887 transitions. [2022-11-16 11:28:58,742 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4887 transitions. Word has length 9 [2022-11-16 11:28:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:58,742 INFO L495 AbstractCegarLoop]: Abstraction has 1499 states and 4887 transitions. [2022-11-16 11:28:58,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4887 transitions. [2022-11-16 11:28:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:28:58,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:58,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:58,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:58,957 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:28:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -425172721, now seen corresponding path program 1 times [2022-11-16 11:28:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:58,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856800471] [2022-11-16 11:28:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:58,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:58,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:58,960 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:28:58,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:59,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:28:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:59,315 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:28:59,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:28:59,369 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:28:59,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:28:59,401 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:28:59,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:28:59,424 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 11:28:59,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:59,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:59,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856800471] [2022-11-16 11:28:59,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856800471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:59,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:59,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:59,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750931913] [2022-11-16 11:28:59,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:59,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:59,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:59,427 INFO L87 Difference]: Start difference. First operand 1499 states and 4887 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 11:28:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:59,769 INFO L93 Difference]: Finished difference Result 1215 states and 3902 transitions. [2022-11-16 11:28:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:28:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:59,774 INFO L225 Difference]: With dead ends: 1215 [2022-11-16 11:28:59,774 INFO L226 Difference]: Without dead ends: 1215 [2022-11-16 11:28:59,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:59,775 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:59,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:28:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2022-11-16 11:28:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1215. [2022-11-16 11:28:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1116 states have (on average 3.496415770609319) internal successors, (3902), 1214 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3902 transitions. [2022-11-16 11:28:59,828 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3902 transitions. Word has length 10 [2022-11-16 11:28:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:59,829 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 3902 transitions. [2022-11-16 11:28:59,829 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 11:28:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3902 transitions. [2022-11-16 11:28:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:28:59,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:59,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:59,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:00,048 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -425172720, now seen corresponding path program 1 times [2022-11-16 11:29:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096747205] [2022-11-16 11:29:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:00,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:00,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:00,049 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:00,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:29:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:00,450 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:29:00,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:00,614 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:29:00,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:00,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:29:00,792 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:29:00,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:29:00,874 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:29:00,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:29:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:29:01,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:29:04,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096747205] [2022-11-16 11:29:04,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096747205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:04,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:04,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:29:04,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161681215] [2022-11-16 11:29:04,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:04,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:29:04,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:29:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:04,053 INFO L87 Difference]: Start difference. First operand 1215 states and 3902 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:06,906 INFO L93 Difference]: Finished difference Result 2736 states and 9351 transitions. [2022-11-16 11:29:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:29:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:06,916 INFO L225 Difference]: With dead ends: 2736 [2022-11-16 11:29:06,916 INFO L226 Difference]: Without dead ends: 2736 [2022-11-16 11:29:06,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:29:06,917 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 214 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:06,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 62 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 377 Invalid, 0 Unknown, 380 Unchecked, 2.4s Time] [2022-11-16 11:29:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2022-11-16 11:29:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 1520. [2022-11-16 11:29:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1421 states have (on average 3.58128078817734) internal successors, (5089), 1519 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5089 transitions. [2022-11-16 11:29:07,001 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5089 transitions. Word has length 10 [2022-11-16 11:29:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:07,002 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 5089 transitions. [2022-11-16 11:29:07,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5089 transitions. [2022-11-16 11:29:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:29:07,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:07,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:07,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:07,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:07,218 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash -465334900, now seen corresponding path program 1 times [2022-11-16 11:29:07,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:07,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27818372] [2022-11-16 11:29:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:07,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:07,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:07,221 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:07,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:07,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:29:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:07,477 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:29:07,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:29:07,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:07,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:29:07,585 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:29:07,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:29:07,685 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 11:29:07,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:07,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:07,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27818372] [2022-11-16 11:29:07,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27818372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:07,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:07,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:07,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986913692] [2022-11-16 11:29:07,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:07,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:07,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:07,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:07,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:07,687 INFO L87 Difference]: Start difference. First operand 1520 states and 5089 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 11:29:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:08,072 INFO L93 Difference]: Finished difference Result 1524 states and 5095 transitions. [2022-11-16 11:29:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:08,078 INFO L225 Difference]: With dead ends: 1524 [2022-11-16 11:29:08,079 INFO L226 Difference]: Without dead ends: 1524 [2022-11-16 11:29:08,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 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 11:29:08,079 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 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, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:08,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-16 11:29:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2022-11-16 11:29:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1524. [2022-11-16 11:29:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1425 states have (on average 3.575438596491228) internal successors, (5095), 1523 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 5095 transitions. [2022-11-16 11:29:08,145 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 5095 transitions. Word has length 10 [2022-11-16 11:29:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:08,146 INFO L495 AbstractCegarLoop]: Abstraction has 1524 states and 5095 transitions. [2022-11-16 11:29:08,146 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 11:29:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 5095 transitions. [2022-11-16 11:29:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:29:08,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:08,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:08,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:08,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:08,361 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash 3272723, now seen corresponding path program 1 times [2022-11-16 11:29:08,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:08,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578409277] [2022-11-16 11:29:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:08,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:08,364 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:08,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:29:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:08,531 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 11:29:08,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:08,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:08,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578409277] [2022-11-16 11:29:08,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578409277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:08,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:08,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:08,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7787586] [2022-11-16 11:29:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:08,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:08,534 INFO L87 Difference]: Start difference. First operand 1524 states and 5095 transitions. Second operand has 3 states, 2 states have (on average 5.0) 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 11:29:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:08,854 INFO L93 Difference]: Finished difference Result 1220 states and 3799 transitions. [2022-11-16 11:29:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:08,859 INFO L225 Difference]: With dead ends: 1220 [2022-11-16 11:29:08,859 INFO L226 Difference]: Without dead ends: 1220 [2022-11-16 11:29:08,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 11:29:08,860 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:08,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:29:08,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-11-16 11:29:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1220. [2022-11-16 11:29:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1157 states have (on average 3.2834917891097666) internal successors, (3799), 1219 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3799 transitions. [2022-11-16 11:29:08,895 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3799 transitions. Word has length 10 [2022-11-16 11:29:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:08,896 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 3799 transitions. [2022-11-16 11:29:08,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) 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 11:29:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3799 transitions. [2022-11-16 11:29:08,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:29:08,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:08,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:08,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:09,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:09,111 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2826511, now seen corresponding path program 1 times [2022-11-16 11:29:09,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:09,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798656978] [2022-11-16 11:29:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:09,112 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 11:29:09,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:09,114 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:09,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:29:09,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:09,368 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:29:09,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:29:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:09,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:29:09,486 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:29:09,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:29:09,590 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 11:29:09,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:09,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:09,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798656978] [2022-11-16 11:29:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798656978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:09,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:09,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:09,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115523399] [2022-11-16 11:29:09,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:09,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:09,592 INFO L87 Difference]: Start difference. First operand 1220 states and 3799 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 11:29:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:09,993 INFO L93 Difference]: Finished difference Result 1222 states and 3803 transitions. [2022-11-16 11:29:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:09,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:09,998 INFO L225 Difference]: With dead ends: 1222 [2022-11-16 11:29:09,998 INFO L226 Difference]: Without dead ends: 1222 [2022-11-16 11:29:09,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 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 11:29:09,999 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:09,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-16 11:29:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-11-16 11:29:10,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2022-11-16 11:29:10,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1159 states have (on average 3.281276962899051) internal successors, (3803), 1221 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3803 transitions. [2022-11-16 11:29:10,027 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3803 transitions. Word has length 10 [2022-11-16 11:29:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:10,027 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 3803 transitions. [2022-11-16 11:29:10,028 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 11:29:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3803 transitions. [2022-11-16 11:29:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:10,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:10,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:10,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:10,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:10,243 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -295438054, now seen corresponding path program 1 times [2022-11-16 11:29:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:10,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25009636] [2022-11-16 11:29:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:10,244 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 11:29:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:10,246 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:10,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:29:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:29:10,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:29:10,855 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:10,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25009636] [2022-11-16 11:29:10,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25009636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:10,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:10,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:29:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893269065] [2022-11-16 11:29:10,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:10,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:29:10,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:29:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:10,858 INFO L87 Difference]: Start difference. First operand 1222 states and 3803 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11:29:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:15,513 INFO L93 Difference]: Finished difference Result 2126 states and 6547 transitions. [2022-11-16 11:29:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:29:15,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11:29:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:15,520 INFO L225 Difference]: With dead ends: 2126 [2022-11-16 11:29:15,520 INFO L226 Difference]: Without dead ends: 2126 [2022-11-16 11:29:15,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:29:15,521 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 309 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:15,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 73 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 11:29:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-11-16 11:29:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1716. [2022-11-16 11:29:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1653 states have (on average 3.3762855414398065) internal successors, (5581), 1715 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5581 transitions. [2022-11-16 11:29:15,567 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5581 transitions. Word has length 11 [2022-11-16 11:29:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:15,567 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 5581 transitions. [2022-11-16 11:29:15,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11:29:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5581 transitions. [2022-11-16 11:29:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:15,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:15,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:15,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:15,783 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash -294953489, now seen corresponding path program 1 times [2022-11-16 11:29:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:15,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87491934] [2022-11-16 11:29:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:15,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:15,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:15,785 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:15,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:16,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:29:16,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:16,156 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:29:16,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:29:16,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:16,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:29:16,304 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:29:16,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:29:16,387 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 11:29:16,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:16,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87491934] [2022-11-16 11:29:16,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87491934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:16,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:16,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:16,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682333518] [2022-11-16 11:29:16,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:16,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:16,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:16,390 INFO L87 Difference]: Start difference. First operand 1716 states and 5581 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 11:29:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:16,698 INFO L93 Difference]: Finished difference Result 1716 states and 5620 transitions. [2022-11-16 11:29:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:16,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:16,706 INFO L225 Difference]: With dead ends: 1716 [2022-11-16 11:29:16,707 INFO L226 Difference]: Without dead ends: 1716 [2022-11-16 11:29:16,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 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 11:29:16,708 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:16,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-16 11:29:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-11-16 11:29:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1716. [2022-11-16 11:29:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1653 states have (on average 3.399879007864489) internal successors, (5620), 1715 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5620 transitions. [2022-11-16 11:29:16,759 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5620 transitions. Word has length 11 [2022-11-16 11:29:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:16,759 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 5620 transitions. [2022-11-16 11:29:16,760 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 11:29:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5620 transitions. [2022-11-16 11:29:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:16,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:16,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:16,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:16,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:16,976 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash -294953488, now seen corresponding path program 1 times [2022-11-16 11:29:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721875891] [2022-11-16 11:29:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:16,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:16,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:16,979 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:17,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:29:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:17,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:17,514 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2022-11-16 11:29:17,514 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 17 treesize of output 40 [2022-11-16 11:29:17,543 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 186 treesize of output 178 [2022-11-16 11:29:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:17,840 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:29:17,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2022-11-16 11:29:17,950 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:29:17,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:29:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:29:18,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:29:24,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:24,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721875891] [2022-11-16 11:29:24,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721875891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:24,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:24,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:29:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892401390] [2022-11-16 11:29:24,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:24,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:29:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:29:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:29:24,133 INFO L87 Difference]: Start difference. First operand 1716 states and 5620 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:24,680 INFO L93 Difference]: Finished difference Result 2766 states and 9371 transitions. [2022-11-16 11:29:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:29:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:24,689 INFO L225 Difference]: With dead ends: 2766 [2022-11-16 11:29:24,689 INFO L226 Difference]: Without dead ends: 2766 [2022-11-16 11:29:24,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:29:24,690 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:24,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 337 Unchecked, 0.5s Time] [2022-11-16 11:29:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-11-16 11:29:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1837. [2022-11-16 11:29:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1774 states have (on average 3.6386696730552424) internal successors, (6455), 1836 states have internal predecessors, (6455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6455 transitions. [2022-11-16 11:29:24,771 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6455 transitions. Word has length 11 [2022-11-16 11:29:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:24,771 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 6455 transitions. [2022-11-16 11:29:24,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6455 transitions. [2022-11-16 11:29:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:24,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:24,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:24,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:24,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:24,973 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:24,974 INFO L85 PathProgramCache]: Analyzing trace with hash 101446031, now seen corresponding path program 1 times [2022-11-16 11:29:24,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:24,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138874554] [2022-11-16 11:29:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:24,974 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 11:29:24,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:24,976 