./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:02:39,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:02:39,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:02:39,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:02:39,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:02:39,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:02:39,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:02:39,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:02:39,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:02:39,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:02:39,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:02:39,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:02:39,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:02:39,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:02:39,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:02:39,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:02:39,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:02:39,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:02:39,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:02:39,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:02:39,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:02:39,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:02:39,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:02:39,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:02:39,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:02:39,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:02:39,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:02:39,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:02:39,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:02:39,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:02:39,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:02:39,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:02:39,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:02:39,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:02:39,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:02:39,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:02:39,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:02:39,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:02:39,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:02:39,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:02:39,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:02:39,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 20:02:39,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:02:39,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:02:39,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:02:39,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:02:39,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:02:39,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:02:39,344 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:02:39,345 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:02:39,345 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:02:39,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:02:39,345 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:02:39,346 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:02:39,346 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:02:39,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:02:39,346 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:02:39,347 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:02:39,347 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:02:39,347 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:02:39,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:02:39,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:02:39,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:02:39,348 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:02:39,349 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:02:39,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:02:39,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:02:39,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:02:39,350 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:02:39,350 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:02:39,350 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:02:39,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:02:39,351 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:02:39,351 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:02:39,351 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:02:39,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:02:39,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:02:39,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:02:39,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:02:39,352 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:02:39,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:02:39,353 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:02:39,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:02:39,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:02:39,353 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_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-11-20 20:02:39,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:02:39,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:02:39,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:02:39,644 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:02:39,644 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:02:39,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 20:02:42,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:02:43,074 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:02:43,074 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 20:02:43,082 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data/2c7cf27e6/3454d3d488514e6e9ee0cf870452f593/FLAG82ca0006a [2022-11-20 20:02:43,097 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data/2c7cf27e6/3454d3d488514e6e9ee0cf870452f593 [2022-11-20 20:02:43,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:02:43,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:02:43,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:02:43,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:02:43,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:02:43,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:02:43" (1/1) ... [2022-11-20 20:02:43,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb4cafd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:43, skipping insertion in model container [2022-11-20 20:02:43,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:02:43" (1/1) ... [2022-11-20 20:02:43,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:02:43,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:02:43,398 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 20:02:43,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:02:43,436 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 20:02:43,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a858005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:43, skipping insertion in model container [2022-11-20 20:02:43,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:02:43,439 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 20:02:43,441 INFO L158 Benchmark]: Toolchain (without parser) took 338.14ms. Allocated memory is still 178.3MB. Free memory was 146.9MB in the beginning and 137.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,441 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 138.4MB. Free memory is still 79.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:02:43,442 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.38ms. Allocated memory is still 178.3MB. Free memory was 146.5MB in the beginning and 137.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 20:02:43,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 138.4MB. Free memory is still 79.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.38ms. Allocated memory is still 178.3MB. Free memory was 146.5MB in the beginning and 137.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 113]: 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_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 20:02:45,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:02:45,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:02:45,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:02:45,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:02:45,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:02:45,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:02:45,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:02:45,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:02:45,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:02:45,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:02:45,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:02:45,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:02:45,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:02:45,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:02:45,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:02:45,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:02:45,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:02:45,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:02:45,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:02:45,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:02:45,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:02:45,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:02:45,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:02:45,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:02:45,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:02:45,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:02:45,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:02:45,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:02:45,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:02:45,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:02:45,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:02:45,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:02:45,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:02:45,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:02:45,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:02:45,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:02:45,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:02:45,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:02:45,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:02:45,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:02:45,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 20:02:45,991 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:02:45,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:02:45,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:02:45,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:02:45,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:02:45,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:02:45,994 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:02:45,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:02:45,994 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:02:45,994 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:02:45,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:02:45,996 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:02:45,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:02:45,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:02:45,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:02:45,997 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:02:45,997 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:02:45,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:02:45,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:02:45,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:02:45,998 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:02:45,998 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:02:45,999 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:02:45,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:02:45,999 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:02:45,999 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:02:46,000 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:02:46,000 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:02:46,001 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:02:46,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:02:46,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:02:46,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:02:46,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:02:46,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:02:46,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:02:46,003 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:02:46,003 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:02:46,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:02:46,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:02:46,003 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_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-11-20 20:02:46,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:02:46,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:02:46,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:02:46,468 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:02:46,469 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:02:46,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 20:02:49,659 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:02:49,911 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:02:49,912 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-20 20:02:49,919 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data/c3ad755aa/53130b00406849a9a3ae0b6a8a25715f/FLAG6c699abc0 [2022-11-20 20:02:49,933 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/data/c3ad755aa/53130b00406849a9a3ae0b6a8a25715f [2022-11-20 20:02:49,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:02:49,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:02:49,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:02:49,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:02:49,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:02:49,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:02:49" (1/1) ... [2022-11-20 20:02:49,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e023d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:49, skipping insertion in model container [2022-11-20 20:02:49,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:02:49" (1/1) ... [2022-11-20 20:02:49,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:02:49,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:02:50,184 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 20:02:50,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:02:50,232 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 20:02:50,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:02:50,277 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 20:02:50,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:02:50,311 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:02:50,352 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-20 20:02:50,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:02:50,394 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:02:50,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50 WrapperNode [2022-11-20 20:02:50,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:02:50,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:02:50,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:02:50,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:02:50,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,477 INFO L138 Inliner]: procedures = 27, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2022-11-20 20:02:50,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:02:50,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:02:50,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:02:50,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:02:50,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:02:50,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:02:50,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:02:50,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:02:50,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (1/1) ... [2022-11-20 20:02:50,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:02:50,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:50,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:02:50,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:02:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:02:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:02:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:02:50,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 20:02:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 20:02:50,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 20:02:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 20:02:50,674 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 20:02:50,674 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 20:02:50,675 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 20:02:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 20:02:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 20:02:50,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:02:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:02:50,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:02:50,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:02:50,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 20:02:50,678 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:02:50,855 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:02:50,857 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:02:51,560 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:02:51,819 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:02:51,819 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 20:02:51,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:02:51 BoogieIcfgContainer [2022-11-20 20:02:51,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:02:51,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:02:51,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:02:51,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:02:51,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:02:49" (1/3) ... [2022-11-20 20:02:51,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a58da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:02:51, skipping insertion in model container [2022-11-20 20:02:51,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:02:50" (2/3) ... [2022-11-20 20:02:51,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a58da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:02:51, skipping insertion in model container [2022-11-20 20:02:51,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:02:51" (3/3) ... [2022-11-20 20:02:51,835 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-11-20 20:02:51,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:02:51,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-20 20:02:51,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:02:51,972 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 20:02:52,023 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:02:52,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 177 transitions, 378 flow [2022-11-20 20:02:52,060 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 177 transitions, 378 flow [2022-11-20 20:02:52,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 177 transitions, 378 flow [2022-11-20 20:02:52,181 INFO L130 PetriNetUnfolder]: 12/174 cut-off events. [2022-11-20 20:02:52,181 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 20:02:52,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 12/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2022-11-20 20:02:52,193 INFO L119 LiptonReduction]: Number of co-enabled transitions 2418 [2022-11-20 20:03:23,283 INFO L134 LiptonReduction]: Checked pairs total: 3808 [2022-11-20 20:03:23,284 INFO L136 LiptonReduction]: Total number of compositions: 174 [2022-11-20 20:03:23,292 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 51 transitions, 126 flow [2022-11-20 20:03:23,382 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:23,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:03:23,407 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;@1b594ab5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:03:23,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-20 20:03:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:03:23,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:23,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:03:23,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 27162, now seen corresponding path program 1 times [2022-11-20 20:03:23,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:23,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172196415] [2022-11-20 20:03:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:23,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:23,444 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:23,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 20:03:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:03:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:23,768 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-20 20:03:23,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-20 20:03:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:23,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:23,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:23,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172196415] [2022-11-20 20:03:23,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172196415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:23,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:23,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:23,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146610712] [2022-11-20 20:03:23,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:23,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:23,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:23,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:23,889 INFO L87 Difference]: Start difference. First operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:24,160 INFO L93 Difference]: Finished difference Result 1038 states and 3595 transitions. [2022-11-20 20:03:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:24,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 20:03:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:24,196 INFO L225 Difference]: With dead ends: 1038 [2022-11-20 20:03:24,197 INFO L226 Difference]: Without dead ends: 1038 [2022-11-20 20:03:24,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:24,203 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:24,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-20 20:03:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-20 20:03:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2022-11-20 20:03:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 905 states have (on average 3.972375690607735) internal successors, (3595), 1037 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3595 transitions. [2022-11-20 20:03:24,354 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3595 transitions. Word has length 2 [2022-11-20 20:03:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:24,355 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3595 transitions. [2022-11-20 20:03:24,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3595 transitions. [2022-11-20 20:03:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:03:24,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:24,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:03:24,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:24,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:24,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash 27163, now seen corresponding path program 1 times [2022-11-20 20:03:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:24,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526829419] [2022-11-20 20:03:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:24,570 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:24,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:24,573 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 20:03:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:03:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,822 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 20:03:24,823 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 [2022-11-20 20:03:24,851 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 20:03:24,852 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 [2022-11-20 20:03:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:24,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:24,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526829419] [2022-11-20 20:03:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526829419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:24,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:24,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:24,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311909441] [2022-11-20 20:03:24,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:24,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:24,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:24,903 INFO L87 Difference]: Start difference. First operand 1038 states and 3595 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:25,094 INFO L93 Difference]: Finished difference Result 1038 states and 3594 transitions. [2022-11-20 20:03:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 20:03:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:25,103 INFO L225 Difference]: With dead ends: 1038 [2022-11-20 20:03:25,103 INFO L226 Difference]: Without dead ends: 1038 [2022-11-20 20:03:25,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:25,105 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:25,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-20 20:03:25,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-20 20:03:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2022-11-20 20:03:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 905 states have (on average 3.971270718232044) internal successors, (3594), 1037 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3594 transitions. [2022-11-20 20:03:25,173 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3594 transitions. Word has length 2 [2022-11-20 20:03:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:25,173 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3594 transitions. [2022-11-20 20:03:25,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3594 transitions. [2022-11-20 20:03:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:03:25,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:25,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:03:25,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:25,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash 27003, now seen corresponding path program 1 times [2022-11-20 20:03:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:25,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364251470] [2022-11-20 20:03:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:25,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:25,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:25,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 20:03:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:03:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:25,556 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:03:25,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:25,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:25,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364251470] [2022-11-20 20:03:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364251470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:25,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:25,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837375062] [2022-11-20 20:03:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:25,580 INFO L87 Difference]: Start difference. First operand 1038 states and 3594 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:25,804 INFO L93 Difference]: Finished difference Result 1037 states and 3592 transitions. [2022-11-20 20:03:25,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:25,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 20:03:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:25,813 INFO L225 Difference]: With dead ends: 1037 [2022-11-20 20:03:25,813 INFO L226 Difference]: Without dead ends: 1037 [2022-11-20 20:03:25,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:25,814 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:25,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:03:25,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-11-20 20:03:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2022-11-20 20:03:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 905 states have (on average 3.969060773480663) internal successors, (3592), 1036 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3592 transitions. [2022-11-20 20:03:25,853 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3592 transitions. Word has length 2 [2022-11-20 20:03:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:25,854 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 3592 transitions. [2022-11-20 20:03:25,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3592 transitions. [2022-11-20 20:03:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 20:03:25,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:25,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 20:03:25,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:03:26,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:26,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:26,067 INFO L85 PathProgramCache]: Analyzing trace with hash 27004, now seen corresponding path program 1 times [2022-11-20 20:03:26,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:26,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088500269] [2022-11-20 20:03:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:26,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:26,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:26,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:26,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 20:03:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:03:26,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:26,415 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:26,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:26,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:26,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088500269] [2022-11-20 20:03:26,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088500269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:26,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:26,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:26,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448701308] [2022-11-20 20:03:26,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:26,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:26,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:26,464 INFO L87 Difference]: Start difference. First operand 1037 states and 3592 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:26,902 INFO L93 Difference]: Finished difference Result 2068 states and 7174 transitions. [2022-11-20 20:03:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 20:03:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:26,922 INFO L225 Difference]: With dead ends: 2068 [2022-11-20 20:03:26,922 INFO L226 Difference]: Without dead ends: 2068 [2022-11-20 20:03:26,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:26,925 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:26,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:03:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-11-20 20:03:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1037. [2022-11-20 20:03:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 905 states have (on average 3.9679558011049725) internal successors, (3591), 1036 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3591 transitions. [2022-11-20 20:03:27,002 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3591 transitions. Word has length 2 [2022-11-20 20:03:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:27,002 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 3591 transitions. [2022-11-20 20:03:27,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3591 transitions. [2022-11-20 20:03:27,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:03:27,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:27,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:03:27,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:27,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:27,215 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:27,215 INFO L85 PathProgramCache]: Analyzing trace with hash 841749, now seen corresponding path program 1 times [2022-11-20 20:03:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:27,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144520016] [2022-11-20 20:03:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:27,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:27,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:27,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:27,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 20:03:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:03:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:27,419 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-20 20:03:27,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-20 20:03:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:03:27,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:27,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144520016] [2022-11-20 20:03:27,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144520016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:27,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:27,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:27,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622174854] [2022-11-20 20:03:27,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:27,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:27,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:27,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:27,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:27,522 INFO L87 Difference]: Start difference. First operand 1037 states and 3591 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:27,695 INFO L93 Difference]: Finished difference Result 1036 states and 3590 transitions. [2022-11-20 20:03:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:27,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:03:27,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:27,704 INFO L225 Difference]: With dead ends: 1036 [2022-11-20 20:03:27,704 INFO L226 Difference]: Without dead ends: 1036 [2022-11-20 20:03:27,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:27,707 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:27,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-20 20:03:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-11-20 20:03:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1036. [2022-11-20 20:03:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 905 states have (on average 3.9668508287292816) internal successors, (3590), 1035 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3590 transitions. [2022-11-20 20:03:27,749 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3590 transitions. Word has length 3 [2022-11-20 20:03:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:27,750 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 3590 transitions. [2022-11-20 20:03:27,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3590 transitions. [2022-11-20 20:03:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:03:27,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:27,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:03:27,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:27,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:27,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 841750, now seen corresponding path program 1 times [2022-11-20 20:03:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814505085] [2022-11-20 20:03:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:27,964 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 [2022-11-20 20:03:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:27,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:28,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 20:03:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:03:28,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:28,206 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 20:03:28,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-20 20:03:28,229 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 20:03:28,229 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 [2022-11-20 20:03:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:28,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:28,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:28,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814505085] [2022-11-20 20:03:28,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814505085] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 20:03:28,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:03:28,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-20 20:03:28,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147269314] [2022-11-20 20:03:28,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:28,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:03:28,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:03:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:03:28,463 INFO L87 Difference]: Start difference. First operand 1036 states and 3590 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:28,756 INFO L93 Difference]: Finished difference Result 855 states and 2869 transitions. [2022-11-20 20:03:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:28,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:03:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:28,763 INFO L225 Difference]: With dead ends: 855 [2022-11-20 20:03:28,763 INFO L226 Difference]: Without dead ends: 855 [2022-11-20 20:03:28,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:03:28,764 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:28,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:03:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-20 20:03:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2022-11-20 20:03:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 752 states have (on average 3.815159574468085) internal successors, (2869), 854 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2869 transitions. [2022-11-20 20:03:28,795 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2869 transitions. Word has length 3 [2022-11-20 20:03:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:28,795 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 2869 transitions. [2022-11-20 20:03:28,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2869 transitions. [2022-11-20 20:03:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:03:28,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:28,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:03:28,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:03:29,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:29,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash 841591, now seen corresponding path program 1 times [2022-11-20 20:03:29,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:29,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746427741] [2022-11-20 20:03:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:29,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:29,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:29,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 20:03:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:29,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:03:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:29,241 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:29,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:29,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:29,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746427741] [2022-11-20 20:03:29,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746427741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1300460132] [2022-11-20 20:03:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:29,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:29,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:29,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 20:03:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:29,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:03:29,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:29,958 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:29,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:03:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:29,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:30,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1300460132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:30,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246554298] [2022-11-20 20:03:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:30,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:30,074 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:30,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:03:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:30,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:03:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:30,323 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:30,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:30,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:30,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246554298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:30,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:03:30,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-20 20:03:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778218229] [2022-11-20 20:03:30,565 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:30,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:03:30,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:03:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:03:30,567 INFO L87 Difference]: Start difference. First operand 855 states and 2869 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:32,460 INFO L93 Difference]: Finished difference Result 3411 states and 11464 transitions. [2022-11-20 20:03:32,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:03:32,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:03:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:32,488 INFO