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:24,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:25,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:29:25,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:25,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:25,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:25,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138874554] [2022-11-16 11:29:25,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138874554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:25,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:25,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:29:25,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595588976] [2022-11-16 11:29:25,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:29:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:29:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:29:25,256 INFO L87 Difference]: Start difference. First operand 1837 states and 6455 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:25,991 INFO L93 Difference]: Finished difference Result 1785 states and 6223 transitions. [2022-11-16 11:29:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:25,997 INFO L225 Difference]: With dead ends: 1785 [2022-11-16 11:29:25,997 INFO L226 Difference]: Without dead ends: 1785 [2022-11-16 11:29:25,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:29:25,998 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:25,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 13 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:29:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-11-16 11:29:26,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1770. [2022-11-16 11:29:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1707 states have (on average 3.637961335676626) internal successors, (6210), 1769 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6210 transitions. [2022-11-16 11:29:26,048 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6210 transitions. Word has length 11 [2022-11-16 11:29:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:26,049 INFO L495 AbstractCegarLoop]: Abstraction has 1770 states and 6210 transitions. [2022-11-16 11:29:26,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6210 transitions. [2022-11-16 11:29:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:29:26,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:26,050 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 11:29:26,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:26,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:26,264 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:29:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2094627305, now seen corresponding path program 3 times [2022-11-16 11:29:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:26,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737042571] [2022-11-16 11:29:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:29:26,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:26,265 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:29:26,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:26,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:29:26,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:29:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:26,684 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:29:26,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:27,284 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 11:29:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:31,200 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 11:29:31,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:31,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737042571] [2022-11-16 11:29:31,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737042571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:31,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:31,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 11:29:31,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908827010] [2022-11-16 11:29:31,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:29:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:31,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:29:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:29:31,203 INFO L87 Difference]: Start difference. First operand 1770 states and 6210 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 11:29:50,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:29:52,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:29:54,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:29:56,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:29:58,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:00,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:02,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:04,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:06,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:08,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:15,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:17,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:19,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:21,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:23,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:25,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:27,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:29,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:31,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:33,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:42,609 INFO L93 Difference]: Finished difference Result 12214 states and 44359 transitions. [2022-11-16 11:30:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:30:42,612 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 11:30:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:42,654 INFO L225 Difference]: With dead ends: 12214 [2022-11-16 11:30:42,654 INFO L226 Difference]: Without dead ends: 12214 [2022-11-16 11:30:42,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:30:42,655 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2511 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 4620 mSolverCounterSat, 387 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 5027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 4620 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:42,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2511 Valid, 393 Invalid, 5027 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [387 Valid, 4620 Invalid, 20 Unknown, 0 Unchecked, 55.1s Time] [2022-11-16 11:30:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12214 states. [2022-11-16 11:30:42,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12214 to 1804. [2022-11-16 11:30:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1741 states have (on average 3.6059735784032165) internal successors, (6278), 1803 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6278 transitions. [2022-11-16 11:30:42,825 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6278 transitions. Word has length 12 [2022-11-16 11:30:42,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:42,825 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 6278 transitions. [2022-11-16 11:30:42,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6278 transitions. [2022-11-16 11:30:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:42,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:42,827 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:42,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:30:43,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:43,033 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:30:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash 228353138, now seen corresponding path program 1 times [2022-11-16 11:30:43,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:43,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814024632] [2022-11-16 11:30:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:43,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:43,035 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:30:43,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:30:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:43,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:30:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:43,403 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:30:43,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:30:43,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:30:43,704 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 11:30:43,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:44,325 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 11:30:44,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:44,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814024632] [2022-11-16 11:30:44,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814024632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:44,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:44,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 11:30:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281361001] [2022-11-16 11:30:44,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:30:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:30:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:30:44,327 INFO L87 Difference]: Start difference. First operand 1804 states and 6278 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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 11:30:48,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:50,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:52,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:54,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:55,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:58,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:31:00,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:31:02,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:31:03,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:31:05,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:31:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:10,345 INFO L93 Difference]: Finished difference Result 8235 states and 29604 transitions. [2022-11-16 11:31:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:31:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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 12 [2022-11-16 11:31:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:10,373 INFO L225 Difference]: With dead ends: 8235 [2022-11-16 11:31:10,374 INFO L226 Difference]: Without dead ends: 8235 [2022-11-16 11:31:10,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:31:10,375 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 603 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 111 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:10,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 108 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1296 Invalid, 3 Unknown, 0 Unchecked, 24.2s Time] [2022-11-16 11:31:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2022-11-16 11:31:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 1810. [2022-11-16 11:31:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1747 states have (on average 3.5970234688036635) internal successors, (6284), 1809 states have internal predecessors, (6284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6284 transitions. [2022-11-16 11:31:10,533 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6284 transitions. Word has length 12 [2022-11-16 11:31:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:10,534 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 6284 transitions. [2022-11-16 11:31:10,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 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 11:31:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6284 transitions. [2022-11-16 11:31:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:31:10,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:10,535 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:10,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:10,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:10,749 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash -822107536, now seen corresponding path program 2 times [2022-11-16 11:31:10,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:10,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330454515] [2022-11-16 11:31:10,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:10,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:10,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:10,751 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:10,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:10,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:31:10,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:10,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:31:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:11,085 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:31:11,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:11,259 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:31:11,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:11,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:31:11,444 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:31:11,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:31:11,514 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:31:11,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:31:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:31:11,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:11,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:11,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330454515] [2022-11-16 11:31:11,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330454515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:11,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:11,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:11,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006316906] [2022-11-16 11:31:11,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:11,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:11,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:11,610 INFO L87 Difference]: Start difference. First operand 1810 states and 6284 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:12,278 INFO L93 Difference]: Finished difference Result 2236 states and 7626 transitions. [2022-11-16 11:31:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:31:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:12,285 INFO L225 Difference]: With dead ends: 2236 [2022-11-16 11:31:12,285 INFO L226 Difference]: Without dead ends: 2236 [2022-11-16 11:31:12,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:31:12,286 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:12,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 7 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:31:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2022-11-16 11:31:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1486. [2022-11-16 11:31:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1423 states have (on average 3.539002108222066) internal successors, (5036), 1485 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 5036 transitions. [2022-11-16 11:31:12,353 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 5036 transitions. Word has length 12 [2022-11-16 11:31:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:12,353 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 5036 transitions. [2022-11-16 11:31:12,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 5036 transitions. [2022-11-16 11:31:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:31:12,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:12,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:12,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:12,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:12,568 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash -553637026, now seen corresponding path program 1 times [2022-11-16 11:31:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:12,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117925505] [2022-11-16 11:31:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:12,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:12,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:12,570 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:12,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:31:12,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:12,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:31:12,862 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:31:12,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:31:12,885 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 11:31:12,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:12,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117925505] [2022-11-16 11:31:12,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117925505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:12,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:12,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645043515] [2022-11-16 11:31:12,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:12,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:12,888 INFO L87 Difference]: Start difference. First operand 1486 states and 5036 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:13,232 INFO L93 Difference]: Finished difference Result 1201 states and 3915 transitions. [2022-11-16 11:31:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:31:13,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:31:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:13,236 INFO L225 Difference]: With dead ends: 1201 [2022-11-16 11:31:13,236 INFO L226 Difference]: Without dead ends: 1201 [2022-11-16 11:31:13,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 11:31:13,237 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:13,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:31:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-11-16 11:31:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2022-11-16 11:31:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1160 states have (on average 3.375) internal successors, (3915), 1200 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3915 transitions. [2022-11-16 11:31:13,262 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3915 transitions. Word has length 12 [2022-11-16 11:31:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:13,262 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 3915 transitions. [2022-11-16 11:31:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3915 transitions. [2022-11-16 11:31:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:31:13,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:13,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:13,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:13,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:13,464 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -553637025, now seen corresponding path program 1 times [2022-11-16 11:31:13,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:13,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172049210] [2022-11-16 11:31:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:13,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:13,466 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:13,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:13,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:31:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:13,853 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:31:13,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:31:13,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:13,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:31:13,973 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:31:13,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:31:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:14,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:14,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:31:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:14,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:14,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172049210] [2022-11-16 11:31:14,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172049210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:14,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:14,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:31:14,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275690381] [2022-11-16 11:31:14,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:14,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:31:14,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:14,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:31:14,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:31:14,768 INFO L87 Difference]: Start difference. First operand 1201 states and 3915 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:19,555 INFO L93 Difference]: Finished difference Result 1833 states and 5756 transitions. [2022-11-16 11:31:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:31:19,556 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:31:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:19,561 INFO L225 Difference]: With dead ends: 1833 [2022-11-16 11:31:19,561 INFO L226 Difference]: Without dead ends: 1833 [2022-11-16 11:31:19,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:31:19,563 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:19,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 57 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 341 Invalid, 0 Unknown, 142 Unchecked, 2.0s Time] [2022-11-16 11:31:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-16 11:31:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1266. [2022-11-16 11:31:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1225 states have (on average 3.3183673469387753) internal successors, (4065), 1265 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4065 transitions. [2022-11-16 11:31:19,601 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4065 transitions. Word has length 12 [2022-11-16 11:31:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:19,601 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 4065 transitions. [2022-11-16 11:31:19,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4065 transitions. [2022-11-16 11:31:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:31:19,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:19,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:19,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:19,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:19,817 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:19,818 INFO L85 PathProgramCache]: Analyzing trace with hash -510649814, now seen corresponding path program 1 times [2022-11-16 11:31:19,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:19,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191130395] [2022-11-16 11:31:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:19,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:19,820 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:19,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:31:20,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:20,133 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:31:20,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:31:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:20,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:31:20,257 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:31:20,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:31:20,386 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 11:31:20,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:20,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:20,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191130395] [2022-11-16 11:31:20,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191130395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:20,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:20,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:20,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241815100] [2022-11-16 11:31:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:20,389 INFO L87 Difference]: Start difference. First operand 1266 states and 4065 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 11:31:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:20,709 INFO L93 Difference]: Finished difference Result 1268 states and 4068 transitions. [2022-11-16 11:31:20,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:20,710 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 11:31:20,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:20,713 INFO L225 Difference]: With dead ends: 1268 [2022-11-16 11:31:20,713 INFO L226 Difference]: Without dead ends: 1268 [2022-11-16 11:31:20,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 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 11:31:20,714 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:20,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-16 11:31:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-11-16 11:31:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1268. [2022-11-16 11:31:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1227 states have (on average 3.315403422982885) internal successors, (4068), 1267 states have internal predecessors, (4068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 4068 transitions. [2022-11-16 11:31:20,753 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 4068 transitions. Word has length 12 [2022-11-16 11:31:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:20,753 INFO L495 AbstractCegarLoop]: Abstraction has 1268 states and 4068 transitions. [2022-11-16 11:31:20,753 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 11:31:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 4068 transitions. [2022-11-16 11:31:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:20,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:20,754 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:20,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-16 11:31:20,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:20,958 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash 284969104, now seen corresponding path program 2 times [2022-11-16 11:31:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:20,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186382540] [2022-11-16 11:31:20,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:20,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:20,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:20,960 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:20,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:21,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:31:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:31:21,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:21,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:21,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:21,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:21,297 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:31:21,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:31:21,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:31:21,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:21,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:31:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:21,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:31:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:31:21,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:21,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186382540] [2022-11-16 11:31:21,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186382540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:21,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:21,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:21,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182080838] [2022-11-16 11:31:21,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:21,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:21,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:21,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:21,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:21,560 INFO L87 Difference]: Start difference. First operand 1268 states and 4068 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:21,887 INFO L93 Difference]: Finished difference Result 1212 states and 3886 transitions. [2022-11-16 11:31:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:31:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:31:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:21,891 INFO L225 Difference]: With dead ends: 1212 [2022-11-16 11:31:21,891 INFO L226 Difference]: Without dead ends: 1212 [2022-11-16 11:31:21,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:21,892 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:21,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-11-16 11:31:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-11-16 11:31:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 877. [2022-11-16 11:31:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 845 states have (on average 3.1834319526627217) internal successors, (2690), 876 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2690 transitions. [2022-11-16 11:31:21,919 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2690 transitions. Word has length 13 [2022-11-16 11:31:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:21,919 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 2690 transitions. [2022-11-16 11:31:21,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2690 transitions. [2022-11-16 11:31:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:21,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:21,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:21,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:22,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:22,134 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:22,134 INFO L85 PathProgramCache]: Analyzing trace with hash -447785283, now seen corresponding path program 1 times [2022-11-16 11:31:22,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:22,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435724654] [2022-11-16 11:31:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:22,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:22,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:22,136 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:22,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:22,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:31:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:22,564 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:31:22,565 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 15 treesize of output 50 [2022-11-16 11:31:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:22,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:31:22,713 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:31:22,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 11:31:22,993 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 11:31:22,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:22,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435724654] [2022-11-16 11:31:22,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435724654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:22,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:22,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315414635] [2022-11-16 11:31:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:31:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:31:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:22,997 INFO L87 Difference]: Start difference. First operand 877 states and 2690 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:23,258 INFO L93 Difference]: Finished difference Result 883 states and 2716 transitions. [2022-11-16 11:31:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:31:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:23,261 INFO L225 Difference]: With dead ends: 883 [2022-11-16 11:31:23,261 INFO L226 Difference]: Without dead ends: 883 [2022-11-16 11:31:23,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:23,262 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:23,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-16 11:31:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-16 11:31:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2022-11-16 11:31:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 851 states have (on average 3.191539365452409) internal successors, (2716), 882 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 2716 transitions. [2022-11-16 11:31:23,288 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 2716 transitions. Word has length 13 [2022-11-16 11:31:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:23,288 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 2716 transitions. [2022-11-16 11:31:23,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 2716 transitions. [2022-11-16 11:31:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:23,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:23,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:23,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-16 11:31:23,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:23,489 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:23,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:23,490 INFO L85 PathProgramCache]: Analyzing trace with hash -450870093, now seen corresponding path program 2 times [2022-11-16 11:31:23,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:23,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21952739] [2022-11-16 11:31:23,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:23,491 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 11:31:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:23,492 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:23,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:23,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:31:23,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:23,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:31:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:23,824 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:31:23,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 41 [2022-11-16 11:31:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:23,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:31:23,971 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:31:23,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 11:31:24,255 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 11:31:24,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:24,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:24,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21952739] [2022-11-16 11:31:24,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21952739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:24,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:24,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:24,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732903638] [2022-11-16 11:31:24,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:24,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:31:24,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:24,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:31:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:24,257 INFO L87 Difference]: Start difference. First operand 883 states and 2716 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:24,520 INFO L93 Difference]: Finished difference Result 890 states and 2752 transitions. [2022-11-16 11:31:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:31:24,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:24,524 INFO L225 Difference]: With dead ends: 890 [2022-11-16 11:31:24,524 INFO L226 Difference]: Without dead ends: 890 [2022-11-16 11:31:24,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:24,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:24,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-16 11:31:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-16 11:31:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 881. [2022-11-16 11:31:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 849 states have (on average 3.191990577149588) internal successors, (2710), 880 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2710 transitions. [2022-11-16 11:31:24,539 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2710 transitions. Word has length 13 [2022-11-16 11:31:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:24,539 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 2710 transitions. [2022-11-16 11:31:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2710 transitions. [2022-11-16 11:31:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:24,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:24,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:24,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:24,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:24,750 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:24,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash -451305333, now seen corresponding path program 3 times [2022-11-16 11:31:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:24,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358308114] [2022-11-16 11:31:24,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:31:24,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:24,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:24,752 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:24,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:24,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:31:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:24,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:31:24,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:25,074 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:31:25,074 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 15 treesize of output 41 [2022-11-16 11:31:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:25,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:31:25,219 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:31:25,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 11:31:25,474 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 11:31:25,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:25,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:25,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358308114] [2022-11-16 11:31:25,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358308114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:25,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:25,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:25,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877392209] [2022-11-16 11:31:25,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:25,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:31:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:25,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:31:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:25,476 INFO L87 Difference]: Start difference. First operand 881 states and 2710 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:25,752 INFO L93 Difference]: Finished difference Result 885 states and 2732 transitions. [2022-11-16 11:31:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:31:25,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:25,757 INFO L225 Difference]: With dead ends: 885 [2022-11-16 11:31:25,757 INFO L226 Difference]: Without dead ends: 885 [2022-11-16 11:31:25,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:25,758 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:25,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-11-16 11:31:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-16 11:31:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 877. [2022-11-16 11:31:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 845 states have (on average 3.188165680473373) internal successors, (2694), 876 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2694 transitions. [2022-11-16 11:31:25,780 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2694 transitions. Word has length 13 [2022-11-16 11:31:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:25,780 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 2694 transitions. [2022-11-16 11:31:25,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2694 transitions. [2022-11-16 11:31:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:25,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:25,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:25,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:25,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:25,996 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:25,996 INFO L85 PathProgramCache]: Analyzing trace with hash 17571215, now seen corresponding path program 1 times [2022-11-16 11:31:25,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:25,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48391857] [2022-11-16 11:31:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:25,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:25,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:25,997 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:26,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:26,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:31:26,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:26,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:31:26,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:31:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:26,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:31:26,458 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:31:26,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:31:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:26,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:27,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:31:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:27,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:27,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48391857] [2022-11-16 11:31:27,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48391857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:27,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:27,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:31:27,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184125629] [2022-11-16 11:31:27,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:27,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:31:27,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:27,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:31:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:31:27,259 INFO L87 Difference]: Start difference. First operand 877 states and 2694 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 11:31:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:29,243 INFO L93 Difference]: Finished difference Result 1026 states and 3073 transitions. [2022-11-16 11:31:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:31:29,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 11:31:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:29,247 INFO L225 Difference]: With dead ends: 1026 [2022-11-16 11:31:29,247 INFO L226 Difference]: Without dead ends: 1026 [2022-11-16 11:31:29,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:31:29,247 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:29,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 38 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 196 Invalid, 0 Unknown, 62 Unchecked, 1.2s Time] [2022-11-16 11:31:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-11-16 11:31:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 887. [2022-11-16 11:31:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 855 states have (on average 3.191812865497076) internal successors, (2729), 886 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2729 transitions. [2022-11-16 11:31:29,270 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2729 transitions. Word has length 13 [2022-11-16 11:31:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:29,270 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 2729 transitions. [2022-11-16 11:31:29,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 11:31:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2729 transitions. [2022-11-16 11:31:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:29,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:29,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:29,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:29,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:29,471 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash 17130395, now seen corresponding path program 2 times [2022-11-16 11:31:29,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:29,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919717384] [2022-11-16 11:31:29,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:29,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:29,474 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:29,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:29,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:31:29,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:31:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:29,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:31:29,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:31:29,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:29,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:31:29,815 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:31:29,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:31:29,940 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 11:31:29,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:29,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:29,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919717384] [2022-11-16 11:31:29,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919717384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:29,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:29,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:29,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071182497] [2022-11-16 11:31:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:29,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:31:29,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:31:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:29,943 INFO L87 Difference]: Start difference. First operand 887 states and 2729 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:30,651 INFO L93 Difference]: Finished difference Result 1198 states and 3759 transitions. [2022-11-16 11:31:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:30,656 INFO L225 Difference]: With dead ends: 1198 [2022-11-16 11:31:30,656 INFO L226 Difference]: Without dead ends: 1198 [2022-11-16 11:31:30,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:31:30,656 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 138 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:30,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 7 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:31:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-11-16 11:31:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 960. [2022-11-16 11:31:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 928 states have (on average 3.4342672413793105) internal successors, (3187), 959 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 11:31:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3187 transitions. [2022-11-16 11:31:30,674 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3187 transitions. Word has length 13 [2022-11-16 11:31:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:30,674 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 3187 transitions. [2022-11-16 11:31:30,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:31:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3187 transitions. [2022-11-16 11:31:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:30,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:30,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:30,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:30,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:30,875 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:30,876 INFO L85 PathProgramCache]: Analyzing trace with hash 17128909, now seen corresponding path program 1 times [2022-11-16 11:31:30,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:30,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398809572] [2022-11-16 11:31:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:30,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:30,877 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:30,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:31,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:31:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:31,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:31,463 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:31,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398809572] [2022-11-16 11:31:31,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398809572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:31,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:31,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 11:31:31,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856206985] [2022-11-16 11:31:31,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:31,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:31:31,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:31,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:31:31,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:31:31,466 INFO L87 Difference]: Start difference. First operand 960 states and 3187 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:33,556 INFO L93 Difference]: Finished difference Result 1132 states and 3473 transitions. [2022-11-16 11:31:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:31:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:31:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:33,560 INFO L225 Difference]: With dead ends: 1132 [2022-11-16 11:31:33,561 INFO L226 Difference]: Without dead ends: 1132 [2022-11-16 11:31:33,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:31:33,561 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 241 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:33,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 41 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:31:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-11-16 11:31:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 939. [2022-11-16 11:31:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 907 states have (on average 3.306504961411246) internal successors, (2999), 938 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2999 transitions. [2022-11-16 11:31:33,590 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2999 transitions. Word has length 13 [2022-11-16 11:31:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:33,590 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 2999 transitions. [2022-11-16 11:31:33,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2999 transitions. [2022-11-16 11:31:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:33,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:33,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:33,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:33,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:33,807 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:33,807 INFO L85 PathProgramCache]: Analyzing trace with hash 17134024, now seen corresponding path program 1 times [2022-11-16 11:31:33,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:33,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842643923] [2022-11-16 11:31:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:33,809 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:33,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:31:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:34,220 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:31:34,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:31:34,265 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:31:34,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 11:31:34,321 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:31:34,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 11:31:34,435 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 11:31:34,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:34,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842643923] [2022-11-16 11:31:34,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842643923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:34,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:34,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402901666] [2022-11-16 11:31:34,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:34,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:34,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:34,437 INFO L87 Difference]: Start difference. First operand 939 states and 2999 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:34,716 INFO L93 Difference]: Finished difference Result 902 states and 2898 transitions. [2022-11-16 11:31:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:31:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:31:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:34,719 INFO L225 Difference]: With dead ends: 902 [2022-11-16 11:31:34,719 INFO L226 Difference]: Without dead ends: 902 [2022-11-16 11:31:34,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:34,720 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:34,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 11:31:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-16 11:31:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-11-16 11:31:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 879 states have (on average 3.2969283276450514) internal successors, (2898), 901 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2898 transitions. [2022-11-16 11:31:34,736 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2898 transitions. Word has length 13 [2022-11-16 11:31:34,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:34,736 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 2898 transitions. [2022-11-16 11:31:34,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2898 transitions. [2022-11-16 11:31:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:34,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:34,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:34,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:34,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:34,937 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:34,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash 17133774, now seen corresponding path program 1 times [2022-11-16 11:31:34,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:34,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011124851] [2022-11-16 11:31:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:34,938 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 11:31:34,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:34,940 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:31:35,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:35,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:35,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:35,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011124851] [2022-11-16 11:31:35,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011124851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:35,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:35,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:31:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413001134] [2022-11-16 11:31:35,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:35,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:31:35,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:31:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:31:35,605 INFO L87 Difference]: Start difference. First operand 902 states and 2898 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 11:31:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:38,976 INFO L93 Difference]: Finished difference Result 1002 states and 3021 transitions. [2022-11-16 11:31:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:31:38,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 11:31:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:38,980 INFO L225 Difference]: With dead ends: 1002 [2022-11-16 11:31:38,980 INFO L226 Difference]: Without dead ends: 1002 [2022-11-16 11:31:38,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:31:38,981 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 206 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:38,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 71 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 11:31:38,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-16 11:31:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 940. [2022-11-16 11:31:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 917 states have (on average 3.1821155943293347) internal successors, (2918), 939 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2918 transitions. [2022-11-16 11:31:39,010 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2918 transitions. Word has length 13 [2022-11-16 11:31:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 2918 transitions. [2022-11-16 11:31:39,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 11:31:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2918 transitions. [2022-11-16 11:31:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:39,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:39,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:39,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:39,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:39,212 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1226083620, now seen corresponding path program 2 times [2022-11-16 11:31:39,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:39,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673912602] [2022-11-16 11:31:39,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:39,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:39,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:39,216 