L225 Difference]: With dead ends: 3411 [2022-11-20 20:03:32,488 INFO L226 Difference]: Without dead ends: 3411 [2022-11-20 20:03:32,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:03:32,491 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 389 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:32,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 18 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 20:03:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2022-11-20 20:03:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 858. [2022-11-20 20:03:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 755 states have (on average 3.80794701986755) internal successors, (2875), 857 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2875 transitions. [2022-11-20 20:03:32,578 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2875 transitions. Word has length 3 [2022-11-20 20:03:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:32,579 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 2875 transitions. [2022-11-20 20:03:32,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2875 transitions. [2022-11-20 20:03:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:03:32,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:32,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:03:32,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:32,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:33,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-20 20:03:33,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:33,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash 26125162, now seen corresponding path program 1 times [2022-11-20 20:03:33,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:33,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202016375] [2022-11-20 20:03:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:33,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:33,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:33,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 20:03:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:33,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:03:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:33,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:33,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:33,436 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-20 20:03:33,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-20 20:03:33,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 20:03:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:33,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:33,547 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:33,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202016375] [2022-11-20 20:03:33,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202016375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:33,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:33,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:33,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966049953] [2022-11-20 20:03:33,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:33,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:33,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:33,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:33,558 INFO L87 Difference]: Start difference. First operand 858 states and 2875 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-20 20:03:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:33,703 INFO L93 Difference]: Finished difference Result 861 states and 2885 transitions. [2022-11-20 20:03:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:33,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2022-11-20 20:03:33,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:33,709 INFO L225 Difference]: With dead ends: 861 [2022-11-20 20:03:33,709 INFO L226 Difference]: Without dead ends: 861 [2022-11-20 20:03:33,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:33,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:33,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 20:03:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-20 20:03:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-11-20 20:03:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 758 states have (on average 3.8060686015831133) internal successors, (2885), 860 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2885 transitions. [2022-11-20 20:03:33,743 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2885 transitions. Word has length 4 [2022-11-20 20:03:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:33,744 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 2885 transitions. [2022-11-20 20:03:33,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-20 20:03:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2885 transitions. [2022-11-20 20:03:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:03:33,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:33,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:03:33,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:33,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:33,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 26125163, now seen corresponding path program 1 times [2022-11-20 20:03:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:33,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000452663] [2022-11-20 20:03:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:33,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:33,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:33,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 20:03:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:03:34,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:34,146 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:03:34,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:03:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:34,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:34,275 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:34,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000452663] [2022-11-20 20:03:34,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000452663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:34,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:34,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916538709] [2022-11-20 20:03:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:34,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:34,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:34,278 INFO L87 Difference]: Start difference. First operand 861 states and 2885 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-20 20:03:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:34,417 INFO L93 Difference]: Finished difference Result 861 states and 2883 transitions. [2022-11-20 20:03:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:34,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2022-11-20 20:03:34,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:34,429 INFO L225 Difference]: With dead ends: 861 [2022-11-20 20:03:34,429 INFO L226 Difference]: Without dead ends: 861 [2022-11-20 20:03:34,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:34,430 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:34,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 20:03:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-20 20:03:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-11-20 20:03:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 758 states have (on average 3.8034300791556728) internal successors, (2883), 860 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2883 transitions. [2022-11-20 20:03:34,462 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2883 transitions. Word has length 4 [2022-11-20 20:03:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:34,462 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 2883 transitions. [2022-11-20 20:03:34,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-20 20:03:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2883 transitions. [2022-11-20 20:03:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:03:34,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:34,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:03:34,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:34,675 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash 808943269, now seen corresponding path program 1 times [2022-11-20 20:03:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:34,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921684822] [2022-11-20 20:03:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:34,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:34,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:34,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:34,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 20:03:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:03:34,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:34,937 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 20:03:34,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 20:03:34,953 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 [2022-11-20 20:03:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:35,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:35,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921684822] [2022-11-20 20:03:35,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921684822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:35,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1177989064] [2022-11-20 20:03:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:35,429 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:35,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:35,430 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:35,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-20 20:03:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:03:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:35,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:35,762 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-20 20:03:35,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-20 20:03:35,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 20:03:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:03:35,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:35,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1177989064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:35,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:35,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-20 20:03:35,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837033374] [2022-11-20 20:03:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:35,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:03:35,908 INFO L87 Difference]: Start difference. First operand 861 states and 2883 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:36,044 INFO L93 Difference]: Finished difference Result 861 states and 2887 transitions. [2022-11-20 20:03:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:03:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:36,052 INFO L225 Difference]: With dead ends: 861 [2022-11-20 20:03:36,052 INFO L226 Difference]: Without dead ends: 861 [2022-11-20 20:03:36,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:03:36,054 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:36,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 20:03:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-20 20:03:36,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 861. [2022-11-20 20:03:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 758 states have (on average 3.808707124010554) internal successors, (2887), 860 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2887 transitions. [2022-11-20 20:03:36,093 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2887 transitions. Word has length 5 [2022-11-20 20:03:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:36,093 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 2887 transitions. [2022-11-20 20:03:36,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2887 transitions. [2022-11-20 20:03:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:03:36,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:36,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:03:36,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:03:36,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:36,507 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 808943270, now seen corresponding path program 1 times [2022-11-20 20:03:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793859250] [2022-11-20 20:03:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:36,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:36,508 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:36,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 20:03:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:36,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:03:36,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:36,677 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 20:03:36,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 20:03:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:03:36,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:36,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:36,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793859250] [2022-11-20 20:03:36,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793859250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:36,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:36,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091777425] [2022-11-20 20:03:36,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:36,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:36,811 INFO L87 Difference]: Start difference. First operand 861 states and 2887 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:36,946 INFO L93 Difference]: Finished difference Result 860 states and 2884 transitions. [2022-11-20 20:03:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:03:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:36,952 INFO L225 Difference]: With dead ends: 860 [2022-11-20 20:03:36,952 INFO L226 Difference]: Without dead ends: 860 [2022-11-20 20:03:36,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:36,953 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:36,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 20:03:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-20 20:03:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 857. [2022-11-20 20:03:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 754 states have (on average 3.8143236074270557) internal successors, (2876), 856 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2876 transitions. [2022-11-20 20:03:36,980 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2876 transitions. Word has length 5 [2022-11-20 20:03:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:36,981 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 2876 transitions. [2022-11-20 20:03:36,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2876 transitions. [2022-11-20 20:03:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:03:36,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:36,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:03:36,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 20:03:37,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:37,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash 809875026, now seen corresponding path program 1 times [2022-11-20 20:03:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:37,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937941863] [2022-11-20 20:03:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:37,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:37,195 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:37,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 20:03:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:37,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:03:37,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:37,359 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 20:03:37,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:37,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:37,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:37,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937941863] [2022-11-20 20:03:37,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937941863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:37,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:37,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:03:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680637257] [2022-11-20 20:03:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:37,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:03:37,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:03:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:03:37,397 INFO L87 Difference]: Start difference. First operand 857 states and 2876 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:37,619 INFO L93 Difference]: Finished difference Result 525 states and 1727 transitions. [2022-11-20 20:03:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:03:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 20:03:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:37,622 INFO L225 Difference]: With dead ends: 525 [2022-11-20 20:03:37,623 INFO L226 Difference]: Without dead ends: 525 [2022-11-20 20:03:37,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:03:37,623 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:37,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:03:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-20 20:03:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-11-20 20:03:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 484 states have (on average 3.5681818181818183) internal successors, (1727), 524 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1727 transitions. [2022-11-20 20:03:37,664 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1727 transitions. Word has length 5 [2022-11-20 20:03:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:37,664 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 1727 transitions. [2022-11-20 20:03:37,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:37,665 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1727 transitions. [2022-11-20 20:03:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:03:37,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:37,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:03:37,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:37,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:37,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:37,878 INFO L85 PathProgramCache]: Analyzing trace with hash 809875027, now seen corresponding path program 1 times [2022-11-20 20:03:37,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:37,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641571212] [2022-11-20 20:03:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:37,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:37,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:37,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:37,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 20:03:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:03:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:38,108 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:38,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:03:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:38,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:38,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641571212] [2022-11-20 20:03:38,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641571212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:38,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:38,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:03:38,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705103939] [2022-11-20 20:03:38,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:38,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:03:38,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:03:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:03:38,207 INFO L87 Difference]: Start difference. First operand 525 states and 1727 transitions. Second operand has 5 states, 4 states have (on average 1.25) 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) [2022-11-20 20:03:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:38,678 INFO L93 Difference]: Finished difference Result 842 states and 2745 transitions. [2022-11-20 20:03:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:03:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) 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 [2022-11-20 20:03:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:38,683 INFO L225 Difference]: With dead ends: 842 [2022-11-20 20:03:38,684 INFO L226 Difference]: Without dead ends: 842 [2022-11-20 20:03:38,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:03:38,684 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 118 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:38,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 7 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:03:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-20 20:03:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 621. [2022-11-20 20:03:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 580 states have (on average 3.722413793103448) internal successors, (2159), 620 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 2159 transitions. [2022-11-20 20:03:38,715 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 2159 transitions. Word has length 5 [2022-11-20 20:03:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:38,716 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 2159 transitions. [2022-11-20 20:03:38,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) 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) [2022-11-20 20:03:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 2159 transitions. [2022-11-20 20:03:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:03:38,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:38,717 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 20:03:38,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:38,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:38,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:38,929 INFO L85 PathProgramCache]: Analyzing trace with hash -693530564, now seen corresponding path program 2 times [2022-11-20 20:03:38,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:38,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910370079] [2022-11-20 20:03:38,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:03:38,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:38,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:38,931 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:38,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 20:03:39,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:03:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:03:39,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:03:39,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:39,173 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:03:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:39,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:40,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:40,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910370079] [2022-11-20 20:03:40,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910370079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:40,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [175936753] [2022-11-20 20:03:40,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:03:40,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:40,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:40,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-20 20:03:40,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:03:40,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:03:40,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:03:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:40,629 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:40,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:40,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:40,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [175936753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:40,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902102401] [2022-11-20 20:03:40,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:03:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:40,915 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:40,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 20:03:41,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:03:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:03:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:03:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:41,207 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:41,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:41,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:41,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902102401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:41,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:03:41,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-20 20:03:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335740462] [2022-11-20 20:03:41,448 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:03:41,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:03:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:03:41,449 INFO L87 Difference]: Start difference. First operand 621 states and 2159 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:47,387 INFO L93 Difference]: Finished difference Result 6153 states and 21494 transitions. [2022-11-20 20:03:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:03:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:03:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:47,433 INFO L225 Difference]: With dead ends: 6153 [2022-11-20 20:03:47,434 INFO L226 Difference]: Without dead ends: 6153 [2022-11-20 20:03:47,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 20:03:47,435 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1224 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:47,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 87 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-20 20:03:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2022-11-20 20:03:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 627. [2022-11-20 20:03:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 586 states have (on average 3.704778156996587) internal successors, (2171), 626 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 2171 transitions. [2022-11-20 20:03:47,517 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 2171 transitions. Word has length 6 [2022-11-20 20:03:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:47,517 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 2171 transitions. [2022-11-20 20:03:47,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 2171 transitions. [2022-11-20 20:03:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:03:47,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:47,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:03:47,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:47,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:47,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:48,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:48,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash -663673315, now seen corresponding path program 1 times [2022-11-20 20:03:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:48,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378438232] [2022-11-20 20:03:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:48,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:48,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:48,124 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:48,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 20:03:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:48,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:03:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:48,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:48,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:48,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:48,340 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 20:03:48,340 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 [2022-11-20 20:03:48,367 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 [2022-11-20 20:03:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:48,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:48,452 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378438232] [2022-11-20 20:03:48,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378438232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:48,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:48,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028539144] [2022-11-20 20:03:48,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:48,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:48,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:48,454 INFO L87 Difference]: Start difference. First operand 627 states and 2171 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:48,572 INFO L93 Difference]: Finished difference Result 631 states and 2179 transitions. [2022-11-20 20:03:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:48,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:03:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:48,575 INFO L225 Difference]: With dead ends: 631 [2022-11-20 20:03:48,576 INFO L226 Difference]: Without dead ends: 631 [2022-11-20 20:03:48,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:48,577 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:48,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-20 20:03:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-20 20:03:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 631. [2022-11-20 20:03:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 590 states have (on average 3.6932203389830507) internal successors, (2179), 630 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2179 transitions. [2022-11-20 20:03:48,616 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2179 transitions. Word has length 6 [2022-11-20 20:03:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:48,617 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 2179 transitions. [2022-11-20 20:03:48,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2179 transitions. [2022-11-20 20:03:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:03:48,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:48,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:03:48,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:48,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:48,827 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:48,827 INFO L85 PathProgramCache]: Analyzing trace with hash -663673314, now seen corresponding path program 1 times [2022-11-20 20:03:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5746531] [2022-11-20 20:03:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:48,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:48,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:48,829 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:48,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 20:03:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 20:03:48,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:49,012 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-20 20:03:49,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-20 20:03:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:49,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:49,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:49,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5746531] [2022-11-20 20:03:49,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5746531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:49,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:49,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:49,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669372684] [2022-11-20 20:03:49,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:49,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:49,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:49,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:49,051 INFO L87 Difference]: Start difference. First operand 631 states and 2179 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:49,225 INFO L93 Difference]: Finished difference Result 603 states and 2097 transitions. [2022-11-20 20:03:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:49,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:03:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:49,229 INFO L225 Difference]: With dead ends: 603 [2022-11-20 20:03:49,230 INFO L226 Difference]: Without dead ends: 603 [2022-11-20 20:03:49,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:49,231 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:49,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:03:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-11-20 20:03:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2022-11-20 20:03:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 568 states have (on average 3.691901408450704) internal successors, (2097), 602 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2097 transitions. [2022-11-20 20:03:49,255 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2097 transitions. Word has length 6 [2022-11-20 20:03:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:49,255 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 2097 transitions. [2022-11-20 20:03:49,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2097 transitions. [2022-11-20 20:03:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:03:49,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:49,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:03:49,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:49,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:49,467 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash -663672735, now seen corresponding path program 1 times [2022-11-20 20:03:49,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:49,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925166410] [2022-11-20 20:03:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:49,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:49,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:49,469 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:49,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 20:03:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:03:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:49,693 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:49,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:03:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:49,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:49,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925166410] [2022-11-20 20:03:49,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925166410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:49,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:49,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:03:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219192498] [2022-11-20 20:03:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:49,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:03:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:03:49,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:03:49,831 INFO L87 Difference]: Start difference. First operand 603 states and 2097 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:50,064 INFO L93 Difference]: Finished difference Result 603 states and 2096 transitions. [2022-11-20 20:03:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:03:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:03:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:50,066 INFO L225 Difference]: With dead ends: 603 [2022-11-20 20:03:50,067 INFO L226 Difference]: Without dead ends: 603 [2022-11-20 20:03:50,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:03:50,068 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:50,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-11-20 20:03:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-11-20 20:03:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 603. [2022-11-20 20:03:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 568 states have (on average 3.6901408450704225) internal successors, (2096), 602 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2096 transitions. [2022-11-20 20:03:50,086 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2096 transitions. Word has length 6 [2022-11-20 20:03:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:50,087 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 2096 transitions. [2022-11-20 20:03:50,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2096 transitions. [2022-11-20 20:03:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:03:50,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:50,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:03:50,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:03:50,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:50,300 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash -663503363, now seen corresponding path program 1 times [2022-11-20 20:03:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:50,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545833883] [2022-11-20 20:03:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:50,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:50,303 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:50,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 20:03:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:50,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:03:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:50,523 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-20 20:03:50,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 46 [2022-11-20 20:03:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:50,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:50,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545833883] [2022-11-20 20:03:50,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545833883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:50,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:50,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:50,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049144240] [2022-11-20 20:03:50,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:50,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:50,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:50,559 INFO L87 Difference]: Start difference. First operand 603 states and 2096 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:50,723 INFO L93 Difference]: Finished difference Result 573 states and 2006 transitions. [2022-11-20 20:03:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:03:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:50,726 INFO L225 Difference]: With dead ends: 573 [2022-11-20 20:03:50,726 INFO L226 Difference]: Without dead ends: 573 [2022-11-20 20:03:50,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:50,727 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:50,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:03:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-20 20:03:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2022-11-20 20:03:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 544 states have (on average 3.6875) internal successors, (2006), 572 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 2006 transitions. [2022-11-20 20:03:50,745 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 2006 transitions. Word has length 6 [2022-11-20 20:03:50,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:50,745 INFO L495 AbstractCegarLoop]: Abstraction has 573 states and 2006 transitions. [2022-11-20 20:03:50,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 2006 transitions. [2022-11-20 20:03:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:03:50,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:50,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:03:50,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:03:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:50,958 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash -663503362, now seen corresponding path program 1 times [2022-11-20 20:03:50,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801025935] [2022-11-20 20:03:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:50,959 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 [2022-11-20 20:03:50,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:50,960 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:50,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 20:03:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:51,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:03:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:51,151 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 20:03:51,152 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 [2022-11-20 20:03:51,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-20 20:03:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:51,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:03:51,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:51,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801025935] [2022-11-20 20:03:51,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801025935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:51,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:51,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:03:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138340123] [2022-11-20 20:03:51,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:51,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:03:51,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:03:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:51,199 INFO L87 Difference]: Start difference. First operand 573 states and 2006 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:51,346 INFO L93 Difference]: Finished difference Result 543 states and 1916 transitions. [2022-11-20 20:03:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:03:51,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:03:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:51,349 INFO L225 Difference]: With dead ends: 543 [2022-11-20 20:03:51,349 INFO L226 Difference]: Without dead ends: 543 [2022-11-20 20:03:51,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:03:51,350 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:51,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:03:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-20 20:03:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2022-11-20 20:03:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 520 states have (on average 3.6846153846153844) internal successors, (1916), 542 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1916 transitions. [2022-11-20 20:03:51,366 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1916 transitions. Word has length 6 [2022-11-20 20:03:51,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:51,366 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 1916 transitions. [2022-11-20 20:03:51,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:51,367 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1916 transitions. [2022-11-20 20:03:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:03:51,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:51,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:03:51,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:51,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:51,579 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 5250712, now seen corresponding path program 1 times [2022-11-20 20:03:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:51,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952930781] [2022-11-20 20:03:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:51,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:03:51,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:51,581 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:51,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 20:03:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:03:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:51,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:51,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952930781] [2022-11-20 20:03:51,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952930781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [47148281] [2022-11-20 20:03:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:51,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:51,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:51,891 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:51,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-20 20:03:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:03:52,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:52,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:52,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [47148281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759783598] [2022-11-20 20:03:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:52,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:52,209 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:52,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 20:03:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:03:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:52,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:52,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759783598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:52,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:03:52,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 13 [2022-11-20 20:03:52,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138523564] [2022-11-20 20:03:52,525 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:52,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:03:52,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:52,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:03:52,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:03:52,526 INFO L87 Difference]: Start difference. First operand 543 states and 1916 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) [2022-11-20 20:03:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:53,761 INFO L93 Difference]: Finished difference Result 1586 states and 5496 transitions. [2022-11-20 20:03:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:03:53,761 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 7 [2022-11-20 20:03:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:53,768 INFO L225 Difference]: With dead ends: 1586 [2022-11-20 20:03:53,769 INFO L226 Difference]: Without dead ends: 1586 [2022-11-20 20:03:53,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:03:53,770 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 286 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:53,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 48 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 20:03:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-11-20 20:03:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 715. [2022-11-20 20:03:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 692 states have (on average 3.6546242774566475) internal successors, (2529), 714 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:03:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2529 transitions. [2022-11-20 20:03:53,800 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2529 transitions. Word has length 7 [2022-11-20 20:03:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:53,801 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 2529 transitions. [2022-11-20 20:03:53,801 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) [2022-11-20 20:03:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2529 transitions. [2022-11-20 20:03:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:03:53,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:53,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:03:53,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:54,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:54,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:54,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:54,414 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:03:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash 5251292, now seen corresponding path program 1 times [2022-11-20 20:03:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:03:54,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789361210] [2022-11-20 20:03:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:54,415 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 [2022-11-20 20:03:54,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:03:54,416 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:03:54,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 20:03:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:03:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:54,693 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:03:54,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:03:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:03:54,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:03:55,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:03:55,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789361210] [2022-11-20 20:03:55,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789361210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98864236] [2022-11-20 20:03:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:55,241 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:03:55,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:03:55,242 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:03:55,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-20 20:03:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:03:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:55,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:55,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98864236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:55,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717845534] [2022-11-20 20:03:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:55,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:55,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:55,848 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:55,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 20:03:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:55,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:03:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:56,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:03:56,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717845534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:56,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:03:56,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-20 20:03:56,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376670218] [2022-11-20 20:03:56,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:56,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:03:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:03:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:03:56,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:03:56,111 INFO L87 Difference]: Start difference. First operand 715 states and 2529 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:01,090 INFO L93 Difference]: Finished difference Result 2068 states and 6963 transitions. [2022-11-20 20:04:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:04:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:04:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:01,097 INFO L225 Difference]: With dead ends: 2068 [2022-11-20 20:04:01,097 INFO L226 Difference]: Without dead ends: 2068 [2022-11-20 20:04:01,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 20:04:01,099 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 827 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:01,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 128 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 20:04:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-11-20 20:04:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1269. [2022-11-20 20:04:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1246 states have (on average 3.7287319422150884) internal successors, (4646), 1268 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4646 transitions. [2022-11-20 20:04:01,146 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4646 transitions. Word has length 7 [2022-11-20 20:04:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:01,147 INFO L495 AbstractCegarLoop]: Abstraction has 1269 states and 4646 transitions. [2022-11-20 20:04:01,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4646 transitions. [2022-11-20 20:04:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:04:01,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:01,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:01,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:01,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:01,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-20 20:04:01,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:01,752 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 5251425, now seen corresponding path program 1 times [2022-11-20 20:04:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:01,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826265559] [2022-11-20 20:04:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:01,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:01,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:01,754 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:01,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 20:04:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,019 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 20:04:02,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 20:04:02,033 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 [2022-11-20 20:04:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:02,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:02,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:02,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826265559] [2022-11-20 20:04:02,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826265559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:02,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1424103521] [2022-11-20 20:04:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:02,550 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:02,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:04:02,551 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:04:02,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-20 20:04:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:02,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:04:02,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:02,973 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-20 20:04:02,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-20 20:04:02,990 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 42 treesize of output 38 [2022-11-20 20:04:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:03,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:03,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1424103521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:03,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:04:03,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-20 20:04:03,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901514249] [2022-11-20 20:04:03,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:03,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:04:03,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:04:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:04:03,110 INFO L87 Difference]: Start difference. First operand 1269 states and 4646 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:03,216 INFO L93 Difference]: Finished difference Result 1264 states and 4631 transitions. [2022-11-20 20:04:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:04:03,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:04:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:03,220 INFO L225 Difference]: With dead ends: 1264 [2022-11-20 20:04:03,221 INFO L226 Difference]: Without dead ends: 1264 [2022-11-20 20:04:03,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:04:03,222 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:03,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 20:04:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-11-20 20:04:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1264. [2022-11-20 20:04:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1241 states have (on average 3.731668009669621) internal successors, (4631), 1263 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4631 transitions. [2022-11-20 20:04:03,275 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4631 transitions. Word has length 7 [2022-11-20 20:04:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:03,275 INFO L495 AbstractCegarLoop]: Abstraction has 1264 states and 4631 transitions. [2022-11-20 20:04:03,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4631 transitions. [2022-11-20 20:04:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:04:03,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:03,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:03,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:03,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:03,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:03,680 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:03,681 INFO L85 PathProgramCache]: Analyzing trace with hash 906227397, now seen corresponding path program 1 times [2022-11-20 20:04:03,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412129470] [2022-11-20 20:04:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:03,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:03,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:03,683 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:03,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 20:04:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:03,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:03,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:03,952 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:03,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:04,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:04,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:04,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412129470] [2022-11-20 20:04:04,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412129470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:04,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:04,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:04,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468051291] [2022-11-20 20:04:04,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:04,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:04,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:04,137 INFO L87 Difference]: Start difference. First operand 1264 states and 4631 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) [2022-11-20 20:04:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:04,296 INFO L93 Difference]: Finished difference Result 1266 states and 4640 transitions. [2022-11-20 20:04:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:04,296 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 [2022-11-20 20:04:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:04,300 INFO L225 Difference]: With dead ends: 1266 [2022-11-20 20:04:04,300 INFO L226 Difference]: Without dead ends: 1266 [2022-11-20 20:04:04,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:04,300 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:04,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-20 20:04:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-11-20 20:04:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1266. [2022-11-20 20:04:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1243 states have (on average 3.7329042638777152) internal successors, (4640), 1265 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4640 transitions. [2022-11-20 20:04:04,335 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4640 transitions. Word has length 7 [2022-11-20 20:04:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:04,335 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 4640 transitions. [2022-11-20 20:04:04,335 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) [2022-11-20 20:04:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4640 transitions. [2022-11-20 20:04:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:04:04,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:04,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:04,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:04,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:04,548 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 162794676, now seen corresponding path program 1 times [2022-11-20 20:04:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074091936] [2022-11-20 20:04:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:04,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:04,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:04,549 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:04,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 20:04:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:04:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:04,861 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 20:04:04,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 20:04:04,875 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 [2022-11-20 20:04:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:05,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:05,369 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074091936] [2022-11-20 20:04:05,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074091936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362882056] [2022-11-20 20:04:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:05,370 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:04:05,371 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:04:05,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-20 20:04:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:05,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:04:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:04:05,753 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-20 20:04:05,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-20 20:04:05,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 20:04:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:04:05,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:05,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [362882056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:05,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:04:05,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-20 20:04:05,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090478777] [2022-11-20 20:04:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:05,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:04:05,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:04:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:04:05,931 INFO L87 Difference]: Start difference. First operand 1266 states and 4640 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:06,038 INFO L93 Difference]: Finished difference Result 1265 states and 4639 transitions. [2022-11-20 20:04:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:04:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:04:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:06,042 INFO L225 Difference]: With dead ends: 1265 [2022-11-20 20:04:06,042 INFO L226 Difference]: Without dead ends: 1265 [2022-11-20 20:04:06,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:04:06,043 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:06,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 20:04:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-11-20 20:04:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1265. [2022-11-20 20:04:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1243 states have (on average 3.732099758648431) internal successors, (4639), 1264 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4639 transitions. [2022-11-20 20:04:06,077 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4639 transitions. Word has length 8 [2022-11-20 20:04:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:06,077 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 4639 transitions. [2022-11-20 20:04:06,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4639 transitions. [2022-11-20 20:04:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:04:06,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:06,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:06,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:06,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-20 20:04:06,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:06,482 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:06,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1971718876, now seen corresponding path program 1 times [2022-11-20 20:04:06,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:06,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900184958] [2022-11-20 20:04:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:06,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:06,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:06,484 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:06,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 20:04:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:06,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:06,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:06,738 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:06,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:06,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:06,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:06,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900184958] [2022-11-20 20:04:06,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900184958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:06,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:06,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682060280] [2022-11-20 20:04:06,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:06,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:06,932 INFO L87 Difference]: Start difference. First operand 1265 states and 4639 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) [2022-11-20 20:04:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:07,092 INFO L93 Difference]: Finished difference Result 1355 states and 5068 transitions. [2022-11-20 20:04:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:07,092 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 [2022-11-20 20:04:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:07,096 INFO L225 Difference]: With dead ends: 1355 [2022-11-20 20:04:07,096 INFO L226 Difference]: Without dead ends: 1355 [2022-11-20 20:04:07,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:07,097 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:07,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 20:04:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-11-20 20:04:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1355. [2022-11-20 20:04:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1333 states have (on average 3.8019504876219057) internal successors, (5068), 1354 states have internal predecessors, (5068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 5068 transitions. [2022-11-20 20:04:07,150 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 5068 transitions. Word has length 8 [2022-11-20 20:04:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:07,150 INFO L495 AbstractCegarLoop]: Abstraction has 1355 states and 5068 transitions. [2022-11-20 20:04:07,151 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) [2022-11-20 20:04:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 5068 transitions. [2022-11-20 20:04:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:04:07,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:07,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:07,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:07,363 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1971552420, now seen corresponding path program 1 times [2022-11-20 20:04:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358347722] [2022-11-20 20:04:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:07,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:07,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:07,365 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:07,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 20:04:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:04:07,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:07,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:07,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:07,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358347722] [2022-11-20 20:04:07,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358347722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:07,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:07,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:04:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666429773] [2022-11-20 20:04:07,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:07,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:04:07,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:04:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:04:07,497 INFO L87 Difference]: Start difference. First operand 1355 states and 5068 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:07,637 INFO L93 Difference]: Finished difference Result 1008 states and 3569 transitions. [2022-11-20 20:04:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:04:07,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 [2022-11-20 20:04:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:07,641 INFO L225 Difference]: With dead ends: 1008 [2022-11-20 20:04:07,641 INFO L226 Difference]: Without dead ends: 1008 [2022-11-20 20:04:07,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:04:07,641 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:07,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:04:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-11-20 20:04:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1008. [2022-11-20 20:04:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 994 states have (on average 3.590543259557344) internal successors, (3569), 1007 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 3569 transitions. [2022-11-20 20:04:07,668 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 3569 transitions. Word has length 8 [2022-11-20 20:04:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:07,668 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 3569 transitions. [2022-11-20 20:04:07,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 3569 transitions. [2022-11-20 20:04:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:04:07,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:07,669 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:07,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:07,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:07,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1971553336, now seen corresponding path program 2 times [2022-11-20 20:04:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:07,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850775475] [2022-11-20 20:04:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:07,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:07,883 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:07,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 20:04:08,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:04:08,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:08,156 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:08,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:08,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:08,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:08,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850775475] [2022-11-20 20:04:08,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850775475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:08,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:08,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819446370] [2022-11-20 20:04:08,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:08,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:08,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:08,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:08,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:08,336 INFO L87 Difference]: Start difference. First operand 1008 states and 3569 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) [2022-11-20 20:04:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:08,500 INFO L93 Difference]: Finished difference Result 1010 states and 3578 transitions. [2022-11-20 20:04:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:08,501 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 [2022-11-20 20:04:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:08,503 INFO L225 Difference]: With dead ends: 1010 [2022-11-20 20:04:08,503 INFO L226 Difference]: Without dead ends: 1010 [2022-11-20 20:04:08,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:08,504 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:08,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 20:04:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-11-20 20:04:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1010. [2022-11-20 20:04:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 996 states have (on average 3.5923694779116464) internal successors, (3578), 1009 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3578 transitions. [2022-11-20 20:04:08,529 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3578 transitions. Word has length 8 [2022-11-20 20:04:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:08,530 INFO L495 AbstractCegarLoop]: Abstraction has 1010 states and 3578 transitions. [2022-11-20 20:04:08,530 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) [2022-11-20 20:04:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3578 transitions. [2022-11-20 20:04:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:08,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:08,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:08,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:08,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:08,742 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1756656846, now seen corresponding path program 1 times [2022-11-20 20:04:08,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:08,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832733873] [2022-11-20 20:04:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:08,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:08,745 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:08,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 20:04:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:08,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:09,010 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:09,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:09,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:09,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832733873] [2022-11-20 20:04:09,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832733873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:09,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:09,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393980730] [2022-11-20 20:04:09,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:09,219 INFO L87 Difference]: Start difference. First operand 1010 states and 3578 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) [2022-11-20 20:04:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:09,376 INFO L93 Difference]: Finished difference Result 1011 states and 3580 transitions. [2022-11-20 20:04:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:09,377 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 [2022-11-20 20:04:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:09,379 INFO L225 Difference]: With dead ends: 1011 [2022-11-20 20:04:09,379 INFO L226 Difference]: Without dead ends: 1011 [2022-11-20 20:04:09,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:09,380 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:09,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:04:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-11-20 20:04:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1011. [2022-11-20 20:04:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 997 states have (on average 3.5907723169508525) internal successors, (3580), 1010 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3580 transitions. [2022-11-20 20:04:09,405 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3580 transitions. Word has length 9 [2022-11-20 20:04:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:09,405 INFO L495 AbstractCegarLoop]: Abstraction has 1011 states and 3580 transitions. [2022-11-20 20:04:09,405 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) [2022-11-20 20:04:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3580 transitions. [2022-11-20 20:04:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:09,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:09,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:09,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:09,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:09,617 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1753374876, now seen corresponding path program 2 times [2022-11-20 20:04:09,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:09,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250818533] [2022-11-20 20:04:09,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:09,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:09,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:09,619 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:09,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 20:04:09,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:04:09,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:09,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:09,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:09,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:10,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:10,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:10,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250818533] [2022-11-20 20:04:10,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250818533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:10,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:10,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:10,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510863640] [2022-11-20 20:04:10,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:10,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:10,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:10,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:10,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:10,092 INFO L87 Difference]: Start difference. First operand 1011 states and 3580 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) [2022-11-20 20:04:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:10,284 INFO L93 Difference]: Finished difference Result 1010 states and 3578 transitions. [2022-11-20 20:04:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:10,285 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 [2022-11-20 20:04:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:10,289 INFO L225 Difference]: With dead ends: 1010 [2022-11-20 20:04:10,289 INFO L226 Difference]: Without dead ends: 1010 [2022-11-20 20:04:10,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:10,289 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:10,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-20 20:04:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-11-20 20:04:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 1009. [2022-11-20 20:04:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 995 states have (on average 3.593969849246231) internal successors, (3576), 1008 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3576 transitions. [2022-11-20 20:04:10,324 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3576 transitions. Word has length 9 [2022-11-20 20:04:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:10,324 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 3576 transitions. [2022-11-20 20:04:10,324 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) [2022-11-20 20:04:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3576 transitions. [2022-11-20 20:04:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:10,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:10,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:10,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:10,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:10,536 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1753374163, now seen corresponding path program 1 times [2022-11-20 20:04:10,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:10,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917430105] [2022-11-20 20:04:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:10,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:10,538 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:10,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 20:04:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:10,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:04:10,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:10,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:10,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917430105] [2022-11-20 20:04:10,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917430105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:10,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:10,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:04:10,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970489377] [2022-11-20 20:04:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:10,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:04:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:04:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:04:10,770 INFO L87 Difference]: Start difference. First operand 1009 states and 3576 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:11,409 INFO L93 Difference]: Finished difference Result 1715 states and 5909 transitions. [2022-11-20 20:04:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:04:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:04:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:11,414 INFO L225 Difference]: With dead ends: 1715 [2022-11-20 20:04:11,414 INFO L226 Difference]: Without dead ends: 1715 [2022-11-20 20:04:11,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:04:11,415 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 160 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:11,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 16 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:04:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-20 20:04:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1173. [2022-11-20 20:04:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1159 states have (on average 3.7773943054357204) internal successors, (4378), 1172 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 4378 transitions. [2022-11-20 20:04:11,449 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 4378 transitions. Word has length 9 [2022-11-20 20:04:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:11,449 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 4378 transitions. [2022-11-20 20:04:11,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 4378 transitions. [2022-11-20 20:04:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:11,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:11,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:11,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:11,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:11,663 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1753203973, now seen corresponding path program 2 times [2022-11-20 20:04:11,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:11,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149883674] [2022-11-20 20:04:11,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:11,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:11,665 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:11,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 20:04:11,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:04:11,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:11,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:04:11,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:11,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:11,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:11,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149883674] [2022-11-20 