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:39,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:39,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:31:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:31:39,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:39,684 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:31:39,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 11:31:39,852 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:31:39,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:40,014 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:31:40,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:31:40,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:31:40,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:40,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:31:40,103 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:31:40,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:31:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:31:40,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:31:47,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673912602] [2022-11-16 11:31:47,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673912602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:47,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:47,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:31:47,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021008570] [2022-11-16 11:31:47,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:47,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:31:47,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:31:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=191, Unknown=1, NotChecked=0, Total=240 [2022-11-16 11:31:47,512 INFO L87 Difference]: Start difference. First operand 940 states and 2918 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:50,274 INFO L93 Difference]: Finished difference Result 1873 states and 5855 transitions. [2022-11-16 11:31:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:31:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:31:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:50,280 INFO L225 Difference]: With dead ends: 1873 [2022-11-16 11:31:50,280 INFO L226 Difference]: Without dead ends: 1873 [2022-11-16 11:31:50,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=65, Invalid=240, Unknown=1, NotChecked=0, Total=306 [2022-11-16 11:31:50,281 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 249 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:50,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 78 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 439 Invalid, 0 Unknown, 285 Unchecked, 2.6s Time] [2022-11-16 11:31:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-11-16 11:31:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1022. [2022-11-16 11:31:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 999 states have (on average 3.2822822822822824) internal successors, (3279), 1021 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3279 transitions. [2022-11-16 11:31:50,306 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3279 transitions. Word has length 14 [2022-11-16 11:31:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:50,306 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 3279 transitions. [2022-11-16 11:31:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3279 transitions. [2022-11-16 11:31:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:50,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:50,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:50,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:50,524 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash 544820369, now seen corresponding path program 1 times [2022-11-16 11:31:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:50,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963602103] [2022-11-16 11:31:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:50,525 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:50,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:50,526 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:50,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:31:50,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:51,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:31:51,043 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 11:31:51,220 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:31:51,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:51,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:51,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:31:51,371 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:31:51,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:31:51,452 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:31:51,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:31:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:51,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:54,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963602103] [2022-11-16 11:31:54,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963602103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:54,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:54,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:31:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005727130] [2022-11-16 11:31:54,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:31:54,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:31:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:31:54,705 INFO L87 Difference]: Start difference. First operand 1022 states and 3279 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:55,681 INFO L93 Difference]: Finished difference Result 1144 states and 3642 transitions. [2022-11-16 11:31:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:31:55,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:31:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:55,686 INFO L225 Difference]: With dead ends: 1144 [2022-11-16 11:31:55,686 INFO L226 Difference]: Without dead ends: 1144 [2022-11-16 11:31:55,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:31:55,698 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:55,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 95 Unchecked, 0.7s Time] [2022-11-16 11:31:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-11-16 11:31:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1104. [2022-11-16 11:31:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1081 states have (on average 3.2719703977798336) internal successors, (3537), 1103 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3537 transitions. [2022-11-16 11:31:55,718 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3537 transitions. Word has length 14 [2022-11-16 11:31:55,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:55,718 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 3537 transitions. [2022-11-16 11:31:55,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3537 transitions. [2022-11-16 11:31:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:55,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:55,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:55,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:55,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:55,920 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:55,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash 544820794, now seen corresponding path program 1 times [2022-11-16 11:31:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:55,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163432188] [2022-11-16 11:31:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:55,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:55,922 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:55,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:31:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:56,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:56,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 11:31:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:56,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:56,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163432188] [2022-11-16 11:31:56,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163432188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:56,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:56,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 11:31:56,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862680830] [2022-11-16 11:31:56,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:56,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:31:56,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:31:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:31:56,714 INFO L87 Difference]: Start difference. First operand 1104 states and 3537 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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 11:31:58,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:58,622 INFO L93 Difference]: Finished difference Result 1740 states and 5564 transitions. [2022-11-16 11:31:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:31:58,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:31:58,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:58,628 INFO L225 Difference]: With dead ends: 1740 [2022-11-16 11:31:58,628 INFO L226 Difference]: Without dead ends: 1740 [2022-11-16 11:31:58,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:31:58,629 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 257 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:58,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 34 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 11:31:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-11-16 11:31:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1212. [2022-11-16 11:31:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1189 states have (on average 3.6450798990748527) internal successors, (4334), 1211 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 4334 transitions. [2022-11-16 11:31:58,658 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 4334 transitions. Word has length 14 [2022-11-16 11:31:58,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:58,658 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 4334 transitions. [2022-11-16 11:31:58,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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 11:31:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 4334 transitions. [2022-11-16 11:31:58,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:58,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:58,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:58,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:58,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:58,876 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:31:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash 544820619, now seen corresponding path program 1 times [2022-11-16 11:31:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:58,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932287519] [2022-11-16 11:31:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:58,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:58,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:58,879 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:31:58,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:31:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:59,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:31:59,337 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:31:59,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:31:59,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:31:59,436 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:31:59,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:31:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:59,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:02,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:32:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:02,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:02,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932287519] [2022-11-16 11:32:02,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932287519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:02,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:02,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:32:02,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696329081] [2022-11-16 11:32:02,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:02,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:32:02,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:02,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:32:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=102, Unknown=1, NotChecked=0, Total=132 [2022-11-16 11:32:02,275 INFO L87 Difference]: Start difference. First operand 1212 states and 4334 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:05,753 INFO L93 Difference]: Finished difference Result 1526 states and 5296 transitions. [2022-11-16 11:32:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:32:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:32:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:05,759 INFO L225 Difference]: With dead ends: 1526 [2022-11-16 11:32:05,759 INFO L226 Difference]: Without dead ends: 1526 [2022-11-16 11:32:05,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=50, Invalid=159, Unknown=1, NotChecked=0, Total=210 [2022-11-16 11:32:05,760 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:05,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 79 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 184 Invalid, 0 Unknown, 122 Unchecked, 0.9s Time] [2022-11-16 11:32:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2022-11-16 11:32:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1284. [2022-11-16 11:32:05,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1261 states have (on average 3.6050753370341) internal successors, (4546), 1283 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4546 transitions. [2022-11-16 11:32:05,784 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4546 transitions. Word has length 14 [2022-11-16 11:32:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:05,785 INFO L495 AbstractCegarLoop]: Abstraction has 1284 states and 4546 transitions. [2022-11-16 11:32:05,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:05,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4546 transitions. [2022-11-16 11:32:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:32:05,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:05,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:05,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-16 11:32:06,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:06,002 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash 544820797, now seen corresponding path program 1 times [2022-11-16 11:32:06,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:06,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664956980] [2022-11-16 11:32:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:06,003 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 11:32:06,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:06,004 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:06,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:32:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:06,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:32:06,290 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 11:32:06,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:06,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:06,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664956980] [2022-11-16 11:32:06,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664956980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:06,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:06,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899028224] [2022-11-16 11:32:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:06,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:06,293 INFO L87 Difference]: Start difference. First operand 1284 states and 4546 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) 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 11:32:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:06,629 INFO L93 Difference]: Finished difference Result 1176 states and 4045 transitions. [2022-11-16 11:32:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:32:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) 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 14 [2022-11-16 11:32:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:06,633 INFO L225 Difference]: With dead ends: 1176 [2022-11-16 11:32:06,633 INFO L226 Difference]: Without dead ends: 1176 [2022-11-16 11:32:06,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 11:32:06,633 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:06,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:32:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-11-16 11:32:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-11-16 11:32:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1157 states have (on average 3.4961106309420917) internal successors, (4045), 1175 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 4045 transitions. [2022-11-16 11:32:06,668 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 4045 transitions. Word has length 14 [2022-11-16 11:32:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:06,668 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 4045 transitions. [2022-11-16 11:32:06,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) 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 11:32:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 4045 transitions. [2022-11-16 11:32:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:06,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:06,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:06,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:06,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:06,869 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:06,870 INFO L85 PathProgramCache]: Analyzing trace with hash 646127822, now seen corresponding path program 3 times [2022-11-16 11:32:06,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:06,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466536927] [2022-11-16 11:32:06,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:32:06,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:06,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:06,871 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:06,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:07,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:32:07,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:32:07,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:07,370 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:32:07,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:07,541 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:32:07,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:07,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-16 11:32:07,747 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:32:07,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:32:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:07,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-16 11:32:07,877 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:32:07,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:32:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:32:08,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:32:10,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:10,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466536927] [2022-11-16 11:32:10,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466536927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:10,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:10,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:32:10,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664033137] [2022-11-16 11:32:10,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:32:10,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:32:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:32:10,515 INFO L87 Difference]: Start difference. First operand 1176 states and 4045 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:23,264 INFO L93 Difference]: Finished difference Result 2417 states and 8622 transitions. [2022-11-16 11:32:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:32:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:32:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:23,289 INFO L225 Difference]: With dead ends: 2417 [2022-11-16 11:32:23,289 INFO L226 Difference]: Without dead ends: 2393 [2022-11-16 11:32:23,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:32:23,291 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 289 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:23,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 167 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 933 Invalid, 0 Unknown, 110 Unchecked, 7.9s Time] [2022-11-16 11:32:23,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2022-11-16 11:32:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 1671. [2022-11-16 11:32:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1649 states have (on average 3.5912674348089753) internal successors, (5922), 1670 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5922 transitions. [2022-11-16 11:32:23,329 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5922 transitions. Word has length 15 [2022-11-16 11:32:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:23,329 INFO L495 AbstractCegarLoop]: Abstraction has 1671 states and 5922 transitions. [2022-11-16 11:32:23,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5922 transitions. [2022-11-16 11:32:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:23,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:23,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:23,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:23,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:23,531 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:23,531 INFO L85 PathProgramCache]: Analyzing trace with hash -290430689, now seen corresponding path program 1 times [2022-11-16 11:32:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:23,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928298863] [2022-11-16 11:32:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:23,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:23,533 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:23,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:32:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:24,031 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:32:24,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:24,196 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:32:24,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:24,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:32:24,392 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:32:24,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:32:24,452 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:32:24,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:32:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:24,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:29,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928298863] [2022-11-16 11:32:29,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928298863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:29,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:29,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:32:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179191322] [2022-11-16 11:32:29,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:29,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:32:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:32:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:32:29,641 INFO L87 Difference]: Start difference. First operand 1671 states and 5922 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:30,652 INFO L93 Difference]: Finished difference Result 1847 states and 6373 transitions. [2022-11-16 11:32:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:32:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:30,659 INFO L225 Difference]: With dead ends: 1847 [2022-11-16 11:32:30,659 INFO L226 Difference]: Without dead ends: 1847 [2022-11-16 11:32:30,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:32:30,660 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:30,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 65 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 206 Unchecked, 0.7s Time] [2022-11-16 11:32:30,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-11-16 11:32:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1683. [2022-11-16 11:32:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1661 states have (on average 3.5990367248645394) internal successors, (5978), 1682 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5978 transitions. [2022-11-16 11:32:30,704 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5978 transitions. Word has length 15 [2022-11-16 11:32:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:30,704 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 5978 transitions. [2022-11-16 11:32:30,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5978 transitions. [2022-11-16 11:32:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:30,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:30,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:30,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-16 11:32:30,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:30,905 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -290430439, now seen corresponding path program 1 times [2022-11-16 11:32:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:30,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273146815] [2022-11-16 11:32:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:30,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:30,909 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:30,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:31,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:32:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:31,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:32:31,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:32:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:31,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:32:31,387 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:32:31,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:32:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:31,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:32,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:32:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:32,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:32,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273146815] [2022-11-16 11:32:32,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273146815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:32,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:32,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:32:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414687055] [2022-11-16 11:32:32,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:32:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:32,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:32:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:32:32,228 INFO L87 Difference]: Start difference. First operand 1683 states and 5978 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:36,591 INFO L93 Difference]: Finished difference Result 2199 states and 7584 transitions. [2022-11-16 11:32:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:32:36,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:36,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:36,599 INFO L225 Difference]: With dead ends: 2199 [2022-11-16 11:32:36,599 INFO L226 Difference]: Without dead ends: 2199 [2022-11-16 11:32:36,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:32:36,600 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:36,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 66 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 281 Invalid, 0 Unknown, 100 Unchecked, 1.6s Time] [2022-11-16 11:32:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2022-11-16 11:32:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 1691. [2022-11-16 11:32:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1669 states have (on average 3.5961653684841224) internal successors, (6002), 1690 states have internal predecessors, (6002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 6002 transitions. [2022-11-16 11:32:36,643 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 6002 transitions. Word has length 15 [2022-11-16 11:32:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:36,644 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 6002 transitions. [2022-11-16 11:32:36,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 6002 transitions. [2022-11-16 11:32:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:36,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:36,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:36,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:36,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:36,861 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash -290423125, now seen corresponding path program 1 times [2022-11-16 11:32:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:36,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117000822] [2022-11-16 11:32:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:36,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:36,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:36,863 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:36,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:32:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:37,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:37,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:37,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117000822] [2022-11-16 11:32:37,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117000822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:37,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:37,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:32:37,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995625390] [2022-11-16 11:32:37,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:37,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:32:37,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:37,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:32:37,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:32:37,605 INFO L87 Difference]: Start difference. First operand 1691 states and 6002 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:40,131 INFO L93 Difference]: Finished difference Result 1679 states and 5663 transitions. [2022-11-16 11:32:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:32:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:40,137 INFO L225 Difference]: With dead ends: 1679 [2022-11-16 11:32:40,137 INFO L226 Difference]: Without dead ends: 1655 [2022-11-16 11:32:40,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:32:40,137 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 206 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:40,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 58 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 11:32:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-11-16 11:32:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1605. [2022-11-16 11:32:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1584 states have (on average 3.474747474747475) internal successors, (5504), 1604 states have internal predecessors, (5504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5504 transitions. [2022-11-16 11:32:40,186 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5504 transitions. Word has length 15 [2022-11-16 11:32:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:40,187 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 5504 transitions. [2022-11-16 11:32:40,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:32:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5504 transitions. [2022-11-16 11:32:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:40,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:40,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:40,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:40,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:40,402 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:40,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:40,403 INFO L85 PathProgramCache]: Analyzing trace with hash -290147969, now seen corresponding path program 2 times [2022-11-16 11:32:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118932613] [2022-11-16 11:32:40,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:32:40,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:40,404 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:40,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:40,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:32:40,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:32:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:40,821 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:32:40,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:32:40,990 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:32:40,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:41,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:32:41,124 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:32:41,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:32:41,194 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:32:41,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:32:41,362 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 11:32:41,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:41,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:41,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118932613] [2022-11-16 11:32:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118932613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:41,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:41,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55065048] [2022-11-16 11:32:41,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:41,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:32:41,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:41,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:32:41,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:32:41,364 INFO L87 Difference]: Start difference. First operand 1605 states and 5504 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 11:32:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:41,905 INFO L93 Difference]: Finished difference Result 1797 states and 5880 transitions. [2022-11-16 11:32:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:41,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:32:41,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:41,912 INFO L225 Difference]: With dead ends: 1797 [2022-11-16 11:32:41,912 INFO L226 Difference]: Without dead ends: 1797 [2022-11-16 11:32:41,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:32:41,913 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 81 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:41,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 7 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:32:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-11-16 11:32:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1469. [2022-11-16 11:32:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1449 states have (on average 3.4472049689440993) internal successors, (4995), 1468 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 4995 transitions. [2022-11-16 11:32:41,948 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 4995 transitions. Word has length 15 [2022-11-16 11:32:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:41,949 INFO L495 AbstractCegarLoop]: Abstraction has 1469 states and 4995 transitions. [2022-11-16 11:32:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 11:32:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 4995 transitions. [2022-11-16 11:32:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:41,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:41,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:41,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:42,151 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:42,151 INFO L85 PathProgramCache]: Analyzing trace with hash -290147719, now seen corresponding path program 2 times [2022-11-16 11:32:42,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:42,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213792926] [2022-11-16 11:32:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:32:42,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:42,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:42,153 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:42,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:32:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:42,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:32:42,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:42,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:32:42,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:32:42,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:42,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:32:42,537 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:32:42,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:32:42,695 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 11:32:42,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:42,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:42,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213792926] [2022-11-16 11:32:42,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213792926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:42,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:42,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:32:42,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162043298] [2022-11-16 11:32:42,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:42,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:32:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:32:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:32:42,697 INFO L87 Difference]: Start difference. First operand 1469 states and 4995 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 11:32:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:43,228 INFO L93 Difference]: Finished difference Result 1549 states and 5075 transitions. [2022-11-16 11:32:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:43,230 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 15 [2022-11-16 11:32:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:43,235 INFO L225 Difference]: With dead ends: 1549 [2022-11-16 11:32:43,235 INFO L226 Difference]: Without dead ends: 1441 [2022-11-16 11:32:43,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:32:43,236 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:43,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 7 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:32:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-11-16 11:32:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1244. [2022-11-16 11:32:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1225 states have (on average 3.507755102040816) internal successors, (4297), 1243 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4297 transitions. [2022-11-16 11:32:43,273 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4297 transitions. Word has length 15 [2022-11-16 11:32:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:43,274 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 4297 transitions. [2022-11-16 11:32:43,274 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 11:32:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4297 transitions. [2022-11-16 11:32:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:32:43,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:43,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:43,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:32:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:43,489 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -980057584, now seen corresponding path program 2 times [2022-11-16 11:32:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:43,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475117548] [2022-11-16 11:32:43,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:32:43,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:43,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:43,491 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:43,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:43,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:32:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:32:43,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:43,861 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:32:43,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:32:43,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:43,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:32:43,959 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:32:43,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:32:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:32:44,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:32:45,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:45,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475117548] [2022-11-16 11:32:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475117548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:45,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:45,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 11:32:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323194053] [2022-11-16 11:32:45,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:32:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:32:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:32:45,199 INFO L87 Difference]: Start difference. First operand 1244 states and 4297 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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 11:32:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:47,072 INFO L93 Difference]: Finished difference Result 1616 states and 5692 transitions. [2022-11-16 11:32:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:32:47,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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 16 [2022-11-16 11:32:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:47,079 INFO L225 Difference]: With dead ends: 1616 [2022-11-16 11:32:47,079 INFO L226 Difference]: Without dead ends: 1616 [2022-11-16 11:32:47,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:32:47,080 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 153 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:47,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 45 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 82 Unchecked, 1.9s Time] [2022-11-16 11:32:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-11-16 11:32:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1418. [2022-11-16 11:32:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1399 states have (on average 3.68048606147248) internal successors, (5149), 1417 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 5149 transitions. [2022-11-16 11:32:47,138 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 5149 transitions. Word has length 16 [2022-11-16 11:32:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:47,138 INFO L495 AbstractCegarLoop]: Abstraction has 1418 states and 5149 transitions. [2022-11-16 11:32:47,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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 11:32:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 5149 transitions. [2022-11-16 11:32:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:32:47,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:47,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:47,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:47,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:47,354 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:32:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash -317001667, now seen corresponding path program 3 times [2022-11-16 11:32:47,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:47,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319380061] [2022-11-16 11:32:47,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:32:47,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:47,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:47,357 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:32:47,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:47,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:32:47,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:47,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:32:47,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:47,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:32:47,719 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:32:47,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:47,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:32:47,900 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:32:47,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:32:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:32:48,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:51,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:32:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:32:51,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:51,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319380061] [2022-11-16 11:32:51,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319380061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:51,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:51,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:32:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583761788] [2022-11-16 11:32:51,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:51,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:32:51,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:32:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:32:51,838 INFO L87 Difference]: Start difference. First operand 1418 states and 5149 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 11:33:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:02,596 INFO L93 Difference]: Finished difference Result 2342 states and 8982 transitions. [2022-11-16 11:33:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:33:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 17 [2022-11-16 11:33:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:02,606 INFO L225 Difference]: With dead ends: 2342 [2022-11-16 11:33:02,606 INFO L226 Difference]: Without dead ends: 2342 [2022-11-16 11:33:02,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:33:02,607 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 630 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:02,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 161 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1073 Invalid, 0 Unknown, 12 Unchecked, 7.1s Time] [2022-11-16 11:33:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-11-16 11:33:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2114. [2022-11-16 11:33:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2095 states have (on average 4.001431980906921) internal successors, (8383), 2113 states have internal predecessors, (8383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 8383 transitions. [2022-11-16 11:33:02,670 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 8383 transitions. Word has length 17 [2022-11-16 11:33:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:02,670 INFO L495 AbstractCegarLoop]: Abstraction has 2114 states and 8383 transitions. [2022-11-16 11:33:02,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 11:33:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 8383 transitions. [2022-11-16 11:33:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:33:02,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:02,672 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1] [2022-11-16 11:33:02,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:02,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:02,885 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:33:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash -750632946, now seen corresponding path program 1 times [2022-11-16 11:33:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:02,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615498658] [2022-11-16 11:33:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:02,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:02,887 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:33:02,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:33:03,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:03,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:33:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:33:03,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:07,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615498658] [2022-11-16 11:33:07,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615498658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:07,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:07,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 28 [2022-11-16 11:33:07,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293820487] [2022-11-16 11:33:07,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:07,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:33:07,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:33:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:33:07,493 INFO L87 Difference]: Start difference. First operand 2114 states and 8383 transitions. Second operand has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:28,146 INFO L93 Difference]: Finished difference Result 5728 states and 23597 transitions. [2022-11-16 11:33:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:33:28,148 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 11:33:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:28,184 INFO L225 Difference]: With dead ends: 5728 [2022-11-16 11:33:28,184 INFO L226 Difference]: Without dead ends: 5728 [2022-11-16 11:33:28,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:33:28,185 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 316 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:28,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 144 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1295 Invalid, 0 Unknown, 110 Unchecked, 16.8s Time] [2022-11-16 11:33:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2022-11-16 11:33:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 2120. [2022-11-16 11:33:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2101 states have (on average 3.9933365064255115) internal successors, (8390), 2119 states have internal predecessors, (8390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 8390 transitions. [2022-11-16 11:33:28,336 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 8390 transitions. Word has length 17 [2022-11-16 11:33:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:28,336 INFO L495 AbstractCegarLoop]: Abstraction has 2120 states and 8390 transitions. [2022-11-16 11:33:28,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:28,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 8390 transitions. [2022-11-16 11:33:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:33:28,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:28,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:28,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:28,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:28,539 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:33:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash -813611155, now seen corresponding path program 2 times [2022-11-16 11:33:28,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:28,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521347504] [2022-11-16 11:33:28,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:33:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:28,541 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:33:28,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:33:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:33:28,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:33:28,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:29,058 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:33:29,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:33:29,201 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:33:29,202 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 15 treesize of output 50 [2022-11-16 11:33:29,332 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:33:29,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:33:29,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:33:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:29,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:33:29,427 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:33:29,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:33:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:33:29,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:33:31,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521347504] [2022-11-16 11:33:31,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521347504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:31,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:31,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:33:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898895702] [2022-11-16 11:33:31,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:31,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:33:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:33:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:33:31,032 INFO L87 Difference]: Start difference. First operand 2120 states and 8390 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:33:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:33,174 INFO L93 Difference]: Finished difference Result 4368 states and 18209 transitions. [2022-11-16 11:33:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:33:33,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 18 [2022-11-16 11:33:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:33,190 INFO L225 Difference]: With dead ends: 4368 [2022-11-16 11:33:33,190 INFO L226 Difference]: Without dead ends: 4368 [2022-11-16 11:33:33,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:33:33,191 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 184 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:33,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 28 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 221 Invalid, 0 Unknown, 65 Unchecked, 1.6s Time] [2022-11-16 11:33:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2022-11-16 11:33:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 2786. [2022-11-16 11:33:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2767 states have (on average 4.764727141308276) internal successors, (13184), 2785 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 13184 transitions. [2022-11-16 11:33:33,259 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 13184 transitions. Word has length 18 [2022-11-16 11:33:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:33,259 INFO L495 AbstractCegarLoop]: Abstraction has 2786 states and 13184 transitions. [2022-11-16 11:33:33,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 11:33:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 13184 transitions. [2022-11-16 11:33:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:33:33,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:33,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:33,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:33,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:33,474 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:33:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:33,475 INFO L85 PathProgramCache]: Analyzing trace with hash -813610730, now seen corresponding path program 1 times [2022-11-16 11:33:33,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:33,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163293636] [2022-11-16 11:33:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:33,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:33,477 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:33:33,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:33:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:33:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:34,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-16 11:33:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:33:34,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:34,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163293636] [2022-11-16 11:33:34,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163293636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:34,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:34,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 11:33:34,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736944412] [2022-11-16 11:33:34,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:34,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:33:34,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:33:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:33:34,548 INFO L87 Difference]: Start difference. First operand 2786 states and 13184 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:38,581 INFO L93 Difference]: Finished difference Result 9722 states and 43689 transitions. [2022-11-16 11:33:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:33:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:33:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:38,615 INFO L225 Difference]: With dead ends: 9722 [2022-11-16 11:33:38,615 INFO L226 Difference]: Without dead ends: 9722 [2022-11-16 