20:04:11,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149883674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:11,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:11,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:04:11,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899005702] [2022-11-20 20:04:11,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:11,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:04:11,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:04:11,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:04:11,918 INFO L87 Difference]: Start difference. First operand 1173 states and 4378 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:12,628 INFO L93 Difference]: Finished difference Result 1864 states and 6906 transitions. [2022-11-20 20:04:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:04:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:04:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:12,633 INFO L225 Difference]: With dead ends: 1864 [2022-11-20 20:04:12,633 INFO L226 Difference]: Without dead ends: 1864 [2022-11-20 20:04:12,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:04:12,634 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:12,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 25 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:04:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-11-20 20:04:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1209. [2022-11-20 20:04:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1195 states have (on average 3.7757322175732217) internal successors, (4512), 1208 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 4512 transitions. [2022-11-20 20:04:12,683 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 4512 transitions. Word has length 9 [2022-11-20 20:04:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:12,683 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 4512 transitions. [2022-11-20 20:04:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 4512 transitions. [2022-11-20 20:04:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:12,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:12,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:12,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:12,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:12,897 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash -993923519, now seen corresponding path program 3 times [2022-11-20 20:04:12,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:12,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758397922] [2022-11-20 20:04:12,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:04:12,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:12,899 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:12,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 20:04:13,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:04:13,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:13,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:04:13,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:13,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:13,099 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:13,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758397922] [2022-11-20 20:04:13,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758397922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:13,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:13,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:04:13,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642073029] [2022-11-20 20:04:13,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:13,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:04:13,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:13,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:04:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:04:13,100 INFO L87 Difference]: Start difference. First operand 1209 states and 4512 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:13,802 INFO L93 Difference]: Finished difference Result 2356 states and 8354 transitions. [2022-11-20 20:04:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:04:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:04:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:13,808 INFO L225 Difference]: With dead ends: 2356 [2022-11-20 20:04:13,809 INFO L226 Difference]: Without dead ends: 2356 [2022-11-20 20:04:13,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:04:13,809 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:13,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 19 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:04:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-20 20:04:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1164. [2022-11-20 20:04:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1150 states have (on average 3.7417391304347825) internal successors, (4303), 1163 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 4303 transitions. [2022-11-20 20:04:13,840 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 4303 transitions. Word has length 9 [2022-11-20 20:04:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:13,840 INFO L495 AbstractCegarLoop]: Abstraction has 1164 states and 4303 transitions. [2022-11-20 20:04:13,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 4303 transitions. [2022-11-20 20:04:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:13,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:13,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:13,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:14,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:14,053 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash -993810276, now seen corresponding path program 1 times [2022-11-20 20:04:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40358220] [2022-11-20 20:04:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:14,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:14,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:14,058 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:14,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 20:04:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:14,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:04:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:14,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:14,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:14,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:14,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40358220] [2022-11-20 20:04:14,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40358220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:14,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:14,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:04:14,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132162334] [2022-11-20 20:04:14,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:14,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:14,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:14,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:14,498 INFO L87 Difference]: Start difference. First operand 1164 states and 4303 transitions. Second operand has 5 states, 5 states have (on average 1.8) 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) [2022-11-20 20:04:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:14,725 INFO L93 Difference]: Finished difference Result 1164 states and 4301 transitions. [2022-11-20 20:04:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) 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 [2022-11-20 20:04:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:14,728 INFO L225 Difference]: With dead ends: 1164 [2022-11-20 20:04:14,728 INFO L226 Difference]: Without dead ends: 1164 [2022-11-20 20:04:14,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:14,729 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:14,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-20 20:04:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-11-20 20:04:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1164. [2022-11-20 20:04:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1150 states have (on average 3.74) internal successors, (4301), 1163 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 4301 transitions. [2022-11-20 20:04:14,749 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 4301 transitions. Word has length 9 [2022-11-20 20:04:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:14,751 INFO L495 AbstractCegarLoop]: Abstraction has 1164 states and 4301 transitions. [2022-11-20 20:04:14,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) 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) [2022-11-20 20:04:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 4301 transitions. [2022-11-20 20:04:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:14,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:14,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:14,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:14,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:14,965 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash -988585633, now seen corresponding path program 1 times [2022-11-20 20:04:14,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:14,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805492284] [2022-11-20 20:04:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:14,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:14,967 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:14,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 20:04:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:04:15,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:15,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:15,204 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:15,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805492284] [2022-11-20 20:04:15,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805492284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:15,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:15,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617624782] [2022-11-20 20:04:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:15,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:15,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:15,206 INFO L87 Difference]: Start difference. First operand 1164 states and 4301 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) [2022-11-20 20:04:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:15,724 INFO L93 Difference]: Finished difference Result 1350 states and 4764 transitions. [2022-11-20 20:04:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:04:15,725 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 [2022-11-20 20:04:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:15,728 INFO L225 Difference]: With dead ends: 1350 [2022-11-20 20:04:15,728 INFO L226 Difference]: Without dead ends: 1350 [2022-11-20 20:04:15,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:04:15,729 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:15,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 11 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:04:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-20 20:04:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1261. [2022-11-20 20:04:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1247 states have (on average 3.6744186046511627) internal successors, (4582), 1260 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4582 transitions. [2022-11-20 20:04:15,754 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4582 transitions. Word has length 9 [2022-11-20 20:04:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:15,754 INFO L495 AbstractCegarLoop]: Abstraction has 1261 states and 4582 transitions. [2022-11-20 20:04:15,754 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) [2022-11-20 20:04:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4582 transitions. [2022-11-20 20:04:15,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:15,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:15,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:15,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:15,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:15,956 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:15,956 INFO L85 PathProgramCache]: Analyzing trace with hash -988586032, now seen corresponding path program 1 times [2022-11-20 20:04:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:15,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261632938] [2022-11-20 20:04:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:15,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:15,958 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:15,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 20:04:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:16,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:16,219 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:16,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:16,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:16,412 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261632938] [2022-11-20 20:04:16,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261632938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:16,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:16,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:16,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952248281] [2022-11-20 20:04:16,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:16,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:16,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:16,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:16,414 INFO L87 Difference]: Start difference. First operand 1261 states and 4582 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) [2022-11-20 20:04:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:16,554 INFO L93 Difference]: Finished difference Result 1267 states and 4613 transitions. [2022-11-20 20:04:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:16,555 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 [2022-11-20 20:04:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:16,558 INFO L225 Difference]: With dead ends: 1267 [2022-11-20 20:04:16,558 INFO L226 Difference]: Without dead ends: 1267 [2022-11-20 20:04:16,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:16,559 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:16,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:04:16,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-20 20:04:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1267. [2022-11-20 20:04:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1253 states have (on average 3.6815642458100557) internal successors, (4613), 1266 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4613 transitions. [2022-11-20 20:04:16,610 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4613 transitions. Word has length 9 [2022-11-20 20:04:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:16,611 INFO L495 AbstractCegarLoop]: Abstraction has 1267 states and 4613 transitions. [2022-11-20 20:04:16,611 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) [2022-11-20 20:04:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4613 transitions. [2022-11-20 20:04:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:04:16,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:16,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:16,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:16,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:16,812 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash -988613002, now seen corresponding path program 2 times [2022-11-20 20:04:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996100699] [2022-11-20 20:04:16,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:16,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:16,814 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:16,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 20:04:16,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:04:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:17,071 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:17,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:17,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:17,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:17,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996100699] [2022-11-20 20:04:17,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996100699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:17,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:17,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584597284] [2022-11-20 20:04:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:17,284 INFO L87 Difference]: Start difference. First operand 1267 states and 4613 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) [2022-11-20 20:04:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:17,455 INFO L93 Difference]: Finished difference Result 1265 states and 4600 transitions. [2022-11-20 20:04:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:17,455 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 [2022-11-20 20:04:17,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:17,460 INFO L225 Difference]: With dead ends: 1265 [2022-11-20 20:04:17,460 INFO L226 Difference]: Without dead ends: 1265 [2022-11-20 20:04:17,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:17,461 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:17,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-20 20:04:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-11-20 20:04:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1259. [2022-11-20 20:04:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1245 states have (on average 3.669879518072289) internal successors, (4569), 1258 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4569 transitions. [2022-11-20 20:04:17,490 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4569 transitions. Word has length 9 [2022-11-20 20:04:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:17,490 INFO L495 AbstractCegarLoop]: Abstraction has 1259 states and 4569 transitions. [2022-11-20 20:04:17,491 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) [2022-11-20 20:04:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4569 transitions. [2022-11-20 20:04:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:17,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:17,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:17,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:17,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:17,703 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1726375359, now seen corresponding path program 1 times [2022-11-20 20:04:17,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:17,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770487242] [2022-11-20 20:04:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:17,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:17,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:17,706 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:17,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 20:04:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:04:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:18,015 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:18,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:18,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:18,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770487242] [2022-11-20 20:04:18,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770487242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1592737583] [2022-11-20 20:04:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:18,892 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:04:18,897 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:04:18,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-20 20:04:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:19,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:04:19,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:19,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:19,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1592737583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620684084] [2022-11-20 20:04:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:19,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:04:19,887 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:04:19,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-20 20:04:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:04:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:20,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:20,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620684084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:20,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:04:20,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:04:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100614444] [2022-11-20 20:04:20,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:04:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:04:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:04:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:04:20,203 INFO L87 Difference]: Start difference. First operand 1259 states and 4569 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2022-11-20 20:04:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:22,286 INFO L93 Difference]: Finished difference Result 1269 states and 4605 transitions. [2022-11-20 20:04:22,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:04:22,287 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 10 [2022-11-20 20:04:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:22,301 INFO L225 Difference]: With dead ends: 1269 [2022-11-20 20:04:22,301 INFO L226 Difference]: Without dead ends: 1269 [2022-11-20 20:04:22,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:04:22,302 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:22,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 72 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 280 Invalid, 0 Unknown, 91 Unchecked, 1.1s Time] [2022-11-20 20:04:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-11-20 20:04:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1265. [2022-11-20 20:04:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1251 states have (on average 3.6698641087130297) internal successors, (4591), 1264 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4591 transitions. [2022-11-20 20:04:22,320 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4591 transitions. Word has length 10 [2022-11-20 20:04:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:22,320 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 4591 transitions. [2022-11-20 20:04:22,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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) [2022-11-20 20:04:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4591 transitions. [2022-11-20 20:04:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:22,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:22,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:22,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-20 20:04:22,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:22,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-20 20:04:22,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:22,922 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:22,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1721150716, now seen corresponding path program 1 times [2022-11-20 20:04:22,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:22,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016683277] [2022-11-20 20:04:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:22,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:22,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:22,924 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:22,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 20:04:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:04:23,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:23,214 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:23,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:23,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:24,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:24,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016683277] [2022-11-20 20:04:24,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016683277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:24,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672529675] [2022-11-20 20:04:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:24,389 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:24,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:04:24,390 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:04:24,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-20 20:04:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:24,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:04:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:24,777 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:24,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:25,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:25,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672529675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:25,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942969164] [2022-11-20 20:04:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:25,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:25,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:04:25,388 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:04:25,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-20 20:04:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:25,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:04:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:25,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:25,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:25,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:26,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942969164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:26,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:04:26,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-20 20:04:26,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807062447] [2022-11-20 20:04:26,179 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:04:26,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:04:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:04:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:04:26,180 INFO L87 Difference]: Start difference. First operand 1265 states and 4591 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:29,963 INFO L93 Difference]: Finished difference Result 2640 states and 9665 transitions. [2022-11-20 20:04:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:04:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:04:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:29,970 INFO L225 Difference]: With dead ends: 2640 [2022-11-20 20:04:29,970 INFO L226 Difference]: Without dead ends: 2640 [2022-11-20 20:04:29,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:04:29,971 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 339 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:29,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 52 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 384 Invalid, 0 Unknown, 154 Unchecked, 1.8s Time] [2022-11-20 20:04:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-11-20 20:04:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1796. [2022-11-20 20:04:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1782 states have (on average 3.7682379349046013) internal successors, (6715), 1795 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6715 transitions. [2022-11-20 20:04:30,009 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6715 transitions. Word has length 10 [2022-11-20 20:04:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:30,009 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 6715 transitions. [2022-11-20 20:04:30,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6715 transitions. [2022-11-20 20:04:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:30,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:30,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:30,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:30,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:30,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-20 20:04:30,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:30,615 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:30,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1378215511, now seen corresponding path program 1 times [2022-11-20 20:04:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:30,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333555302] [2022-11-20 20:04:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:30,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:30,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:30,617 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:30,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 20:04:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:30,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:30,893 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:30,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:31,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:31,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333555302] [2022-11-20 20:04:31,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333555302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:31,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:31,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:31,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653848281] [2022-11-20 20:04:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:31,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:31,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:31,145 INFO L87 Difference]: Start difference. First operand 1796 states and 6715 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) [2022-11-20 20:04:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:31,343 INFO L93 Difference]: Finished difference Result 1799 states and 6722 transitions. [2022-11-20 20:04:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:31,343 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 10 [2022-11-20 20:04:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:31,350 INFO L225 Difference]: With dead ends: 1799 [2022-11-20 20:04:31,350 INFO L226 Difference]: Without dead ends: 1799 [2022-11-20 20:04:31,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:31,351 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:31,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-20 20:04:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-11-20 20:04:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1798. [2022-11-20 20:04:31,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1784 states have (on average 3.7662556053811658) internal successors, (6719), 1797 states have internal predecessors, (6719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6719 transitions. [2022-11-20 20:04:31,390 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6719 transitions. Word has length 10 [2022-11-20 20:04:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:31,390 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 6719 transitions. [2022-11-20 20:04:31,390 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) [2022-11-20 20:04:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6719 transitions. [2022-11-20 20:04:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:31,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:31,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:31,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 20:04:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:31,593 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1378381051, now seen corresponding path program 2 times [2022-11-20 20:04:31,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:31,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620957698] [2022-11-20 20:04:31,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:31,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:31,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:31,595 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 20:04:31,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:04:31,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:31,868 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:31,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:32,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:32,131 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620957698] [2022-11-20 20:04:32,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620957698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:32,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:32,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103143633] [2022-11-20 20:04:32,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:32,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:32,132 INFO L87 Difference]: Start difference. First operand 1798 states and 6719 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) [2022-11-20 20:04:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:32,290 INFO L93 Difference]: Finished difference Result 1799 states and 6721 transitions. [2022-11-20 20:04:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:32,291 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 10 [2022-11-20 20:04:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:32,295 INFO L225 Difference]: With dead ends: 1799 [2022-11-20 20:04:32,295 INFO L226 Difference]: Without dead ends: 1799 [2022-11-20 20:04:32,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:32,299 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:32,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:04:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-11-20 20:04:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1798. [2022-11-20 20:04:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1784 states have (on average 3.7662556053811658) internal successors, (6719), 1797 states have internal predecessors, (6719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6719 transitions. [2022-11-20 20:04:32,330 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6719 transitions. Word has length 10 [2022-11-20 20:04:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:32,330 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 6719 transitions. [2022-11-20 20:04:32,331 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) [2022-11-20 20:04:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6719 transitions. [2022-11-20 20:04:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:32,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:32,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:32,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:32,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:32,532 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1479956581, now seen corresponding path program 3 times [2022-11-20 20:04:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:32,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544370248] [2022-11-20 20:04:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:04:32,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:32,534 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:32,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 20:04:32,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:04:32,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:32,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:32,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:32,809 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:32,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:33,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:33,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:33,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544370248] [2022-11-20 20:04:33,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544370248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:33,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:33,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:33,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809005312] [2022-11-20 20:04:33,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:33,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:33,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:33,054 INFO L87 Difference]: Start difference. First operand 1798 states and 6719 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) [2022-11-20 20:04:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:33,242 INFO L93 Difference]: Finished difference Result 1799 states and 6721 transitions. [2022-11-20 20:04:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:33,243 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 10 [2022-11-20 20:04:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:33,247 INFO L225 Difference]: With dead ends: 1799 [2022-11-20 20:04:33,247 INFO L226 Difference]: Without dead ends: 1799 [2022-11-20 20:04:33,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:33,248 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:33,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-20 20:04:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-11-20 20:04:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1797. [2022-11-20 20:04:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1783 states have (on average 3.7672462142456533) internal successors, (6717), 1796 states have internal predecessors, (6717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 6717 transitions. [2022-11-20 20:04:33,289 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 6717 transitions. Word has length 10 [2022-11-20 20:04:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:33,290 INFO L495 AbstractCegarLoop]: Abstraction has 1797 states and 6717 transitions. [2022-11-20 20:04:33,290 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) [2022-11-20 20:04:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 6717 transitions. [2022-11-20 20:04:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:33,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:33,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:33,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:33,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:33,503 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1485105061, now seen corresponding path program 4 times [2022-11-20 20:04:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:33,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101297106] [2022-11-20 20:04:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:04:33,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:33,505 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:33,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 20:04:33,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:04:33,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:33,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:33,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:33,787 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:33,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:34,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:34,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:34,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101297106] [2022-11-20 20:04:34,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101297106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:34,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:34,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:34,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286937899] [2022-11-20 20:04:34,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:34,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:34,038 INFO L87 Difference]: Start difference. First operand 1797 states and 6717 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) [2022-11-20 20:04:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:34,247 INFO L93 Difference]: Finished difference Result 1799 states and 6720 transitions. [2022-11-20 20:04:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:34,248 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 10 [2022-11-20 20:04:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:34,254 INFO L225 Difference]: With dead ends: 1799 [2022-11-20 20:04:34,254 INFO L226 Difference]: Without dead ends: 1799 [2022-11-20 20:04:34,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:34,255 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:34,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 20:04:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-11-20 20:04:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1796. [2022-11-20 20:04:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1782 states have (on average 3.7676767676767677) internal successors, (6714), 1795 states have internal predecessors, (6714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6714 transitions. [2022-11-20 20:04:34,298 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6714 transitions. Word has length 10 [2022-11-20 20:04:34,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:34,299 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 6714 transitions. [2022-11-20 20:04:34,299 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) [2022-11-20 20:04:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6714 transitions. [2022-11-20 20:04:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:34,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:34,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:34,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:34,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:34,512 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash -741240005, now seen corresponding path program 1 times [2022-11-20 20:04:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:34,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50948487] [2022-11-20 20:04:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:34,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:34,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:34,514 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:34,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 20:04:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:34,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:04:34,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:34,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:34,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:34,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:34,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50948487] [2022-11-20 20:04:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50948487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:34,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:34,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:04:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020462019] [2022-11-20 