11:33:38,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:33:38,616 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 740 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:38,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 86 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 11:33:38,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9722 states. [2022-11-16 11:33:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9722 to 2786. [2022-11-16 11:33:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2767 states have (on average 4.684495843874232) internal successors, (12962), 2785 states have internal predecessors, (12962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 12962 transitions. [2022-11-16 11:33:38,751 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 12962 transitions. Word has length 18 [2022-11-16 11:33:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:38,751 INFO L495 AbstractCegarLoop]: Abstraction has 2786 states and 12962 transitions. [2022-11-16 11:33:38,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 12962 transitions. [2022-11-16 11:33:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:33:38,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:38,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:38,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:38,966 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:33:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash -813610905, now seen corresponding path program 1 times [2022-11-16 11:33:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:38,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993185728] [2022-11-16 11:33:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:38,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:38,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:38,967 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:33:38,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:39,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:33:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:39,596 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:33:39,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:33:39,729 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:33:39,752 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:33:39,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:33:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:33:39,978 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 11:33:39,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-16 11:33:39,997 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:33:39,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:33:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:33:40,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:42,954 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 10 treesize of output 8 [2022-11-16 11:33:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:33:43,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:43,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993185728] [2022-11-16 11:33:43,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993185728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:43,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:43,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:33:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220784797] [2022-11-16 11:33:43,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:43,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:33:43,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:43,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:33:43,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:33:43,383 INFO L87 Difference]: Start difference. First operand 2786 states and 12962 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:45,137 INFO L93 Difference]: Finished difference Result 3324 states and 15098 transitions. [2022-11-16 11:33:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:33:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:33:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:45,148 INFO L225 Difference]: With dead ends: 3324 [2022-11-16 11:33:45,148 INFO L226 Difference]: Without dead ends: 3324 [2022-11-16 11:33:45,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:33:45,149 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:45,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 133 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 283 Invalid, 0 Unknown, 161 Unchecked, 1.4s Time] [2022-11-16 11:33:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2022-11-16 11:33:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 3064. [2022-11-16 11:33:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3045 states have (on average 4.701806239737274) internal successors, (14317), 3063 states have internal predecessors, (14317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 14317 transitions. [2022-11-16 11:33:45,213 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 14317 transitions. Word has length 18 [2022-11-16 11:33:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:45,213 INFO L495 AbstractCegarLoop]: Abstraction has 3064 states and 14317 transitions. [2022-11-16 11:33:45,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 14317 transitions. [2022-11-16 11:33:45,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:33:45,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:45,214 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 1, 1, 1] [2022-11-16 11:33:45,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:45,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:45,414 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:33:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:45,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1310761072, now seen corresponding path program 2 times [2022-11-16 11:33:45,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:45,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559274261] [2022-11-16 11:33:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:33:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:45,416 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:33:45,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:45,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:33:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:33:45,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:33:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:45,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:33:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:33:46,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:50,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:50,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559274261] [2022-11-16 11:33:50,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559274261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:50,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:50,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 31 [2022-11-16 11:33:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075337300] [2022-11-16 11:33:50,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:50,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:33:50,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:33:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:33:50,698 INFO L87 Difference]: Start difference. First operand 3064 states and 14317 transitions. Second operand has 32 states, 32 states have (on average 1.0625) internal successors, (34), 31 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 11:34:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:01,330 INFO L93 Difference]: Finished difference Result 11191 states and 54683 transitions. [2022-11-16 11:34:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:34:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.0625) internal successors, (34), 31 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 19 [2022-11-16 11:34:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:01,371 INFO L225 Difference]: With dead ends: 11191 [2022-11-16 11:34:01,371 INFO L226 Difference]: Without dead ends: 11191 [2022-11-16 11:34:01,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:34:01,372 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 416 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:01,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 240 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1271 Invalid, 0 Unknown, 183 Unchecked, 8.7s Time] [2022-11-16 11:34:01,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11191 states. [2022-11-16 11:34:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11191 to 3083. [2022-11-16 11:34:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3064 states have (on average 4.683746736292428) internal successors, (14351), 3082 states have internal predecessors, (14351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 14351 transitions. [2022-11-16 11:34:01,536 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 14351 transitions. Word has length 19 [2022-11-16 11:34:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:01,536 INFO L495 AbstractCegarLoop]: Abstraction has 3083 states and 14351 transitions. [2022-11-16 11:34:01,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.0625) internal successors, (34), 31 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 11:34:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 14351 transitions. [2022-11-16 11:34:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:34:01,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:01,538 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:01,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:01,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:01,747 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash 363578446, now seen corresponding path program 4 times [2022-11-16 11:34:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:01,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71022904] [2022-11-16 11:34:01,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:34:01,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:01,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:01,749 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:01,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:02,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:34:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:34:02,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:02,322 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:34:02,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:02,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:34:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:34:02,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:34:03,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71022904] [2022-11-16 11:34:03,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71022904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:03,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:03,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 11:34:03,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86906842] [2022-11-16 11:34:03,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:03,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:34:03,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:34:03,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:34:03,101 INFO L87 Difference]: Start difference. First operand 3083 states and 14351 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:08,826 INFO L93 Difference]: Finished difference Result 4376 states and 19708 transitions. [2022-11-16 11:34:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:34:08,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:34:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:08,842 INFO L225 Difference]: With dead ends: 4376 [2022-11-16 11:34:08,842 INFO L226 Difference]: Without dead ends: 4376 [2022-11-16 11:34:08,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:34:08,842 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 423 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:08,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 158 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-16 11:34:08,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2022-11-16 11:34:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3890. [2022-11-16 11:34:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3871 states have (on average 4.626453112890726) internal successors, (17909), 3889 states have internal predecessors, (17909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 17909 transitions. [2022-11-16 11:34:08,922 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 17909 transitions. Word has length 19 [2022-11-16 11:34:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:08,922 INFO L495 AbstractCegarLoop]: Abstraction has 3890 states and 17909 transitions. [2022-11-16 11:34:08,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 17909 transitions. [2022-11-16 11:34:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:34:08,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:08,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:08,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:09,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:09,139 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash 547638357, now seen corresponding path program 1 times [2022-11-16 11:34:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:09,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123144037] [2022-11-16 11:34:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:09,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:09,141 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:09,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:34:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:09,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:34:09,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:09,940 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:34:09,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:34:09,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:34:10,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:10,108 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 11:34:10,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-11-16 11:34:10,127 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:34:10,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:34:10,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:34:10,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:11,123 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 10 treesize of output 8 [2022-11-16 11:34:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:34:11,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123144037] [2022-11-16 11:34:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123144037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:11,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:11,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:34:11,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759483746] [2022-11-16 11:34:11,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:11,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:34:11,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:34:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:34:11,561 INFO L87 Difference]: Start difference. First operand 3890 states and 17909 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 11:34:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:13,157 INFO L93 Difference]: Finished difference Result 4815 states and 21688 transitions. [2022-11-16 11:34:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:34:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 19 [2022-11-16 11:34:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:13,174 INFO L225 Difference]: With dead ends: 4815 [2022-11-16 11:34:13,174 INFO L226 Difference]: Without dead ends: 4815 [2022-11-16 11:34:13,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:34:13,174 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:13,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 177 Unchecked, 1.3s Time] [2022-11-16 11:34:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4815 states. [2022-11-16 11:34:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4815 to 4263. [2022-11-16 11:34:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4244 states have (on average 4.57516493873704) internal successors, (19417), 4262 states have internal predecessors, (19417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 19417 transitions. [2022-11-16 11:34:13,306 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 19417 transitions. Word has length 19 [2022-11-16 11:34:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:13,306 INFO L495 AbstractCegarLoop]: Abstraction has 4263 states and 19417 transitions. [2022-11-16 11:34:13,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 11:34:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 19417 transitions. [2022-11-16 11:34:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:34:13,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:13,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:13,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:13,508 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 547865277, now seen corresponding path program 2 times [2022-11-16 11:34:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:13,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328847423] [2022-11-16 11:34:13,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:34:13,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:13,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:13,510 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:13,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:13,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:34:13,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:34:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:13,969 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:34:13,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:14,120 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:34:14,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:14,214 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:34:14,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:34:14,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:34:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:14,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:14,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-16 11:34:14,384 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 11:34:14,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:34:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:34:14,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:34:14,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:14,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328847423] [2022-11-16 11:34:14,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328847423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:34:14,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:34:14,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:34:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147949902] [2022-11-16 11:34:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:34:14,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:34:14,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:34:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:34:14,962 INFO L87 Difference]: Start difference. First operand 4263 states and 19417 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 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 11:34:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:15,222 INFO L93 Difference]: Finished difference Result 4249 states and 19320 transitions. [2022-11-16 11:34:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:34:15,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 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 19 [2022-11-16 11:34:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:15,236 INFO L225 Difference]: With dead ends: 4249 [2022-11-16 11:34:15,237 INFO L226 Difference]: Without dead ends: 4249 [2022-11-16 11:34:15,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:34:15,237 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:15,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-16 11:34:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2022-11-16 11:34:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 4150. [2022-11-16 11:34:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4150 states, 4131 states have (on average 4.602759622367466) internal successors, (19014), 4149 states have internal predecessors, (19014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4150 states to 4150 states and 19014 transitions. [2022-11-16 11:34:15,317 INFO L78 Accepts]: Start accepts. Automaton has 4150 states and 19014 transitions. Word has length 19 [2022-11-16 11:34:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:15,317 INFO L495 AbstractCegarLoop]: Abstraction has 4150 states and 19014 transitions. [2022-11-16 11:34:15,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 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 11:34:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4150 states and 19014 transitions. [2022-11-16 11:34:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:34:15,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:15,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:15,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:15,519 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash 547873016, now seen corresponding path program 2 times [2022-11-16 11:34:15,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:15,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112757354] [2022-11-16 11:34:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:34:15,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:15,521 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:15,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:15,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:34:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:15,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:34:15,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:15,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:34:15,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:34:15,926 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:34:15,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:34:15,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:34:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:34:16,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:34:16,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112757354] [2022-11-16 11:34:16,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112757354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:34:16,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:34:16,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:34:16,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085778025] [2022-11-16 11:34:16,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:34:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:34:16,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:34:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:34:16,244 INFO L87 Difference]: Start difference. First operand 4150 states and 19014 transitions. Second operand has 5 states, 4 states have (on average 3.75) 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 11:34:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:16,467 INFO L93 Difference]: Finished difference Result 4143 states and 18970 transitions. [2022-11-16 11:34:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:34:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) 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 19 [2022-11-16 11:34:16,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:16,481 INFO L225 Difference]: With dead ends: 4143 [2022-11-16 11:34:16,481 INFO L226 Difference]: Without dead ends: 4143 [2022-11-16 11:34:16,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:34:16,482 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:16,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-16 11:34:16,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-11-16 11:34:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4142. [2022-11-16 11:34:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 4123 states have (on average 4.600048508367694) internal successors, (18966), 4141 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 18966 transitions. [2022-11-16 11:34:16,565 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 18966 transitions. Word has length 19 [2022-11-16 11:34:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:16,565 INFO L495 AbstractCegarLoop]: Abstraction has 4142 states and 18966 transitions. [2022-11-16 11:34:16,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) 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 11:34:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 18966 transitions. [2022-11-16 11:34:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:34:16,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:16,566 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:16,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:16,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:16,767 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:16,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1507237877, now seen corresponding path program 1 times [2022-11-16 11:34:16,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:16,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876600116] [2022-11-16 11:34:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:16,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:16,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:16,769 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:16,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:17,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:34:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:17,515 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:34:17,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:17,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:34:17,666 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:34:17,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:34:17,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:17,823 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 11:34:17,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-11-16 11:34:17,842 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:34:17,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:34:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:34:18,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:18,846 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 10 treesize of output 8 [2022-11-16 11:34:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:34:19,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876600116] [2022-11-16 11:34:19,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876600116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:19,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:19,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:34:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70939477] [2022-11-16 11:34:19,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:34:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:34:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:34:19,347 INFO L87 Difference]: Start difference. First operand 4142 states and 18966 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:21,206 INFO L93 Difference]: Finished difference Result 4567 states and 20323 transitions. [2022-11-16 11:34:21,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:34:21,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:34:21,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:21,222 INFO L225 Difference]: With dead ends: 4567 [2022-11-16 11:34:21,222 INFO L226 Difference]: Without dead ends: 4567 [2022-11-16 11:34:21,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:34:21,223 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:21,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 105 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 439 Unchecked, 1.3s Time] [2022-11-16 11:34:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2022-11-16 11:34:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4241. [2022-11-16 11:34:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4241 states, 4222 states have (on average 4.571530080530554) internal successors, (19301), 4240 states have internal predecessors, (19301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4241 states to 4241 states and 19301 transitions. [2022-11-16 11:34:21,349 INFO L78 Accepts]: Start accepts. Automaton has 4241 states and 19301 transitions. Word has length 20 [2022-11-16 11:34:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:21,349 INFO L495 AbstractCegarLoop]: Abstraction has 4241 states and 19301 transitions. [2022-11-16 11:34:21,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4241 states and 19301 transitions. [2022-11-16 11:34:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:34:21,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:21,351 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:21,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:21,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:21,554 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash -203072822, now seen corresponding path program 1 times [2022-11-16 11:34:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:21,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210900339] [2022-11-16 11:34:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:21,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:21,557 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:21,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:21,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:34:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:21,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:34:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:34:22,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:34:23,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:23,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210900339] [2022-11-16 11:34:23,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210900339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:23,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:23,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:34:23,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616816078] [2022-11-16 11:34:23,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:23,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:34:23,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:34:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:34:23,429 INFO L87 Difference]: Start difference. First operand 4241 states and 19301 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 11:34:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:27,686 INFO L93 Difference]: Finished difference Result 8419 states and 34141 transitions. [2022-11-16 11:34:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:34:27,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 20 [2022-11-16 11:34:27,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:27,714 INFO L225 Difference]: With dead ends: 8419 [2022-11-16 11:34:27,714 INFO L226 Difference]: Without dead ends: 8419 [2022-11-16 11:34:27,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:34:27,714 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 434 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:27,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 31 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:34:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8419 states. [2022-11-16 11:34:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 4845. [2022-11-16 11:34:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4826 states have (on average 4.761914629092416) internal successors, (22981), 4844 states have internal predecessors, (22981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 22981 transitions. [2022-11-16 11:34:27,840 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 22981 transitions. Word has length 20 [2022-11-16 11:34:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:27,841 INFO L495 AbstractCegarLoop]: Abstraction has 4845 states and 22981 transitions. [2022-11-16 11:34:27,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 11:34:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 22981 transitions. [2022-11-16 11:34:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:34:27,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:27,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:27,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:34:28,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:28,043 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:28,044 INFO L85 PathProgramCache]: Analyzing trace with hash -196369216, now seen corresponding path program 1 times [2022-11-16 11:34:28,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:28,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437976431] [2022-11-16 11:34:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:28,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:28,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:28,045 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:28,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:28,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:34:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:28,763 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:34:28,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:28,894 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:34:28,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:34:28,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:34:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:34:29,072 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 11:34:29,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-16 11:34:29,091 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:34:29,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:34:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:34:29,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:32,142 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 10 treesize of output 8 [2022-11-16 11:34:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:34:32,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:32,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437976431] [2022-11-16 11:34:32,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437976431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:32,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:32,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:34:32,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825055753] [2022-11-16 11:34:32,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:32,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:34:32,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:34:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:34:32,568 INFO L87 Difference]: Start difference. First operand 4845 states and 22981 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:33,424 INFO L93 Difference]: Finished difference Result 4885 states and 23217 transitions. [2022-11-16 11:34:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:34:33,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:34:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:33,442 INFO L225 Difference]: With dead ends: 4885 [2022-11-16 11:34:33,443 INFO L226 Difference]: Without dead ends: 4885 [2022-11-16 11:34:33,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:34:33,443 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:33,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 91 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 210 Unchecked, 0.5s Time] [2022-11-16 11:34:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2022-11-16 11:34:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 4869. [2022-11-16 11:34:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4869 states, 4850 states have (on average 4.768041237113402) internal successors, (23125), 4868 states have internal predecessors, (23125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 23125 transitions. [2022-11-16 11:34:33,589 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 23125 transitions. Word has length 20 [2022-11-16 11:34:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:33,589 INFO L495 AbstractCegarLoop]: Abstraction has 4869 states and 23125 transitions. [2022-11-16 11:34:33,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 23125 transitions. [2022-11-16 11:34:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:34:33,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:33,591 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1] [2022-11-16 11:34:33,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:33,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:33,792 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:34:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:33,792 INFO L85 PathProgramCache]: Analyzing trace with hash 380435790, now seen corresponding path program 3 times [2022-11-16 11:34:33,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:33,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351738680] [2022-11-16 11:34:33,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:34:33,793 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 11:34:33,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:33,793 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:34:33,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:34,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 11:34:34,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 11:34:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:34,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:34:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:35,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:42,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351738680] [2022-11-16 11:34:42,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351738680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:42,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:42,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 40 [2022-11-16 11:34:42,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764354611] [2022-11-16 11:34:42,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:42,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:34:42,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:42,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:34:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:34:42,186 INFO L87 Difference]: Start difference. First operand 4869 states and 23125 transitions. Second operand has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 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 11:37:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:06,284 INFO L93 Difference]: Finished difference Result 81667 states and 411849 transitions. [2022-11-16 11:37:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-16 11:37:06,287 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 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 11:37:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:07,137 INFO L225 Difference]: With dead ends: 81667 [2022-11-16 11:37:07,137 INFO L226 Difference]: Without dead ends: 81667 [2022-11-16 11:37:07,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4033 ImplicationChecksByTransitivity, 84.8s TimeCoverageRelationStatistics Valid=2399, Invalid=14631, Unknown=0, NotChecked=0, Total=17030 [2022-11-16 11:37:07,138 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3583 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 7955 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3583 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 8842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 7955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 64.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:07,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3583 Valid, 936 Invalid, 8842 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [656 Valid, 7955 Invalid, 0 Unknown, 231 Unchecked, 64.8s Time] [2022-11-16 11:37:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81667 states. [2022-11-16 11:37:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81667 to 4866. [2022-11-16 11:37:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4866 states, 4847 states have (on average 4.768929234578089) internal successors, (23115), 4865 states have internal predecessors, (23115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4866 states to 4866 states and 23115 transitions. [2022-11-16 11:37:08,310 INFO L78 Accepts]: Start accepts. Automaton has 4866 states and 23115 transitions. Word has length 21 [2022-11-16 11:37:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:08,310 INFO L495 AbstractCegarLoop]: Abstraction has 4866 states and 23115 transitions. [2022-11-16 11:37:08,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 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 11:37:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4866 states and 23115 transitions. [2022-11-16 11:37:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:37:08,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:08,312 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 1, 1, 1] [2022-11-16 11:37:08,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:08,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:08,513 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:37:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:08,513 INFO L85 PathProgramCache]: Analyzing trace with hash -696084082, now seen corresponding path program 4 times [2022-11-16 11:37:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009319818] [2022-11-16 11:37:08,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:37:08,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:08,516 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:37:08,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:37:08,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:37:08,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:37:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:09,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:37:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 56 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 11:37:09,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:14,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009319818] [2022-11-16 11:37:14,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009319818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:14,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:14,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 34 [2022-11-16 11:37:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666732424] [2022-11-16 11:37:14,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:14,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:37:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:14,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:37:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:37:14,967 INFO L87 Difference]: Start difference. First operand 4866 states and 23115 transitions. Second operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:13,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:15,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:16,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:18,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:20,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:28,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:36,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:42,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:44,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:45,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:47,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:54,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:38:59,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:39:09,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:39:15,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:39:22,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:20,076 INFO L93 Difference]: Finished difference Result 70877 states and 357731 transitions. [2022-11-16 11:40:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-16 11:40:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:40:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:20,730 INFO L225 Difference]: With dead ends: 70877 [2022-11-16 11:40:20,730 INFO L226 Difference]: Without dead ends: 70877 [2022-11-16 11:40:20,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=838, Invalid=5968, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 11:40:20,731 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3065 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 8411 mSolverCounterSat, 403 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 9412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 8411 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 150.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:20,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3065 Valid, 999 Invalid, 9412 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [403 Valid, 8411 Invalid, 5 Unknown, 593 Unchecked, 150.7s Time] [2022-11-16 11:40:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70877 states. [2022-11-16 11:40:21,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70877 to 4867. [2022-11-16 11:40:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4867 states, 4848 states have (on average 4.767120462046204) internal successors, (23111), 4866 states have internal predecessors, (23111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4867 states to 4867 states and 23111 transitions. [2022-11-16 11:40:21,892 INFO L78 Accepts]: Start accepts. Automaton has 4867 states and 23111 transitions. Word has length 21 [2022-11-16 11:40:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:21,893 INFO L495 AbstractCegarLoop]: Abstraction has 4867 states and 23111 transitions. [2022-11-16 11:40:21,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4867 states and 23111 transitions. [2022-11-16 11:40:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:40:21,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:21,895 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:21,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:22,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:22,095 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:40:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1436096000, now seen corresponding path program 2 times [2022-11-16 11:40:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:22,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277482350] [2022-11-16 11:40:22,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:40:22,096 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 11:40:22,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:22,097 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:40:22,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:22,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:40:22,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:40:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:22,573 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:40:22,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:40:22,640 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:40:22,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:22,657 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:40:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:40:22,756 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 11:40:22,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-16 11:40:22,774 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:40:22,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:40:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:40:23,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:23,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:23,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277482350] [2022-11-16 11:40:23,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277482350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:23,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:23,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:40:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476537789] [2022-11-16 11:40:23,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:23,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:40:23,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:40:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:23,114 INFO L87 Difference]: Start difference. First operand 4867 states and 23111 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 11:40:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:23,449 INFO L93 Difference]: Finished difference Result 4852 states and 22959 transitions. [2022-11-16 11:40:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:40:23,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 21 [2022-11-16 11:40:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:23,466 INFO L225 Difference]: With dead ends: 4852 [2022-11-16 11:40:23,466 INFO L226 Difference]: Without dead ends: 4852 [2022-11-16 11:40:23,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:40:23,467 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:23,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-11-16 11:40:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2022-11-16 11:40:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4847. [2022-11-16 11:40:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4847 states, 4828 states have (on average 4.750414250207125) internal successors, (22935), 4846 states have internal predecessors, (22935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:23,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4847 states to 4847 states and 22935 transitions. [2022-11-16 11:40:23,557 INFO L78 Accepts]: Start accepts. Automaton has 4847 states and 22935 transitions. Word has length 21 [2022-11-16 11:40:23,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:23,557 INFO L495 AbstractCegarLoop]: Abstraction has 4847 states and 22935 transitions. [2022-11-16 11:40:23,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 11:40:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4847 states and 22935 transitions. [2022-11-16 11:40:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:40:23,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:23,559 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:23,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:23,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:23,762 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:40:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1069469689, now seen corresponding path program 2 times [2022-11-16 11:40:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:23,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161753043] [2022-11-16 11:40:23,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:40:23,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:23,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:23,764 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:40:23,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:24,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:40:24,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:40:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:24,231 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:40:24,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:40:24,378 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:40:24,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:40:24,472 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:40:24,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:24,493 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:40:24,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:40:24,602 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-16 11:40:24,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-16 11:40:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:40:24,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:24,981 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:24,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161753043] [2022-11-16 11:40:24,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161753043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:24,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:24,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:40:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799512489] [2022-11-16 11:40:24,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:24,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:40:24,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:40:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:24,982 INFO L87 Difference]: Start difference. First operand 4847 states and 22935 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 11:40:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:25,267 INFO L93 Difference]: Finished difference Result 4824 states and 22699 transitions. [2022-11-16 11:40:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:40:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 21 [2022-11-16 11:40:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:25,285 INFO L225 Difference]: With dead ends: 4824 [2022-11-16 11:40:25,285 INFO L226 Difference]: Without dead ends: 4824 [2022-11-16 11:40:25,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:40:25,285 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:25,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 11:40:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2022-11-16 11:40:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4787. [2022-11-16 11:40:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 4768 states have (on average 4.714555369127517) internal successors, (22479), 4786 states have internal predecessors, (22479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 22479 transitions. [2022-11-16 11:40:25,476 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 22479 transitions. Word has length 21 [2022-11-16 11:40:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:25,476 INFO L495 AbstractCegarLoop]: Abstraction has 4787 states and 22479 transitions. [2022-11-16 11:40:25,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 11:40:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 22479 transitions. [2022-11-16 11:40:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:40:25,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:25,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:25,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:25,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:25,679 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:40:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1613706031, now seen corresponding path program 1 times [2022-11-16 11:40:25,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:25,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830171814] [2022-11-16 11:40:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:25,681 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:40:25,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:40:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:26,398 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:40:26,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:40:26,529 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:40:26,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:40:26,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:40:26,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:40:26,686 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 11:40:26,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-16 11:40:26,705 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:40:26,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:40:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:40:27,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:27,811 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 10 treesize of output 8 [2022-11-16 11:40:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:40:28,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:28,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830171814] [2022-11-16 11:40:28,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830171814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:28,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:28,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:40:28,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887838458] [2022-11-16 11:40:28,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:28,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:40:28,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:28,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:40:28,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:40:28,253 INFO L87 Difference]: Start difference. First operand 4787 states and 22479 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 11:40:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:30,589 INFO L93 Difference]: Finished difference Result 9152 states and 44877 transitions. [2022-11-16 11:40:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:40:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:40:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:30,621 INFO L225 Difference]: With dead ends: 9152 [2022-11-16 11:40:30,621 INFO L226 Difference]: Without dead ends: 9152 [2022-11-16 11:40:30,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:40:30,622 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:30,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 106 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 231 Invalid, 0 Unknown, 679 Unchecked, 1.7s Time] [2022-11-16 11:40:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2022-11-16 11:40:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 5430. [2022-11-16 11:40:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5430 states, 5411 states have (on average 4.744594344853077) internal successors, (25673), 5429 states have internal predecessors, (25673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 25673 transitions. [2022-11-16 11:40:30,761 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 