20:04:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:34,983 INFO L87 Difference]: Start difference. First operand 1796 states and 6714 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2022-11-20 20:04:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:35,196 INFO L93 Difference]: Finished difference Result 1804 states and 6725 transitions. [2022-11-20 20:04:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:35,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:04:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:35,201 INFO L225 Difference]: With dead ends: 1804 [2022-11-20 20:04:35,201 INFO L226 Difference]: Without dead ends: 1804 [2022-11-20 20:04:35,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:35,202 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:35,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-11-20 20:04:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2022-11-20 20:04:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1804. [2022-11-20 20:04:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1790 states have (on average 3.7569832402234637) internal successors, (6725), 1803 states have internal predecessors, (6725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6725 transitions. [2022-11-20 20:04:35,243 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6725 transitions. Word has length 10 [2022-11-20 20:04:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:35,244 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 6725 transitions. [2022-11-20 20:04:35,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2022-11-20 20:04:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6725 transitions. [2022-11-20 20:04:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:35,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:35,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:35,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:35,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:35,457 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash -581386056, now seen corresponding path program 1 times [2022-11-20 20:04:35,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:35,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986777601] [2022-11-20 20:04:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:35,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:35,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:35,459 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:35,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 20:04:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:35,738 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:35,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:35,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:35,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986777601] [2022-11-20 20:04:35,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986777601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:35,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:35,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:35,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073045045] [2022-11-20 20:04:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:35,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:35,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:35,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:35,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:35,955 INFO L87 Difference]: Start difference. First operand 1804 states and 6725 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) [2022-11-20 20:04:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:36,114 INFO L93 Difference]: Finished difference Result 1822 states and 6829 transitions. [2022-11-20 20:04:36,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:36,115 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 10 [2022-11-20 20:04:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:36,121 INFO L225 Difference]: With dead ends: 1822 [2022-11-20 20:04:36,121 INFO L226 Difference]: Without dead ends: 1822 [2022-11-20 20:04:36,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:36,122 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:36,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 20:04:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-11-20 20:04:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1812. [2022-11-20 20:04:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1798 states have (on average 3.767519466073415) internal successors, (6774), 1811 states have internal predecessors, (6774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6774 transitions. [2022-11-20 20:04:36,153 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6774 transitions. Word has length 10 [2022-11-20 20:04:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:36,153 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 6774 transitions. [2022-11-20 20:04:36,153 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) [2022-11-20 20:04:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6774 transitions. [2022-11-20 20:04:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:36,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:36,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:36,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:36,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:36,366 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:36,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash -581277463, now seen corresponding path program 1 times [2022-11-20 20:04:36,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:36,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462366364] [2022-11-20 20:04:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:36,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:36,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:36,368 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:36,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 20:04:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:36,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:36,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:36,667 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:36,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:36,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:36,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:36,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462366364] [2022-11-20 20:04:36,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462366364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:36,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:36,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766589637] [2022-11-20 20:04:36,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:36,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:36,876 INFO L87 Difference]: Start difference. First operand 1812 states and 6774 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) [2022-11-20 20:04:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:37,056 INFO L93 Difference]: Finished difference Result 1828 states and 6848 transitions. [2022-11-20 20:04:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:37,057 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 10 [2022-11-20 20:04:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:37,062 INFO L225 Difference]: With dead ends: 1828 [2022-11-20 20:04:37,062 INFO L226 Difference]: Without dead ends: 1828 [2022-11-20 20:04:37,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:37,062 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:37,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 20:04:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-11-20 20:04:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1820. [2022-11-20 20:04:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1806 states have (on average 3.7691029900332227) internal successors, (6807), 1819 states have internal predecessors, (6807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6807 transitions. [2022-11-20 20:04:37,093 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6807 transitions. Word has length 10 [2022-11-20 20:04:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:37,094 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 6807 transitions. [2022-11-20 20:04:37,094 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) [2022-11-20 20:04:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6807 transitions. [2022-11-20 20:04:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:37,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:37,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:37,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:37,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:37,295 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:37,295 INFO L85 PathProgramCache]: Analyzing trace with hash -581398146, now seen corresponding path program 2 times [2022-11-20 20:04:37,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:37,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832529149] [2022-11-20 20:04:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:37,297 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:37,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 20:04:37,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:04:37,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:37,591 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:37,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:37,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:37,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:37,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832529149] [2022-11-20 20:04:37,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832529149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:37,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:37,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:37,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323995670] [2022-11-20 20:04:37,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:37,839 INFO L87 Difference]: Start difference. First operand 1820 states and 6807 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) [2022-11-20 20:04:38,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:38,038 INFO L93 Difference]: Finished difference Result 1836 states and 6897 transitions. [2022-11-20 20:04:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:38,039 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 10 [2022-11-20 20:04:38,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:38,045 INFO L225 Difference]: With dead ends: 1836 [2022-11-20 20:04:38,045 INFO L226 Difference]: Without dead ends: 1836 [2022-11-20 20:04:38,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:38,046 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:38,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 20:04:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2022-11-20 20:04:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1828. [2022-11-20 20:04:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1814 states have (on average 3.775082690187431) internal successors, (6848), 1827 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 6848 transitions. [2022-11-20 20:04:38,089 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 6848 transitions. Word has length 10 [2022-11-20 20:04:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:38,089 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 6848 transitions. [2022-11-20 20:04:38,090 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) [2022-11-20 20:04:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 6848 transitions. [2022-11-20 20:04:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:38,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:38,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:38,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:38,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:38,303 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:38,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash -581394643, now seen corresponding path program 2 times [2022-11-20 20:04:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:38,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175240172] [2022-11-20 20:04:38,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:38,304 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:38,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 20:04:38,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:04:38,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:38,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:38,602 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:38,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:38,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:38,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:38,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175240172] [2022-11-20 20:04:38,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175240172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:38,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:38,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:38,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565490555] [2022-11-20 20:04:38,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:38,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:38,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:38,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:38,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:38,829 INFO L87 Difference]: Start difference. First operand 1828 states and 6848 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) [2022-11-20 20:04:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:39,001 INFO L93 Difference]: Finished difference Result 1836 states and 6881 transitions. [2022-11-20 20:04:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:39,001 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 10 [2022-11-20 20:04:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:39,006 INFO L225 Difference]: With dead ends: 1836 [2022-11-20 20:04:39,006 INFO L226 Difference]: Without dead ends: 1836 [2022-11-20 20:04:39,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:39,006 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:39,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:04:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2022-11-20 20:04:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1828. [2022-11-20 20:04:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1814 states have (on average 3.775082690187431) internal successors, (6848), 1827 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 6848 transitions. [2022-11-20 20:04:39,051 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 6848 transitions. Word has length 10 [2022-11-20 20:04:39,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:39,052 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 6848 transitions. [2022-11-20 20:04:39,052 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) [2022-11-20 20:04:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 6848 transitions. [2022-11-20 20:04:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:39,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:39,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:39,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-20 20:04:39,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:39,253 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash -582234216, now seen corresponding path program 3 times [2022-11-20 20:04:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:39,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369386281] [2022-11-20 20:04:39,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:04:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:39,255 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:39,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 20:04:39,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:04:39,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:39,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:39,540 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:39,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:39,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:39,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:39,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369386281] [2022-11-20 20:04:39,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369386281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:39,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:39,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31450070] [2022-11-20 20:04:39,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:39,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:39,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:39,758 INFO L87 Difference]: Start difference. First operand 1828 states and 6848 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) [2022-11-20 20:04:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:39,947 INFO L93 Difference]: Finished difference Result 1826 states and 6833 transitions. [2022-11-20 20:04:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:39,948 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 10 [2022-11-20 20:04:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:39,952 INFO L225 Difference]: With dead ends: 1826 [2022-11-20 20:04:39,952 INFO L226 Difference]: Without dead ends: 1826 [2022-11-20 20:04:39,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:39,953 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:39,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-20 20:04:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-11-20 20:04:39,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1818. [2022-11-20 20:04:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1804 states have (on average 3.7605321507760534) internal successors, (6784), 1817 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6784 transitions. [2022-11-20 20:04:39,996 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6784 transitions. Word has length 10 [2022-11-20 20:04:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:39,996 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 6784 transitions. [2022-11-20 20:04:39,996 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) [2022-11-20 20:04:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6784 transitions. [2022-11-20 20:04:39,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:39,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:39,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:40,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:04:40,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:40,198 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:40,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash -582230713, now seen corresponding path program 3 times [2022-11-20 20:04:40,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:40,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040686796] [2022-11-20 20:04:40,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:04:40,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:40,200 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:40,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 20:04:40,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:04:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:04:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:40,485 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:40,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:40,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:40,743 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:40,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040686796] [2022-11-20 20:04:40,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040686796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:40,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:40,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:04:40,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005060766] [2022-11-20 20:04:40,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:40,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:40,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:40,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:40,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:40,744 INFO L87 Difference]: Start difference. First operand 1818 states and 6784 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) [2022-11-20 20:04:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:40,917 INFO L93 Difference]: Finished difference Result 1816 states and 6771 transitions. [2022-11-20 20:04:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:40,918 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 10 [2022-11-20 20:04:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:40,922 INFO L225 Difference]: With dead ends: 1816 [2022-11-20 20:04:40,922 INFO L226 Difference]: Without dead ends: 1816 [2022-11-20 20:04:40,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:40,923 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:40,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 20:04:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2022-11-20 20:04:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1800. [2022-11-20 20:04:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1786 states have (on average 3.749720044792833) internal successors, (6697), 1799 states have internal predecessors, (6697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 6697 transitions. [2022-11-20 20:04:40,952 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 6697 transitions. Word has length 10 [2022-11-20 20:04:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:40,952 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 6697 transitions. [2022-11-20 20:04:40,952 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) [2022-11-20 20:04:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 6697 transitions. [2022-11-20 20:04:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:04:40,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:40,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:04:40,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:41,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:41,165 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash -582156065, now seen corresponding path program 2 times [2022-11-20 20:04:41,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:41,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99249762] [2022-11-20 20:04:41,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:41,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:41,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:41,167 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:41,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 20:04:41,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:04:41,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:41,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:04:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:41,491 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:41,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:04:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:41,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:04:41,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99249762] [2022-11-20 20:04:41,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99249762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:04:41,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:04:41,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:04:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260244867] [2022-11-20 20:04:41,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:04:41,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:04:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:04:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:04:41,658 INFO L87 Difference]: Start difference. First operand 1800 states and 6697 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2022-11-20 20:04:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:41,857 INFO L93 Difference]: Finished difference Result 1792 states and 6671 transitions. [2022-11-20 20:04:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:04:41,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:04:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:41,862 INFO L225 Difference]: With dead ends: 1792 [2022-11-20 20:04:41,862 INFO L226 Difference]: Without dead ends: 1792 [2022-11-20 20:04:41,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:04:41,862 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:41,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 20:04:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2022-11-20 20:04:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1792. [2022-11-20 20:04:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1778 states have (on average 3.751968503937008) internal successors, (6671), 1791 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:04:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6671 transitions. [2022-11-20 20:04:41,890 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6671 transitions. Word has length 10 [2022-11-20 20:04:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:41,890 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 6671 transitions. [2022-11-20 20:04:41,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2022-11-20 20:04:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6671 transitions. [2022-11-20 20:04:41,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:04:41,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:41,892 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-20 20:04:41,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:42,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:42,104 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:04:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash 592903795, now seen corresponding path program 2 times [2022-11-20 20:04:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:04:42,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332765153] [2022-11-20 20:04:42,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:42,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:04:42,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:04:42,106 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:04:42,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 20:04:42,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:04:42,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:04:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:42,473 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:42,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:42,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:04:44,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:04:44,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332765153] [2022-11-20 20:04:44,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332765153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:44,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830816523] [2022-11-20 20:04:44,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:44,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:04:44,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:04:44,509 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:04:44,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-20 20:04:44,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:04:44,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:44,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:04:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:45,102 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:04:45,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:04:45,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 20:04:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:45,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:46,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830816523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:46,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689629047] [2022-11-20 20:04:46,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:04:46,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:46,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:04:46,841 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:04:46,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-20 20:04:47,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:04:47,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:47,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:04:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:47,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:04:47,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689629047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:04:47,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:04:47,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 36 [2022-11-20 20:04:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801975603] [2022-11-20 20:04:47,913 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:04:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 20:04:47,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:04:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 20:04:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:04:47,914 INFO L87 Difference]: Start difference. First operand 1792 states and 6671 transitions. Second operand has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:21,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:21,343 INFO L93 Difference]: Finished difference Result 5321 states and 19293 transitions. [2022-11-20 20:05:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 20:05:21,345 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:05:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:21,358 INFO L225 Difference]: With dead ends: 5321 [2022-11-20 20:05:21,359 INFO L226 Difference]: Without dead ends: 5321 [2022-11-20 20:05:21,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=683, Invalid=3873, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 20:05:21,359 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 803 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 4304 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 5703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1367 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:21,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 798 Invalid, 5703 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 4304 Invalid, 0 Unknown, 1367 Unchecked, 19.7s Time] [2022-11-20 20:05:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2022-11-20 20:05:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 2285. [2022-11-20 20:05:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2271 states have (on average 3.8401585204755615) internal successors, (8721), 2284 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 8721 transitions. [2022-11-20 20:05:21,492 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 8721 transitions. Word has length 11 [2022-11-20 20:05:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:21,492 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 8721 transitions. [2022-11-20 20:05:21,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 8721 transitions. [2022-11-20 20:05:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:21,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:21,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:21,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 20:05:21,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-20 20:05:21,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:22,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:05:22,108 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1975921098, now seen corresponding path program 1 times [2022-11-20 20:05:22,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:22,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353846437] [2022-11-20 20:05:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:22,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:22,110 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:22,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 20:05:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:05:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:22,437 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:22,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:05:22,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:05:23,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353846437] [2022-11-20 20:05:23,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353846437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:23,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [679767526] [2022-11-20 20:05:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:23,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:05:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:05:23,461 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:05:23,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-20 20:05:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:05:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:24,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:24,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [679767526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:24,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004573859] [2022-11-20 20:05:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:24,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:05:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:05:24,578 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:05:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-20 20:05:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:05:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:24,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:24,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004573859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:24,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:05:24,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:05:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066904997] [2022-11-20 20:05:24,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:05:24,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:05:24,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:24,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:05:24,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:05:24,959 INFO L87 Difference]: Start difference. First operand 2285 states and 8721 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:27,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:27,649 INFO L93 Difference]: Finished difference Result 2825 states and 10879 transitions. [2022-11-20 20:05:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 20:05:27,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:05:27,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:27,657 INFO L225 Difference]: With dead ends: 2825 [2022-11-20 20:05:27,658 INFO L226 Difference]: Without dead ends: 2825 [2022-11-20 20:05:27,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 20:05:27,658 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 129 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:27,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 71 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 226 Invalid, 0 Unknown, 342 Unchecked, 1.0s Time] [2022-11-20 20:05:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2022-11-20 20:05:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2723. [2022-11-20 20:05:27,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 2709 states have (on average 3.8785529715762275) internal successors, (10507), 2722 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 10507 transitions. [2022-11-20 20:05:27,720 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 10507 transitions. Word has length 11 [2022-11-20 20:05:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:27,720 INFO L495 AbstractCegarLoop]: Abstraction has 2723 states and 10507 transitions. [2022-11-20 20:05:27,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 10507 transitions. [2022-11-20 20:05:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:27,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:27,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:27,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-20 20:05:27,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-20 20:05:28,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-20 20:05:28,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:05:28,334 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1978025688, now seen corresponding path program 2 times [2022-11-20 20:05:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:28,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500420588] [2022-11-20 20:05:28,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:05:28,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:28,336 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:28,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 20:05:28,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:05:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:05:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:28,676 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:28,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:05:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:05:28,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:05:29,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500420588] [2022-11-20 20:05:29,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500420588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [94979737] [2022-11-20 20:05:29,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:05:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:05:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:05:29,505 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:05:29,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-20 20:05:29,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:05:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:29,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:05:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:30,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:30,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [94979737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159039989] [2022-11-20 20:05:30,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:05:30,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:05:30,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:05:30,557 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:05:30,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-20 20:05:30,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:05:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:30,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:05:30,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:31,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:31,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159039989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:31,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:05:31,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:05:31,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343951143] [2022-11-20 20:05:31,312 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:05:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:05:31,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:05:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:05:31,314 INFO L87 Difference]: Start difference. First operand 2723 states and 10507 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:36,306 INFO L93 Difference]: Finished difference Result 2871 states and 11109 transitions. [2022-11-20 20:05:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:05:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:05:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:36,314 INFO L225 Difference]: With dead ends: 2871 [2022-11-20 20:05:36,315 INFO L226 Difference]: Without dead ends: 2871 [2022-11-20 20:05:36,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:05:36,315 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:36,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 71 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 313 Invalid, 0 Unknown, 52 Unchecked, 1.3s Time] [2022-11-20 20:05:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2022-11-20 20:05:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2807. [2022-11-20 20:05:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2793 states have (on average 3.8986752595775154) internal successors, (10889), 2806 states have internal predecessors, (10889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 10889 transitions. [2022-11-20 20:05:36,391 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 10889 transitions. Word has length 11 [2022-11-20 20:05:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:36,391 INFO L495 AbstractCegarLoop]: Abstraction has 2807 states and 10889 transitions. [2022-11-20 20:05:36,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 10889 transitions. [2022-11-20 20:05:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:36,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:36,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:36,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:36,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:36,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-11-20 20:05:37,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:05:37,008 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1816837158, now seen corresponding path program 3 times [2022-11-20 20:05:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:37,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747631899] [2022-11-20 20:05:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:05:37,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:37,010 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:37,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 20:05:37,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:05:37,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:37,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:05:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:37,362 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:37,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:05:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:05:37,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:05:38,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747631899] [2022-11-20 20:05:38,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747631899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:38,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [523439320] [2022-11-20 20:05:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:05:38,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:05:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:05:38,166 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:05:38,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-20 20:05:38,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:05:38,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:38,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:05:38,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:38,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:39,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [523439320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:39,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241402487] [2022-11-20 20:05:39,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:05:39,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:05:39,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:05:39,231 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:05:39,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-20 20:05:39,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:05:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:05:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:39,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:39,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241402487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:40,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:05:40,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:05:40,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117791860] [2022-11-20 20:05:40,000 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:05:40,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:05:40,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:05:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:05:40,001 INFO L87 Difference]: Start difference. First operand 2807 states and 10889 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:42,967 INFO L93 Difference]: Finished difference Result 2845 states and 11023 transitions. [2022-11-20 20:05:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:05:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:05:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:42,976 INFO L225 Difference]: With dead ends: 2845 [2022-11-20 20:05:42,976 INFO L226 Difference]: Without dead ends: 2845 [2022-11-20 20:05:42,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:05:42,977 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:42,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 72 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 0 Unknown, 21 Unchecked, 0.9s Time] [2022-11-20 20:05:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-11-20 20:05:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2813. [2022-11-20 20:05:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2813 states, 2799 states have (on average 3.896748838871025) internal successors, (10907), 2812 states have internal predecessors, (10907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 10907 transitions. [2022-11-20 20:05:43,048 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 10907 transitions. Word has length 11 [2022-11-20 20:05:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:43,048 INFO L495 AbstractCegarLoop]: Abstraction has 2813 states and 10907 transitions. [2022-11-20 20:05:43,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 10907 transitions. [2022-11-20 20:05:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:43,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:43,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:43,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-20 20:05:43,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-11-20 20:05:43,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-20 20:05:43,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:05:43,663 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:43,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash -224993849, now seen corresponding path program 1 times [2022-11-20 20:05:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:43,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337124981] [2022-11-20 20:05:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:43,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:43,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:43,665 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:43,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 20:05:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:44,044 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:44,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:44,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:44,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337124981] [2022-11-20 20:05:44,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337124981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:44,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:44,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289080678] [2022-11-20 20:05:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:44,315 INFO L87 Difference]: Start difference. First operand 2813 states and 10907 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) [2022-11-20 20:05:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:44,499 INFO L93 Difference]: Finished difference Result 2818 states and 10920 transitions. [2022-11-20 20:05:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:44,500 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 [2022-11-20 20:05:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:44,507 INFO L225 Difference]: With dead ends: 2818 [2022-11-20 20:05:44,507 INFO L226 Difference]: Without dead ends: 2818 [2022-11-20 20:05:44,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:44,507 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:44,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 20:05:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2022-11-20 20:05:44,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2816. [2022-11-20 20:05:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2802 states have (on average 3.8950749464668095) internal successors, (10914), 2815 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 10914 transitions. [2022-11-20 20:05:44,574 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 10914 transitions. Word has length 11 [2022-11-20 20:05:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:44,574 INFO L495 AbstractCegarLoop]: Abstraction has 2816 states and 10914 transitions. [2022-11-20 20:05:44,574 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) [2022-11-20 20:05:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 10914 transitions. [2022-11-20 20:05:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:44,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:44,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:44,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:44,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:44,788 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash -219835139, now seen corresponding path program 2 times [2022-11-20 20:05:44,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:44,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852162922] [2022-11-20 20:05:44,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:05:44,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:44,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:44,790 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:44,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 20:05:44,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:05:44,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:44,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:45,157 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:45,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:45,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:45,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:45,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852162922] [2022-11-20 20:05:45,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852162922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:45,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:45,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:45,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174762706] [2022-11-20 20:05:45,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:45,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:45,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:45,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:45,413 INFO L87 Difference]: Start difference. First operand 2816 states and 10914 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) [2022-11-20 20:05:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:45,581 INFO L93 Difference]: Finished difference Result 2828 states and 10970 transitions. [2022-11-20 20:05:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:45,582 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 [2022-11-20 20:05:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:45,589 INFO L225 Difference]: With dead ends: 2828 [2022-11-20 20:05:45,589 INFO L226 Difference]: Without dead ends: 2828 [2022-11-20 20:05:45,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:45,590 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:45,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-20 20:05:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-11-20 20:05:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2816. [2022-11-20 20:05:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2802 states have (on average 3.8950749464668095) internal successors, (10914), 2815 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 10914 transitions. [2022-11-20 20:05:45,646 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 10914 transitions. Word has length 11 [2022-11-20 20:05:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:45,646 INFO L495 AbstractCegarLoop]: Abstraction has 2816 states and 10914 transitions. [2022-11-20 20:05:45,646 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) [2022-11-20 20:05:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 10914 transitions. [2022-11-20 20:05:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:45,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:45,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:45,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-20 20:05:45,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:45,855 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash -219862109, now seen corresponding path program 3 times [2022-11-20 20:05:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:45,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608065051] [2022-11-20 20:05:45,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:05:45,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:45,857 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:45,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 20:05:46,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:05:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:46,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:46,192 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:46,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:46,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:46,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608065051] [2022-11-20 20:05:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608065051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:46,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:46,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:46,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99805110] [2022-11-20 20:05:46,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:46,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:46,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:46,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:46,445 INFO L87 Difference]: Start difference. First operand 2816 states and 10914 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) [2022-11-20 20:05:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:46,646 INFO L93 Difference]: Finished difference Result 2982 states and 11577 transitions. [2022-11-20 20:05:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:46,647 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 [2022-11-20 20:05:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:46,655 INFO L225 Difference]: With dead ends: 2982 [2022-11-20 20:05:46,655 INFO L226 Difference]: Without dead ends: 2982 [2022-11-20 20:05:46,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:46,656 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:46,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 11 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-11-20 20:05:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-11-20 20:05:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2868. [2022-11-20 20:05:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2854 states have (on average 3.898037841625788) internal successors, (11125), 2867 states have internal predecessors, (11125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 11125 transitions. [2022-11-20 20:05:46,787 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 11125 transitions. Word has length 11 [2022-11-20 20:05:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:46,788 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 11125 transitions. [2022-11-20 20:05:46,788 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) [2022-11-20 20:05:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 11125 transitions. [2022-11-20 20:05:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:46,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:46,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:46,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:47,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:47,001 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:47,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1365987975, now seen corresponding path program 4 times [2022-11-20 20:05:47,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:47,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294441665] [2022-11-20 20:05:47,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:05:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:47,004 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:47,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 20:05:47,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:05:47,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:47,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:47,331 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:47,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:47,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:47,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:47,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294441665] [2022-11-20 20:05:47,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294441665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:47,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:47,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:47,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525202155] [2022-11-20 20:05:47,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:47,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:47,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:47,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:47,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:47,621 INFO L87 Difference]: Start difference. First operand 2868 states and 11125 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) [2022-11-20 20:05:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:47,835 INFO L93 Difference]: Finished difference Result 2884 states and 11164 transitions. [2022-11-20 20:05:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:47,835 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 [2022-11-20 20:05:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:47,844 INFO L225 Difference]: With dead ends: 2884 [2022-11-20 20:05:47,844 INFO L226 Difference]: Without dead ends: 2884 [2022-11-20 20:05:47,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:47,844 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:47,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-20 20:05:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-11-20 20:05:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2868. [2022-11-20 20:05:47,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2854 states have (on average 3.898037841625788) internal successors, (11125), 2867 states have internal predecessors, (11125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 11125 transitions. [2022-11-20 20:05:47,933 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 11125 transitions. Word has length 11 [2022-11-20 20:05:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:47,933 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 11125 transitions. [2022-11-20 20:05:47,934 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) [2022-11-20 20:05:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 11125 transitions. [2022-11-20 20:05:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:47,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:47,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:47,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:48,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:48,149 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:48,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1205670855, now seen corresponding path program 5 times [2022-11-20 20:05:48,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:48,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184278120] [2022-11-20 20:05:48,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:05:48,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:48,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:48,151 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:48,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 20:05:48,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:05:48,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:48,469 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:48,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:05:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:48,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:48,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:48,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184278120] [2022-11-20 20:05:48,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184278120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:48,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:48,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:48,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580011654] [2022-11-20 20:05:48,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:48,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:48,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:48,776 INFO L87 Difference]: Start difference. First operand 2868 states and 11125 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) [2022-11-20 20:05:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:48,976 INFO L93 Difference]: Finished difference Result 2872 states and 11137 transitions. [2022-11-20 20:05:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:48,976 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 [2022-11-20 20:05:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:48,986 INFO L225 Difference]: With dead ends: 2872 [2022-11-20 20:05:48,986 INFO L226 Difference]: Without dead ends: 2872 [2022-11-20 20:05:48,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:48,987 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:48,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-20 20:05:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2022-11-20 20:05:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2868. [2022-11-20 20:05:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2854 states have (on average 3.898037841625788) internal successors, (11125), 2867 states have internal predecessors, (11125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 11125 transitions. [2022-11-20 20:05:49,053 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 11125 transitions. Word has length 11 [2022-11-20 20:05:49,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:49,053 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 11125 transitions. [2022-11-20 20:05:49,053 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) [2022-11-20 20:05:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 11125 transitions. [2022-11-20 20:05:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:49,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:49,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:49,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-20 20:05:49,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:49,263 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1206506925, now seen corresponding path program 6 times [2022-11-20 20:05:49,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:49,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331657946] [2022-11-20 20:05:49,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:05:49,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:49,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:49,265 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:49,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 20:05:49,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 20:05:49,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:49,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:49,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:49,623 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:49,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:49,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:49,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:49,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331657946] [2022-11-20 20:05:49,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331657946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:49,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:49,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354049330] [2022-11-20 20:05:49,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:49,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:49,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:49,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:49,918 INFO L87 Difference]: Start difference. First operand 2868 states and 11125 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) [2022-11-20 20:05:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:50,113 INFO L93 Difference]: Finished difference Result 2869 states and 11126 transitions. [2022-11-20 20:05:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:50,114 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 [2022-11-20 20:05:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:50,121 INFO L225 Difference]: With dead ends: 2869 [2022-11-20 20:05:50,122 INFO L226 Difference]: Without dead ends: 2869 [2022-11-20 20:05:50,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:50,122 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:50,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 20:05:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2022-11-20 20:05:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 2866. [2022-11-20 20:05:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2852 states have (on average 3.8986676016830293) internal successors, (11119), 2865 states have internal predecessors, (11119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 11119 transitions. [2022-11-20 20:05:50,171 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 11119 transitions. Word has length 11 [2022-11-20 20:05:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:50,171 INFO L495 AbstractCegarLoop]: Abstraction has 2866 states and 11119 transitions. [2022-11-20 20:05:50,171 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) [2022-11-20 20:05:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 11119 transitions. [2022-11-20 20:05:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:50,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:50,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:50,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-20 20:05:50,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:50,373 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1201815726, now seen corresponding path program 1 times [2022-11-20 20:05:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551768871] [2022-11-20 20:05:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:50,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:50,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:50,375 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:50,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 20:05:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:50,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:05:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:50,737 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:50,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:05:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:05:50,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:50,908 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:50,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551768871] [2022-11-20 20:05:50,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551768871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:50,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:50,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:05:50,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814105357] [2022-11-20 20:05:50,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:50,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:50,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:50,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:50,909 INFO L87 Difference]: Start difference. First operand 2866 states and 11119 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:05:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:51,151 INFO L93 Difference]: Finished difference Result 2869 states and 11127 transitions. [2022-11-20 20:05:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:51,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2022-11-20 20:05:51,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:51,158 INFO L225 Difference]: With dead ends: 2869 [2022-11-20 20:05:51,159 INFO L226 Difference]: Without dead ends: 2869 [2022-11-20 20:05:51,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:51,159 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:51,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-20 20:05:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2022-11-20 20:05:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 2869. [2022-11-20 20:05:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2869 states, 2855 states have (on average 3.8973730297723295) internal successors, (11127), 2868 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 11127 transitions. [2022-11-20 20:05:51,207 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 11127 transitions. Word has length 11 [2022-11-20 20:05:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:51,207 INFO L495 AbstractCegarLoop]: Abstraction has 2869 states and 11127 transitions. [2022-11-20 20:05:51,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:05:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 11127 transitions. [2022-11-20 20:05:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:51,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:51,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:51,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-20 20:05:51,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:51,409 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash -842980095, now seen corresponding path program 1 times [2022-11-20 20:05:51,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:51,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576273440] [2022-11-20 20:05:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:51,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:51,411 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:51,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 20:05:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:51,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:51,747 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:51,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:52,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:52,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576273440] [2022-11-20 20:05:52,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576273440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:52,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:52,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:52,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113902815] [2022-11-20 20:05:52,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:52,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:52,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:52,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:52,071 INFO L87 Difference]: Start difference. First operand 2869 states and 11127 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) [2022-11-20 20:05:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:52,227 INFO L93 Difference]: Finished difference Result 2915 states and 11388 transitions. [2022-11-20 20:05:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:52,227 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 [2022-11-20 20:05:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:52,235 INFO L225 Difference]: With dead ends: 2915 [2022-11-20 20:05:52,235 INFO L226 Difference]: Without dead ends: 2915 [2022-11-20 20:05:52,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:52,235 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:52,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 20:05:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2022-11-20 20:05:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2879. [2022-11-20 20:05:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2865 states have (on average 3.9022687609075044) internal successors, (11180), 2878 states have internal predecessors, (11180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 11180 transitions. [2022-11-20 20:05:52,283 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 11180 transitions. Word has length 11 [2022-11-20 20:05:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:52,283 INFO L495 AbstractCegarLoop]: Abstraction has 2879 states and 11180 transitions. [2022-11-20 20:05:52,284 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) [2022-11-20 20:05:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 11180 transitions. [2022-11-20 20:05:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:52,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:52,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:52,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-20 20:05:52,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:52,485 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash -843097275, now seen corresponding path program 2 times [2022-11-20 20:05:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584467980] [2022-11-20 20:05:52,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:05:52,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:52,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:52,487 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:52,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 20:05:52,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:05:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:52,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:52,812 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:52,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:53,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:53,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:53,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584467980] [2022-11-20 20:05:53,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584467980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:53,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:53,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:53,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846961146] [2022-11-20 20:05:53,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:53,116 INFO L87 Difference]: Start difference. First operand 2879 states and 11180 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) [2022-11-20 20:05:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:53,308 INFO L93 Difference]: Finished difference Result 2927 states and 11456 transitions. [2022-11-20 20:05:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:53,308 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 [2022-11-20 20:05:53,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:53,320 INFO L225 Difference]: With dead ends: 2927 [2022-11-20 20:05:53,320 INFO L226 Difference]: Without dead ends: 2927 [2022-11-20 20:05:53,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:53,321 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:53,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 20:05:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-11-20 20:05:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2889. [2022-11-20 20:05:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2875 states have (on average 3.910608695652174) internal successors, (11243), 2888 states have internal predecessors, (11243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 11243 transitions. [2022-11-20 20:05:53,395 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 11243 transitions. Word has length 11 [2022-11-20 20:05:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:53,395 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 11243 transitions. [2022-11-20 20:05:53,395 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) [2022-11-20 20:05:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 11243 transitions. [2022-11-20 20:05:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:53,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:53,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:53,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-20 20:05:53,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:53,603 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash -843096159, now seen corresponding path program 1 times [2022-11-20 20:05:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97295823] [2022-11-20 20:05:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:53,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:53,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:53,606 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:53,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 20:05:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:53,933 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:53,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:54,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:54,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:54,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97295823] [2022-11-20 20:05:54,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97295823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:54,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:54,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:54,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63385700] [2022-11-20 20:05:54,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:54,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:54,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:54,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:54,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:54,210 INFO L87 Difference]: Start difference. First operand 2889 states and 11243 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) [2022-11-20 20:05:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:54,387 INFO L93 Difference]: Finished difference Result 2905 states and 11332 transitions. [2022-11-20 20:05:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:54,387 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 [2022-11-20 20:05:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:54,395 INFO L225 Difference]: With dead ends: 2905 [2022-11-20 20:05:54,396 INFO L226 Difference]: Without dead ends: 2905 [2022-11-20 20:05:54,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:54,396 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:54,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 20:05:54,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2022-11-20 20:05:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2897. [2022-11-20 20:05:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2883 states have (on average 3.911203607353451) internal successors, (11276), 2896 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 11276 transitions. [2022-11-20 20:05:54,470 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 11276 transitions. Word has length 11 [2022-11-20 20:05:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:54,470 INFO L495 AbstractCegarLoop]: Abstraction has 2897 states and 11276 transitions. [2022-11-20 20:05:54,470 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) [2022-11-20 20:05:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 11276 transitions. [2022-11-20 20:05:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:54,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:54,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:54,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-20 20:05:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:54,672 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash -842945499, now seen corresponding path program 2 times [2022-11-20 20:05:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:54,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049206253] [2022-11-20 20:05:54,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:05:54,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:54,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:54,674 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:54,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 20:05:54,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:05:54,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:54,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:55,009 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:55,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:55,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:55,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:55,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049206253] [2022-11-20 20:05:55,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049206253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:55,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:55,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:55,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363003599] [2022-11-20 20:05:55,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:55,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:55,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:55,265 INFO L87 Difference]: Start difference. First operand 2897 states and 11276 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) [2022-11-20 20:05:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:55,439 INFO L93 Difference]: Finished difference Result 2931 states and 11425 transitions. [2022-11-20 20:05:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:55,440 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 [2022-11-20 20:05:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:55,449 INFO L225 Difference]: With dead ends: 2931 [2022-11-20 20:05:55,449 INFO L226 Difference]: Without dead ends: 2931 [2022-11-20 20:05:55,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:55,450 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:55,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 20:05:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2022-11-20 20:05:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2897. [2022-11-20 20:05:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2883 states have (on average 3.911203607353451) internal successors, (11276), 2896 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 11276 transitions. [2022-11-20 20:05:55,508 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 11276 transitions. Word has length 11 [2022-11-20 20:05:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:55,509 INFO L495 AbstractCegarLoop]: Abstraction has 2897 states and 11276 transitions. [2022-11-20 20:05:55,509 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) [2022-11-20 20:05:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 11276 transitions. [2022-11-20 20:05:55,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:55,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:55,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:55,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-20 20:05:55,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:55,711 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash -839734395, now seen corresponding path program 3 times [2022-11-20 20:05:55,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:55,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671103001] [2022-11-20 20:05:55,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:05:55,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:55,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:55,712 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:55,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 20:05:55,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:05:55,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:55,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:55,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:56,064 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:56,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:56,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:56,310 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:56,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671103001] [2022-11-20 20:05:56,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671103001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:56,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:56,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118729090] [2022-11-20 20:05:56,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:56,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:56,311 INFO L87 Difference]: Start difference. First operand 2897 states and 11276 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) [2022-11-20 20:05:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:56,509 INFO L93 Difference]: Finished difference Result 2927 states and 11433 transitions. [2022-11-20 20:05:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:56,510 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 [2022-11-20 20:05:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:56,521 INFO L225 Difference]: With dead ends: 2927 [2022-11-20 20:05:56,521 INFO L226 Difference]: Without dead ends: 2927 [2022-11-20 20:05:56,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:56,521 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:56,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 20:05:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-11-20 20:05:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2907. [2022-11-20 20:05:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2893 states have (on average 3.91185620463187) internal successors, (11317), 2906 states have internal predecessors, (11317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 11317 transitions. [2022-11-20 20:05:56,600 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 11317 transitions. Word has length 11 [2022-11-20 20:05:56,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:56,600 INFO L495 AbstractCegarLoop]: Abstraction has 2907 states and 11317 transitions. [2022-11-20 20:05:56,601 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) [2022-11-20 20:05:56,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 11317 transitions. [2022-11-20 20:05:56,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:56,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:56,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:56,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-20 20:05:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:56,803 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash -843472065, now seen corresponding path program 4 times [2022-11-20 20:05:56,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:56,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111458670] [2022-11-20 20:05:56,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:05:56,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:56,805 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:56,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 20:05:57,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:05:57,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:57,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:57,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:57,181 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:57,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:05:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:57,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:57,466 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:57,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111458670] [2022-11-20 20:05:57,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111458670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:57,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:57,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:57,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180345061] [2022-11-20 20:05:57,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:57,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:57,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:57,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:57,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:57,467 INFO L87 Difference]: Start difference. First operand 2907 states and 11317 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) [2022-11-20 20:05:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:57,673 INFO L93 Difference]: Finished difference Result 2905 states and 11302 transitions. [2022-11-20 20:05:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:57,674 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 [2022-11-20 20:05:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:57,681 INFO L225 Difference]: With dead ends: 2905 [2022-11-20 20:05:57,681 INFO L226 Difference]: Without dead ends: 2905 [2022-11-20 20:05:57,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:57,682 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:57,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 20:05:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2022-11-20 20:05:57,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2885. [2022-11-20 20:05:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2871 states have (on average 3.9038662486938347) internal successors, (11208), 2884 states have internal predecessors, (11208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 11208 transitions. [2022-11-20 20:05:57,731 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 11208 transitions. Word has length 11 [2022-11-20 20:05:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:57,731 INFO L495 AbstractCegarLoop]: Abstraction has 2885 states and 11208 transitions. [2022-11-20 20:05:57,731 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) [2022-11-20 20:05:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 11208 transitions. [2022-11-20 20:05:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:57,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:57,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:57,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-20 20:05:57,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:57,933 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:57,933 INFO L85 PathProgramCache]: Analyzing trace with hash -843470949, now seen corresponding path program 3 times [2022-11-20 20:05:57,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:57,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562711465] [2022-11-20 20:05:57,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:05:57,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:57,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:57,934 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:57,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 20:05:58,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:05:58,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:05:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:05:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:58,287 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:58,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:58,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:58,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562711465] [2022-11-20 20:05:58,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562711465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:58,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:58,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:05:58,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787607474] [2022-11-20 20:05:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:58,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:58,571 INFO L87 Difference]: Start difference. First operand 2885 states and 11208 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) [2022-11-20 20:05:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:58,774 INFO L93 Difference]: Finished difference Result 2883 states and 11195 transitions. [2022-11-20 20:05:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:58,775 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 [2022-11-20 20:05:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:58,785 INFO L225 Difference]: With dead ends: 2883 [2022-11-20 20:05:58,786 INFO L226 Difference]: Without dead ends: 2883 [2022-11-20 20:05:58,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:58,786 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:58,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-20 20:05:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-11-20 20:05:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2865. [2022-11-20 20:05:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2851 states have (on average 3.8930199929849176) internal successors, (11099), 2864 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:05:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 11099 transitions. [2022-11-20 20:05:58,890 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 11099 transitions. Word has length 11 [2022-11-20 20:05:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:05:58,891 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 11099 transitions. [2022-11-20 20:05:58,891 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) [2022-11-20 20:05:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 11099 transitions. [2022-11-20 20:05:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:05:58,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:05:58,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:05:58,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-20 20:05:59,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:59,104 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:05:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:05:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash -843382041, now seen corresponding path program 1 times [2022-11-20 20:05:59,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:05:59,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488785725] [2022-11-20 20:05:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:05:59,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:05:59,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:05:59,106 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:05:59,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 20:05:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:05:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:05:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:05:59,496 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:05:59,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:05:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:05:59,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:05:59,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:05:59,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488785725] [2022-11-20 20:05:59,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488785725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:05:59,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:05:59,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:05:59,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075882243] [2022-11-20 20:05:59,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:05:59,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:05:59,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:05:59,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:05:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:05:59,739 INFO L87 Difference]: Start difference. First operand 2865 states and 11099 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:05:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:05:59,975 INFO L93 Difference]: Finished difference Result 2865 states and 11095 transitions. [2022-11-20 20:05:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:05:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2022-11-20 20:05:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:05:59,983 INFO L225 Difference]: With dead ends: 2865 [2022-11-20 20:05:59,983 INFO L226 Difference]: Without dead ends: 2865 [2022-11-20 20:05:59,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:05:59,983 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:05:59,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-20 20:05:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2022-11-20 20:06:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2865. [2022-11-20 20:06:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2851 states have (on average 3.8916169764994737) internal successors, (11095), 2864 states have internal predecessors, (11095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 11095 transitions. [2022-11-20 20:06:00,028 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 11095 transitions. Word has length 11 [2022-11-20 20:06:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:06:00,028 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 11095 transitions. [2022-11-20 20:06:00,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:06:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 11095 transitions. [2022-11-20 20:06:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:06:00,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:06:00,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:06:00,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-20 20:06:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:00,230 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:06:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:06:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash -869300211, now seen corresponding path program 2 times [2022-11-20 20:06:00,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:06:00,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212713500] [2022-11-20 20:06:00,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:06:00,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:00,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:06:00,232 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:06:00,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 20:06:00,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:06:00,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:06:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:06:00,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:00,623 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:00,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:00,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:06:00,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:06:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212713500] [2022-11-20 20:06:00,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212713500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:06:00,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:06:00,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:06:00,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726175260] [2022-11-20 20:06:00,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:06:00,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:06:00,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:06:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:06:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:06:00,820 INFO L87 Difference]: Start difference. First operand 2865 states and 11095 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:06:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:06:01,040 INFO L93 Difference]: Finished difference Result 2849 states and 11027 transitions. [2022-11-20 20:06:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:06:01,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2022-11-20 20:06:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:06:01,048 INFO L225 Difference]: With dead ends: 2849 [2022-11-20 20:06:01,048 INFO L226 Difference]: Without dead ends: 2849 [2022-11-20 20:06:01,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:06:01,049 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:06:01,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 14 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-20 20:06:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2022-11-20 20:06:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2849. [2022-11-20 20:06:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2835 states have (on average 3.889594356261023) internal successors, (11027), 2848 states have internal predecessors, (11027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 11027 transitions. [2022-11-20 20:06:01,117 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 11027 transitions. Word has length 11 [2022-11-20 20:06:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:06:01,117 INFO L495 AbstractCegarLoop]: Abstraction has 2849 states and 11027 transitions. [2022-11-20 20:06:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:06:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 11027 transitions. [2022-11-20 20:06:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:06:01,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:06:01,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:06:01,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-20 20:06:01,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:01,318 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:06:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:06:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1874360352, now seen corresponding path program 2 times [2022-11-20 20:06:01,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:06:01,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802036375] [2022-11-20 20:06:01,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:06:01,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:06:01,320 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:06:01,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-20 20:06:01,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:06:01,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:06:01,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:06:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:01,695 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:01,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:06:01,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:06:01,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:06:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802036375] [2022-11-20 20:06:01,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802036375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:06:01,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:06:01,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:06:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360421813] [2022-11-20 20:06:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:06:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:06:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:06:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:06:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:06:01,844 INFO L87 Difference]: Start difference. First operand 2849 states and 11027 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:06:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:06:02,076 INFO L93 Difference]: Finished difference Result 2849 states and 11029 transitions. [2022-11-20 20:06:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:06:02,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2022-11-20 20:06:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:06:02,085 INFO L225 Difference]: With dead ends: 2849 [2022-11-20 20:06:02,085 INFO L226 Difference]: Without dead ends: 2849 [2022-11-20 20:06:02,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:06:02,085 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:06:02,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 20:06:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2022-11-20 20:06:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2847. [2022-11-20 20:06:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2833 states have (on average 3.890928344511119) internal successors, (11023), 2846 states have internal predecessors, (11023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 11023 transitions. [2022-11-20 20:06:02,140 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 11023 transitions. Word has length 11 [2022-11-20 20:06:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:06:02,140 INFO L495 AbstractCegarLoop]: Abstraction has 2847 states and 11023 transitions. [2022-11-20 20:06:02,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:06:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 11023 transitions. [2022-11-20 20:06:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:06:02,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:06:02,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:06:02,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-20 20:06:02,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:02,345 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:06:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:06:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1010134008, now seen corresponding path program 3 times [2022-11-20 20:06:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:06:02,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801152064] [2022-11-20 20:06:02,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:06:02,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:02,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:06:02,346 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:06:02,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-20 20:06:02,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:06:02,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:06:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:06:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:02,699 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:02,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:06:02,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:06:02,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:06:02,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801152064] [2022-11-20 20:06:02,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801152064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:06:02,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:06:02,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:06:02,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62342722] [2022-11-20 20:06:02,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:06:02,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:06:02,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:06:02,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:06:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:06:02,839 INFO L87 Difference]: Start difference. First operand 2847 states and 11023 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:06:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:06:03,078 INFO L93 Difference]: Finished difference Result 2836 states and 10989 transitions. [2022-11-20 20:06:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:06:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 [2022-11-20 20:06:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:06:03,086 INFO L225 Difference]: With dead ends: 2836 [2022-11-20 20:06:03,086 INFO L226 Difference]: Without dead ends: 2836 [2022-11-20 20:06:03,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:06:03,087 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:06:03,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-20 20:06:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2022-11-20 20:06:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2833. [2022-11-20 20:06:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2819 states have (on average 3.895352962043278) internal successors, (10981), 2832 states have internal predecessors, (10981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 10981 transitions. [2022-11-20 20:06:03,154 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 10981 transitions. Word has length 11 [2022-11-20 20:06:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:06:03,154 INFO L495 AbstractCegarLoop]: Abstraction has 2833 states and 10981 transitions. [2022-11-20 20:06:03,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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) [2022-11-20 20:06:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 10981 transitions. [2022-11-20 20:06:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:06:03,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:06:03,156 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 20:06:03,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-20 20:06:03,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:03,356 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:06:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:06:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash 535410268, now seen corresponding path program 3 times [2022-11-20 20:06:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:06:03,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130640820] [2022-11-20 20:06:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:06:03,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:03,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:06:03,358 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:06:03,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-20 20:06:03,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:06:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:06:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:06:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:03,828 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:03,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:04,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:06:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:07,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:06:07,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130640820] [2022-11-20 20:06:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130640820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:06:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [468805662] [2022-11-20 20:06:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:06:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:06:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:06:07,193 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:06:07,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-20 20:06:08,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:06:08,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:06:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:06:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:08,257 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:08,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:08,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:06:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:08,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [468805662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:06:08,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721271311] [2022-11-20 20:06:08,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:06:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:06:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:06:08,840 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:06:08,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-20 20:06:11,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:06:11,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:06:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:06:11,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:11,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:11,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:11,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:06:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:12,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721271311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:06:12,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:06:12,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-20 20:06:12,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253410] [2022-11-20 20:06:12,171 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:06:12,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:06:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:06:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:06:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:06:12,172 INFO L87 Difference]: Start difference. First operand 2833 states and 10981 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:06:38,958 INFO L93 Difference]: Finished difference Result 19419 states and 74424 transitions. [2022-11-20 20:06:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 20:06:38,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:06:38,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:06:39,036 INFO L225 Difference]: With dead ends: 19419 [2022-11-20 20:06:39,036 INFO L226 Difference]: Without dead ends: 19419 [2022-11-20 20:06:39,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:06:39,037 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3701 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 3474 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3701 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 3496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:06:39,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3701 Valid, 393 Invalid, 3496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3474 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2022-11-20 20:06:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19419 states. [2022-11-20 20:06:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19419 to 2845. [2022-11-20 20:06:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2831 states have (on average 3.8873189685623455) internal successors, (11005), 2844 states have internal predecessors, (11005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 11005 transitions. [2022-11-20 20:06:39,297 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 11005 transitions. Word has length 12 [2022-11-20 20:06:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:06:39,297 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 11005 transitions. [2022-11-20 20:06:39,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 11005 transitions. [2022-11-20 20:06:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:06:39,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:06:39,299 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:06:39,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-20 20:06:39,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-20 20:06:39,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2022-11-20 20:06:39,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:06:39,900 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:06:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:06:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1718727268, now seen corresponding path program 2 times [2022-11-20 20:06:39,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:06:39,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444278469] [2022-11-20 20:06:39,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:06:39,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:39,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:06:39,902 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:06:39,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-20 20:06:40,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:06:40,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:06:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:06:40,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:40,262 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:40,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:06:40,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:06:40,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:06:40,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444278469] [2022-11-20 20:06:40,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444278469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:06:40,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:06:40,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:06:40,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780014921] [2022-11-20 20:06:40,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:06:40,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:06:40,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:06:40,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:06:40,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:06:40,508 INFO L87 Difference]: Start difference. First operand 2845 states and 11005 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) [2022-11-20 20:06:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:06:41,048 INFO L93 Difference]: Finished difference Result 3593 states and 13929 transitions. [2022-11-20 20:06:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:06:41,049 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 [2022-11-20 20:06:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:06:41,059 INFO L225 Difference]: With dead ends: 3593 [2022-11-20 20:06:41,059 INFO L226 Difference]: Without dead ends: 3593 [2022-11-20 20:06:41,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:06:41,060 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 82 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:06:41,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:06:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2022-11-20 20:06:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2649. [2022-11-20 20:06:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2635 states have (on average 3.9199240986717268) internal successors, (10329), 2648 states have internal predecessors, (10329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:06:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 10329 transitions. [2022-11-20 20:06:41,110 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 10329 transitions. Word has length 12 [2022-11-20 20:06:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:06:41,110 INFO L495 AbstractCegarLoop]: Abstraction has 2649 states and 10329 transitions. [2022-11-20 20:06:41,110 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) [2022-11-20 20:06:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 10329 transitions. [2022-11-20 20:06:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:06:41,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:06:41,112 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:06:41,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-20 20:06:41,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:41,312 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:06:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:06:41,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1199706800, now seen corresponding path program 1 times [2022-11-20 20:06:41,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:06:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370054933] [2022-11-20 20:06:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:06:41,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:06:41,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:06:41,314 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:06:41,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-20 20:06:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:06:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:06:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:41,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:06:41,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:06:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:42,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:06:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:06:44,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:06:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370054933] [2022-11-20 20:06:44,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370054933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:06:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [578703399] [2022-11-20 20:06:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:06:44,086 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:06:44,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:06:44,088 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:06:44,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-20 20:06:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:06:44,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:06:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:06:45,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:06:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:06:46,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [578703399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:06:46,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723777601] [2022-11-20 20:06:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:06:46,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:06:46,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:06:46,503 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:06:46,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-20 20:06:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:06:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:06:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:06:47,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:06:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:06:47,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723777601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:06:47,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:06:47,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-20 20:06:47,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623046659] [2022-11-20 20:06:47,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:06:47,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 20:06:47,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:06:47,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 20:06:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 20:06:47,284 INFO L87 Difference]: Start difference. First operand 2649 states and 10329 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:07:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:07:36,392 INFO L93 Difference]: Finished difference Result 6507 states and 24391 transitions. [2022-11-20 20:07:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 20:07:36,394 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:07:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:07:36,413 INFO L225 Difference]: With dead ends: 6507 [2022-11-20 20:07:36,413 INFO L226 Difference]: Without dead ends: 6507 [2022-11-20 20:07:36,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=655, Invalid=4315, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 20:07:36,414 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1164 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 5402 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 6221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:07:36,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 782 Invalid, 6221 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 5402 Invalid, 0 Unknown, 795 Unchecked, 29.9s Time] [2022-11-20 20:07:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6507 states. [2022-11-20 20:07:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6507 to 2592. [2022-11-20 20:07:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2578 states have (on average 3.885570209464701) internal successors, (10017), 2591 states have internal predecessors, (10017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:07:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 10017 transitions. [2022-11-20 20:07:36,492 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 10017 transitions. Word has length 12 [2022-11-20 20:07:36,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:07:36,493 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 10017 transitions. [2022-11-20 20:07:36,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:07:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 10017 transitions. [2022-11-20 20:07:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:07:36,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:07:36,494 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:07:36,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-20 20:07:36,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-20 20:07:36,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-11-20 20:07:37,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:07:37,095 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:07:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:07:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash 770716400, now seen corresponding path program 2 times [2022-11-20 20:07:37,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:07:37,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143132473] [2022-11-20 20:07:37,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:07:37,096 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 [2022-11-20 20:07:37,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:07:37,097 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:07:37,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-20 20:07:37,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:07:37,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:07:37,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:07:37,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:07:37,522 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:07:37,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:07:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:07:37,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:07:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:07:39,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:07:39,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143132473] [2022-11-20 20:07:39,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143132473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:07:39,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843449311] [2022-11-20 20:07:39,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:07:39,845 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:07:39,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:07:39,846 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:07:39,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-20 20:07:40,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:07:40,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:07:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:07:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:07:40,558 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:07:40,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:07:40,803 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 [2022-11-20 20:07:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:07:41,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:07:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:07:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843449311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:07:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582746900] [2022-11-20 20:07:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:07:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:07:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:07:42,624 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:07:42,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-20 20:07:42,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:07:42,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:07:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:07:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:07:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:07:43,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:07:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:07:43,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582746900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:07:43,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:07:43,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 