25673 transitions. Word has length 21 [2022-11-16 11:40:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:30,761 INFO L495 AbstractCegarLoop]: Abstraction has 5430 states and 25673 transitions. [2022-11-16 11:40:30,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 11:40:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 25673 transitions. [2022-11-16 11:40:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:40:30,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:30,763 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:30,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:40:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:30,963 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:40:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1774949617, now seen corresponding path program 3 times [2022-11-16 11:40:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754736485] [2022-11-16 11:40:30,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:40:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:30,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:30,966 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:40:30,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:31,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:40:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:40:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:31,971 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:40:31,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:40:32,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:40:32,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:40:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:40:32,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:40:33,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:33,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754736485] [2022-11-16 11:40:33,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754736485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:33,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-16 11:40:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104682660] [2022-11-16 11:40:33,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:33,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:40:33,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:40:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:40:33,449 INFO L87 Difference]: Start difference. First operand 5430 states and 25673 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:37,348 INFO L93 Difference]: Finished difference Result 6151 states and 28080 transitions. [2022-11-16 11:40:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:40:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:40:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:37,378 INFO L225 Difference]: With dead ends: 6151 [2022-11-16 11:40:37,378 INFO L226 Difference]: Without dead ends: 6151 [2022-11-16 11:40:37,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:40:37,378 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 348 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:37,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 205 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 670 Invalid, 0 Unknown, 588 Unchecked, 2.8s Time] [2022-11-16 11:40:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-11-16 11:40:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5751. [2022-11-16 11:40:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5751 states, 5732 states have (on average 4.729937194696441) internal successors, (27112), 5750 states have internal predecessors, (27112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5751 states to 5751 states and 27112 transitions. [2022-11-16 11:40:37,559 INFO L78 Accepts]: Start accepts. Automaton has 5751 states and 27112 transitions. Word has length 21 [2022-11-16 11:40:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:37,560 INFO L495 AbstractCegarLoop]: Abstraction has 5751 states and 27112 transitions. [2022-11-16 11:40:37,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5751 states and 27112 transitions. [2022-11-16 11:40:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:40:37,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:37,563 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:37,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:37,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:37,763 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:40:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash 539931901, now seen corresponding path program 4 times [2022-11-16 11:40:37,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:37,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815287742] [2022-11-16 11:40:37,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:40:37,765 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 11:40:37,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:37,766 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:40:37,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:38,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:40:38,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:38,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:40:38,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:38,519 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:40:38,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:40:38,622 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 13 treesize of output 9 [2022-11-16 11:40:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:40:38,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:40:39,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815287742] [2022-11-16 11:40:39,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815287742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:39,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:39,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 11:40:39,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82151308] [2022-11-16 11:40:39,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:39,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:40:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:40:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:40:39,370 INFO L87 Difference]: Start difference. First operand 5751 states and 27112 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:45,134 INFO L93 Difference]: Finished difference Result 5324 states and 23966 transitions. [2022-11-16 11:40:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:40:45,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:40:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:45,151 INFO L225 Difference]: With dead ends: 5324 [2022-11-16 11:40:45,152 INFO L226 Difference]: Without dead ends: 5324 [2022-11-16 11:40:45,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:40:45,152 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 352 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:45,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 159 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-16 11:40:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2022-11-16 11:40:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5170. [2022-11-16 11:40:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5170 states, 5151 states have (on average 4.58202290817317) internal successors, (23602), 5169 states have internal predecessors, (23602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 23602 transitions. [2022-11-16 11:40:45,257 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 23602 transitions. Word has length 21 [2022-11-16 11:40:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:45,257 INFO L495 AbstractCegarLoop]: Abstraction has 5170 states and 23602 transitions. [2022-11-16 11:40:45,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 23602 transitions. [2022-11-16 11:40:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:40:45,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:45,260 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:45,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:40:45,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:45,461 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:40:45,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:45,461 INFO L85 PathProgramCache]: Analyzing trace with hash -662991836, now seen corresponding path program 4 times [2022-11-16 11:40:45,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:45,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134054899] [2022-11-16 11:40:45,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:40:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:45,463 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:40:45,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:40:46,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:40:46,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:40:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:46,301 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:40:46,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:40:46,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-11-16 11:40:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:40:46,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:40:47,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:47,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134054899] [2022-11-16 11:40:47,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134054899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:47,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:47,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 11:40:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286257216] [2022-11-16 11:40:47,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:40:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:40:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:40:47,223 INFO L87 Difference]: Start difference. First operand 5170 states and 23602 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:51,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:52,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:54,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:56,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:57,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:40:59,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:41:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:01,495 INFO L93 Difference]: Finished difference Result 12624 states and 60565 transitions. [2022-11-16 11:41:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:41:01,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 11:41:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:01,554 INFO L225 Difference]: With dead ends: 12624 [2022-11-16 11:41:01,554 INFO L226 Difference]: Without dead ends: 12624 [2022-11-16 11:41:01,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:41:01,554 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 360 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:01,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 120 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2022-11-16 11:41:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12624 states. [2022-11-16 11:41:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12624 to 5153. [2022-11-16 11:41:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5134 states have (on average 4.5816127775613555) internal successors, (23522), 5152 states have internal predecessors, (23522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 23522 transitions. [2022-11-16 11:41:01,743 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 23522 transitions. Word has length 22 [2022-11-16 11:41:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:01,743 INFO L495 AbstractCegarLoop]: Abstraction has 5153 states and 23522 transitions. [2022-11-16 11:41:01,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 23522 transitions. [2022-11-16 11:41:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:41:01,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:01,746 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:01,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:41:01,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:01,946 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:41:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:01,947 INFO L85 PathProgramCache]: Analyzing trace with hash 26057680, now seen corresponding path program 5 times [2022-11-16 11:41:01,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:01,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954640843] [2022-11-16 11:41:01,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:41:01,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:01,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:01,948 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:41:01,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:41:02,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:41:02,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 11:41:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:41:03,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 11:41:04,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:04,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954640843] [2022-11-16 11:41:04,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954640843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:04,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:04,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2022-11-16 11:41:04,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342229060] [2022-11-16 11:41:04,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:04,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:41:04,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:41:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:41:04,170 INFO L87 Difference]: Start difference. First operand 5153 states and 23522 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:13,955 INFO L93 Difference]: Finished difference Result 10148 states and 46067 transitions. [2022-11-16 11:41:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:41:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 11:41:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:13,994 INFO L225 Difference]: With dead ends: 10148 [2022-11-16 11:41:13,994 INFO L226 Difference]: Without dead ends: 10148 [2022-11-16 11:41:13,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=522, Invalid=1830, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:41:13,995 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1129 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:13,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 338 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-16 11:41:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2022-11-16 11:41:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 7435. [2022-11-16 11:41:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 7416 states have (on average 4.671790722761597) internal successors, (34646), 7434 states have internal predecessors, (34646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 34646 transitions. [2022-11-16 11:41:14,221 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 34646 transitions. Word has length 22 [2022-11-16 11:41:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:14,221 INFO L495 AbstractCegarLoop]: Abstraction has 7435 states and 34646 transitions. [2022-11-16 11:41:14,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 34646 transitions. [2022-11-16 11:41:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:41:14,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:14,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:14,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:41:14,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:14,425 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:41:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1521747991, now seen corresponding path program 2 times [2022-11-16 11:41:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:14,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079681223] [2022-11-16 11:41:14,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:41:14,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:14,427 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:41:14,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:41:14,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:41:14,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:41:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:14,948 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:41:14,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:41:15,014 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:41:15,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:41:15,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:41:15,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:15,142 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 11:41:15,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-16 11:41:15,162 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:15,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:41:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:41:15,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:15,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:15,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079681223] [2022-11-16 11:41:15,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079681223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:15,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:15,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:41:15,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548059234] [2022-11-16 11:41:15,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:15,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:15,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:15,630 INFO L87 Difference]: Start difference. First operand 7435 states and 34646 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 11:41:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:15,892 INFO L93 Difference]: Finished difference Result 7411 states and 34425 transitions. [2022-11-16 11:41:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:15,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 22 [2022-11-16 11:41:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:15,926 INFO L225 Difference]: With dead ends: 7411 [2022-11-16 11:41:15,926 INFO L226 Difference]: Without dead ends: 7411 [2022-11-16 11:41:15,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:41:15,927 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:15,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-16 11:41:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2022-11-16 11:41:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 7409. [2022-11-16 11:41:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7409 states, 7390 states have (on average 4.657374830852503) internal successors, (34418), 7408 states have internal predecessors, (34418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7409 states to 7409 states and 34418 transitions. [2022-11-16 11:41:16,134 INFO L78 Accepts]: Start accepts. Automaton has 7409 states and 34418 transitions. Word has length 22 [2022-11-16 11:41:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:16,134 INFO L495 AbstractCegarLoop]: Abstraction has 7409 states and 34418 transitions. [2022-11-16 11:41:16,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 11:41:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 7409 states and 34418 transitions. [2022-11-16 11:41:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:41:16,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:16,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:16,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:16,338 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:41:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1879959180, now seen corresponding path program 1 times [2022-11-16 11:41:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:16,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304413009] [2022-11-16 11:41:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:16,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:16,339 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:41:16,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:41:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:16,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:41:16,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:17,036 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:41:17,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:41:17,133 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 13 treesize of output 9 [2022-11-16 11:41:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:41:17,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:41:17,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:17,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304413009] [2022-11-16 11:41:17,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304413009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:17,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:17,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:41:17,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417132586] [2022-11-16 11:41:17,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:17,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:41:17,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:41:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:41:17,884 INFO L87 Difference]: Start difference. First operand 7409 states and 34418 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 11:41:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:22,173 INFO L93 Difference]: Finished difference Result 7229 states and 32739 transitions. [2022-11-16 11:41:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:41:22,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 22 [2022-11-16 11:41:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:22,196 INFO L225 Difference]: With dead ends: 7229 [2022-11-16 11:41:22,196 INFO L226 Difference]: Without dead ends: 7229 [2022-11-16 11:41:22,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:41:22,197 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 327 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:22,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 164 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:41:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7229 states. [2022-11-16 11:41:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7229 to 6923. [2022-11-16 11:41:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6923 states, 6904 states have (on average 4.627317497103129) internal successors, (31947), 6922 states have internal predecessors, (31947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 31947 transitions. [2022-11-16 11:41:22,338 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 31947 transitions. Word has length 22 [2022-11-16 11:41:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:22,338 INFO L495 AbstractCegarLoop]: Abstraction has 6923 states and 31947 transitions. [2022-11-16 11:41:22,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 11:41:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 31947 transitions. [2022-11-16 11:41:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:41:22,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:22,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:22,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:41:22,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:22,542 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:41:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -879271624, now seen corresponding path program 1 times [2022-11-16 11:41:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501460952] [2022-11-16 11:41:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:22,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:22,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:22,544 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:41:22,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:41:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:22,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:41:22,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:22,972 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 11:41:22,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:22,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501460952] [2022-11-16 11:41:22,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501460952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:22,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:22,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:41:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669247520] [2022-11-16 11:41:22,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:22,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:41:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:22,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:41:22,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:41:22,974 INFO L87 Difference]: Start difference. First operand 6923 states and 31947 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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 11:41:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:23,306 INFO L93 Difference]: Finished difference Result 6978 states and 32069 transitions. [2022-11-16 11:41:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:41:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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 22 [2022-11-16 11:41:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:23,332 INFO L225 Difference]: With dead ends: 6978 [2022-11-16 11:41:23,332 INFO L226 Difference]: Without dead ends: 6872 [2022-11-16 11:41:23,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 11:41:23,332 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:23,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:41:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2022-11-16 11:41:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 6846. [2022-11-16 11:41:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6846 states, 6827 states have (on average 4.651823641423759) internal successors, (31758), 6845 states have internal predecessors, (31758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6846 states to 6846 states and 31758 transitions. [2022-11-16 11:41:23,483 INFO L78 Accepts]: Start accepts. Automaton has 6846 states and 31758 transitions. Word has length 22 [2022-11-16 11:41:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:23,483 INFO L495 AbstractCegarLoop]: Abstraction has 6846 states and 31758 transitions. [2022-11-16 11:41:23,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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 11:41:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6846 states and 31758 transitions. [2022-11-16 11:41:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:41:23,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:23,485 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 1, 1, 1] [2022-11-16 11:41:23,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:41:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:23,686 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-16 11:41:23,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash 7190672, now seen corresponding path program 5 times [2022-11-16 11:41:23,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:23,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572701767] [2022-11-16 11:41:23,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:41:23,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:23,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:23,688 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.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 11:41:23,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92af3936-638f-4bb8-b327-997a980794e7/bin/uautomizer-tPACEb0tL8/mathsat -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 11:41:24,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-16 11:41:24,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 11:41:24,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:24,547 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:41:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:41:25,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:30,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:30,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572701767] [2022-11-16 11:41:30,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572701767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:30,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:30,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 37 [2022-11-16 11:41:30,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930992741] [2022-11-16 11:41:30,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:30,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:41:30,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:41:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:41:30,967 INFO L87 Difference]: Start difference. First operand 6846 states and 31758 transitions. Second operand has 38 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 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)