36 [2022-11-20 20:07:43,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023698442] [2022-11-20 20:07:43,971 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:07:43,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 20:07:43,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:07:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 20:07:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:07:43,972 INFO L87 Difference]: Start difference. First operand 2592 states and 10017 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:30,661 INFO L93 Difference]: Finished difference Result 7919 states and 29234 transitions. [2022-11-20 20:08:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 20:08:30,664 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:08:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:30,689 INFO L225 Difference]: With dead ends: 7919 [2022-11-20 20:08:30,689 INFO L226 Difference]: Without dead ends: 7919 [2022-11-20 20:08:30,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=952, Invalid=5854, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 20:08:30,690 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1532 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 5105 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 6244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1103 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:30,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 760 Invalid, 6244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 5105 Invalid, 0 Unknown, 1103 Unchecked, 27.3s Time] [2022-11-20 20:08:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7919 states. [2022-11-20 20:08:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7919 to 2859. [2022-11-20 20:08:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2845 states have (on average 3.919507908611599) internal successors, (11151), 2858 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 11151 transitions. [2022-11-20 20:08:30,784 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 11151 transitions. Word has length 12 [2022-11-20 20:08:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:30,784 INFO L495 AbstractCegarLoop]: Abstraction has 2859 states and 11151 transitions. [2022-11-20 20:08:30,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:30,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 11151 transitions. [2022-11-20 20:08:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:08:30,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:30,786 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:08:30,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-20 20:08:30,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-20 20:08:31,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-11-20 20:08:31,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:08:31,387 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:08:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1608183674, now seen corresponding path program 3 times [2022-11-20 20:08:31,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:08:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453419770] [2022-11-20 20:08:31,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:08:31,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:08:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:08:31,389 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:08:31,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-20 20:08:31,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:08:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:08:31,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:08:31,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:31,886 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:08:31,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:08:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:32,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:32,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:08:32,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453419770] [2022-11-20 20:08:32,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453419770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:32,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2138102894] [2022-11-20 20:08:32,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:08:32,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:08:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:08:32,963 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:08:32,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-20 20:08:33,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:08:33,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:08:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:08:33,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:33,958 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:08:33,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:08:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:34,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:34,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2138102894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364122754] [2022-11-20 20:08:34,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:08:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:08:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:08:34,252 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:08:34,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-20 20:08:34,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:08:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:08:34,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:08:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:35,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:35,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364122754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:35,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:08:35,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 29 [2022-11-20 20:08:35,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77973245] [2022-11-20 20:08:35,860 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:08:35,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:08:35,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:08:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:08:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:08:35,861 INFO L87 Difference]: Start difference. First operand 2859 states and 11151 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2022-11-20 20:08:46,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:46,892 INFO L93 Difference]: Finished difference Result 4648 states and 17745 transitions. [2022-11-20 20:08:46,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:08:46,892 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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 12 [2022-11-20 20:08:46,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:46,904 INFO L225 Difference]: With dead ends: 4648 [2022-11-20 20:08:46,905 INFO L226 Difference]: Without dead ends: 4648 [2022-11-20 20:08:46,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 20:08:46,905 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 846 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 2098 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:46,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 323 Invalid, 2395 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 2098 Invalid, 0 Unknown, 276 Unchecked, 8.0s Time] [2022-11-20 20:08:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2022-11-20 20:08:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 2862. [2022-11-20 20:08:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2848 states have (on average 3.917837078651685) internal successors, (11158), 2861 states have internal predecessors, (11158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 11158 transitions. [2022-11-20 20:08:46,970 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 11158 transitions. Word has length 12 [2022-11-20 20:08:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:46,970 INFO L495 AbstractCegarLoop]: Abstraction has 2862 states and 11158 transitions. [2022-11-20 20:08:46,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2022-11-20 20:08:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 11158 transitions. [2022-11-20 20:08:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:08:46,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:46,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:08:46,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-20 20:08:47,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-11-20 20:08:47,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-20 20:08:47,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:08:47,573 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:08:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -907719419, now seen corresponding path program 1 times [2022-11-20 20:08:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:08:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310868421] [2022-11-20 20:08:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:47,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:08:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:08:47,575 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:08:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-20 20:08:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:47,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:08:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:48,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:08:48,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:08:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:48,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:49,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:08:49,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310868421] [2022-11-20 20:08:49,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310868421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:49,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111672049] [2022-11-20 20:08:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:49,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:08:49,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:08:49,192 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:08:49,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-20 20:08:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:08:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:50,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:50,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111672049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:50,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817999585] [2022-11-20 20:08:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:08:50,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:08:50,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:08:50,484 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:08:50,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-20 20:08:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:08:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:08:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:50,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:50,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817999585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:50,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:08:50,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:08:50,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822576769] [2022-11-20 20:08:50,985 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:08:50,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:08:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:08:50,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:08:50,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:08:50,986 INFO L87 Difference]: Start difference. First operand 2862 states and 11158 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:55,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:08:55,490 INFO L93 Difference]: Finished difference Result 2927 states and 11453 transitions. [2022-11-20 20:08:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:08:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:08:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:08:55,500 INFO L225 Difference]: With dead ends: 2927 [2022-11-20 20:08:55,500 INFO L226 Difference]: Without dead ends: 2927 [2022-11-20 20:08:55,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:08:55,500 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:08:55,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 69 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 15 Unchecked, 1.0s Time] [2022-11-20 20:08:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-11-20 20:08:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2905. [2022-11-20 20:08:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2905 states, 2891 states have (on average 3.926668972673815) internal successors, (11352), 2904 states have internal predecessors, (11352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2905 states to 2905 states and 11352 transitions. [2022-11-20 20:08:55,564 INFO L78 Accepts]: Start accepts. Automaton has 2905 states and 11352 transitions. Word has length 12 [2022-11-20 20:08:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:08:55,564 INFO L495 AbstractCegarLoop]: Abstraction has 2905 states and 11352 transitions. [2022-11-20 20:08:55,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:08:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2905 states and 11352 transitions. [2022-11-20 20:08:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:08:55,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:08:55,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:08:55,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2022-11-20 20:08:55,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-11-20 20:08:55,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-20 20:08:56,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:08:56,167 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:08:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:08:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash -985776535, now seen corresponding path program 2 times [2022-11-20 20:08:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:08:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060495106] [2022-11-20 20:08:56,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:08:56,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:08:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:08:56,169 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:08:56,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-20 20:08:56,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:08:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:08:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:08:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:56,721 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:08:56,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:08:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:57,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:08:57,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:08:57,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060495106] [2022-11-20 20:08:57,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060495106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:57,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392573618] [2022-11-20 20:08:57,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:08:57,587 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:08:57,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:08:57,588 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:08:57,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-20 20:08:58,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:08:58,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:08:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:08:58,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:08:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:58,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:08:59,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392573618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344012844] [2022-11-20 20:08:59,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:08:59,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:08:59,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:08:59,345 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:08:59,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-20 20:08:59,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:08:59,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:08:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:08:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:00,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:00,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344012844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:00,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:09:00,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 7, 6, 6] total 30 [2022-11-20 20:09:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287654222] [2022-11-20 20:09:00,502 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:09:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 20:09:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 20:09:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:09:00,503 INFO L87 Difference]: Start difference. First operand 2905 states and 11352 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:05,260 INFO L93 Difference]: Finished difference Result 2970 states and 11624 transitions. [2022-11-20 20:09:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 20:09:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:05,267 INFO L225 Difference]: With dead ends: 2970 [2022-11-20 20:09:05,267 INFO L226 Difference]: Without dead ends: 2970 [2022-11-20 20:09:05,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 20:09:05,268 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:05,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 90 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 92 Unchecked, 1.2s Time] [2022-11-20 20:09:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2022-11-20 20:09:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2935. [2022-11-20 20:09:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2921 states have (on average 3.935980828483396) internal successors, (11497), 2934 states have internal predecessors, (11497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 11497 transitions. [2022-11-20 20:09:05,318 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 11497 transitions. Word has length 12 [2022-11-20 20:09:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:05,318 INFO L495 AbstractCegarLoop]: Abstraction has 2935 states and 11497 transitions. [2022-11-20 20:09:05,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 11497 transitions. [2022-11-20 20:09:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:05,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:05,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:05,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (114)] Ended with exit code 0 [2022-11-20 20:09:05,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-20 20:09:05,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-11-20 20:09:05,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:05,920 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash -988029925, now seen corresponding path program 3 times [2022-11-20 20:09:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143263511] [2022-11-20 20:09:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:05,921 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 [2022-11-20 20:09:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:05,922 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:05,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-20 20:09:06,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:09:06,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:09:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:06,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:06,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:06,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:07,307 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143263511] [2022-11-20 20:09:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143263511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:07,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574906023] [2022-11-20 20:09:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:07,308 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:07,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:09:07,311 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:09:07,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2022-11-20 20:09:07,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:09:07,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:09:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:08,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:08,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574906023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025342303] [2022-11-20 20:09:08,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:08,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:08,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:09:08,603 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:09:08,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-20 20:09:08,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:09:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:09:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:09,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:09,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025342303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:09,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:09:09,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:09:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809838982] [2022-11-20 20:09:09,469 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:09:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:09:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:09:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:09:09,471 INFO L87 Difference]: Start difference. First operand 2935 states and 11497 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:12,194 INFO L93 Difference]: Finished difference Result 2979 states and 11683 transitions. [2022-11-20 20:09:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:09:12,194 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:12,201 INFO L225 Difference]: With dead ends: 2979 [2022-11-20 20:09:12,201 INFO L226 Difference]: Without dead ends: 2979 [2022-11-20 20:09:12,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:09:12,202 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:12,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 228 Invalid, 0 Unknown, 50 Unchecked, 1.0s Time] [2022-11-20 20:09:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2022-11-20 20:09:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2950. [2022-11-20 20:09:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2936 states have (on average 3.9400544959128063) internal successors, (11568), 2949 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 11568 transitions. [2022-11-20 20:09:12,254 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 11568 transitions. Word has length 12 [2022-11-20 20:09:12,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:12,254 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 11568 transitions. [2022-11-20 20:09:12,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 11568 transitions. [2022-11-20 20:09:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:12,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:12,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:12,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:12,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:12,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (117)] Ended with exit code 0 [2022-11-20 20:09:12,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:12,866 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1124013624, now seen corresponding path program 1 times [2022-11-20 20:09:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:12,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565885888] [2022-11-20 20:09:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:12,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:12,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:12,868 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:12,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-20 20:09:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:09:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:13,268 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:13,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:13,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:14,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565885888] [2022-11-20 20:09:14,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565885888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1507985020] [2022-11-20 20:09:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:14,409 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:14,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:09:14,410 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:09:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (120)] Waiting until timeout for monitored process [2022-11-20 20:09:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:09:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:15,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:15,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1507985020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:15,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413203893] [2022-11-20 20:09:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:15,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:15,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:09:15,829 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:09:15,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-20 20:09:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:09:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:16,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:16,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413203893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:16,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:09:16,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:09:16,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668674256] [2022-11-20 20:09:16,339 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:09:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:09:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:16,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:09:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:09:16,340 INFO L87 Difference]: Start difference. First operand 2950 states and 11568 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:18,398 INFO L93 Difference]: Finished difference Result 3042 states and 11953 transitions. [2022-11-20 20:09:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:09:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:18,407 INFO L225 Difference]: With dead ends: 3042 [2022-11-20 20:09:18,407 INFO L226 Difference]: Without dead ends: 3042 [2022-11-20 20:09:18,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:09:18,408 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:18,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 58 Unchecked, 0.9s Time] [2022-11-20 20:09:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-11-20 20:09:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2983. [2022-11-20 20:09:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2969 states have (on average 3.940383967665881) internal successors, (11699), 2982 states have internal predecessors, (11699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 11699 transitions. [2022-11-20 20:09:18,475 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 11699 transitions. Word has length 12 [2022-11-20 20:09:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:18,475 INFO L495 AbstractCegarLoop]: Abstraction has 2983 states and 11699 transitions. [2022-11-20 20:09:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 11699 transitions. [2022-11-20 20:09:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:18,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:18,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:18,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-20 20:09:18,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:18,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (120)] Ended with exit code 0 [2022-11-20 20:09:19,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:19,079 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash -463790260, now seen corresponding path program 2 times [2022-11-20 20:09:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:19,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045688544] [2022-11-20 20:09:19,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:09:19,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:19,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:19,081 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:19,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-20 20:09:19,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:09:19,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:09:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:19,526 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:19,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:09:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:19,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:20,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045688544] [2022-11-20 20:09:20,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045688544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [869814530] [2022-11-20 20:09:20,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:09:20,407 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:09:20,408 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:09:20,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-20 20:09:20,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:09:20,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:09:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:21,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:21,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [869814530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104961253] [2022-11-20 20:09:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:09:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:09:21,614 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:09:21,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-20 20:09:21,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:09:21,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:21,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:09:21,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:22,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104961253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:22,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:09:22,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:09:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622032479] [2022-11-20 20:09:22,537 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:09:22,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:09:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:09:22,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:09:22,537 INFO L87 Difference]: Start difference. First operand 2983 states and 11699 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:25,092 INFO L93 Difference]: Finished difference Result 3044 states and 11974 transitions. [2022-11-20 20:09:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:09:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:25,100 INFO L225 Difference]: With dead ends: 3044 [2022-11-20 20:09:25,100 INFO L226 Difference]: Without dead ends: 3044 [2022-11-20 20:09:25,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:09:25,100 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:25,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 69 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 244 Invalid, 0 Unknown, 39 Unchecked, 1.0s Time] [2022-11-20 20:09:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-20 20:09:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2988. [2022-11-20 20:09:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2974 states have (on average 3.9404841963685273) internal successors, (11719), 2987 states have internal predecessors, (11719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 11719 transitions. [2022-11-20 20:09:25,154 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 11719 transitions. Word has length 12 [2022-11-20 20:09:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:25,154 INFO L495 AbstractCegarLoop]: Abstraction has 2988 states and 11719 transitions. [2022-11-20 20:09:25,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 11719 transitions. [2022-11-20 20:09:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:25,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:25,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:25,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-20 20:09:25,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Ended with exit code 0 [2022-11-20 20:09:25,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (123)] Ended with exit code 0 [2022-11-20 20:09:25,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:25,757 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:25,757 INFO L85 PathProgramCache]: Analyzing trace with hash -489708430, now seen corresponding path program 3 times [2022-11-20 20:09:25,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:25,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098942195] [2022-11-20 20:09:25,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:25,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:25,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:25,759 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:25,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-20 20:09:26,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:09:26,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:09:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:26,290 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:26,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:26,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:27,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:27,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098942195] [2022-11-20 20:09:27,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098942195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:27,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1633460423] [2022-11-20 20:09:27,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:27,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:27,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:09:27,142 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:09:27,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2022-11-20 20:09:27,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:09:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:27,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:09:27,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:28,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:28,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1633460423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:28,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905675289] [2022-11-20 20:09:28,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:28,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:28,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:09:28,429 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:09:28,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-20 20:09:28,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:09:28,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:09:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:29,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:29,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905675289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:29,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:09:29,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:09:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139278246] [2022-11-20 20:09:29,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:09:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:09:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:09:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:09:29,418 INFO L87 Difference]: Start difference. First operand 2988 states and 11719 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:32,045 INFO L93 Difference]: Finished difference Result 3044 states and 11968 transitions. [2022-11-20 20:09:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:09:32,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:32,054 INFO L225 Difference]: With dead ends: 3044 [2022-11-20 20:09:32,055 INFO L226 Difference]: Without dead ends: 3044 [2022-11-20 20:09:32,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 20:09:32,055 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:32,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 74 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 41 Unchecked, 1.1s Time] [2022-11-20 20:09:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-20 20:09:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2995. [2022-11-20 20:09:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2981 states have (on average 3.945320362294532) internal successors, (11761), 2994 states have internal predecessors, (11761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 11761 transitions. [2022-11-20 20:09:32,117 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 11761 transitions. Word has length 12 [2022-11-20 20:09:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:32,117 INFO L495 AbstractCegarLoop]: Abstraction has 2995 states and 11761 transitions. [2022-11-20 20:09:32,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 11761 transitions. [2022-11-20 20:09:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:32,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:32,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:32,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:32,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:32,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (126)] Ended with exit code 0 [2022-11-20 20:09:32,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:32,720 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash -487378780, now seen corresponding path program 4 times [2022-11-20 20:09:32,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:32,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542521546] [2022-11-20 20:09:32,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:09:32,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:32,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:32,722 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:32,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-20 20:09:32,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:09:32,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:09:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:33,136 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:33,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:33,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:34,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542521546] [2022-11-20 20:09:34,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542521546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2004109731] [2022-11-20 20:09:34,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:09:34,252 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:09:34,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:09:34,256 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:09:34,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-20 20:09:34,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:09:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:09:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:35,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:35,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2004109731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:35,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130826912] [2022-11-20 20:09:35,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:09:35,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:35,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:09:35,698 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:09:35,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-20 20:09:36,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:09:36,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:09:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:36,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:36,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130826912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:36,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:09:36,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:09:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622668698] [2022-11-20 20:09:36,173 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:09:36,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:09:36,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:09:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:09:36,174 INFO L87 Difference]: Start difference. First operand 2995 states and 11761 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:39,896 INFO L93 Difference]: Finished difference Result 3325 states and 13165 transitions. [2022-11-20 20:09:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:09:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:39,905 INFO L225 Difference]: With dead ends: 3325 [2022-11-20 20:09:39,905 INFO L226 Difference]: Without dead ends: 3325 [2022-11-20 20:09:39,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:09:39,906 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:39,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 424 Invalid, 0 Unknown, 118 Unchecked, 1.9s Time] [2022-11-20 20:09:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-11-20 20:09:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3049. [2022-11-20 20:09:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 3035 states have (on average 3.9525535420098845) internal successors, (11996), 3048 states have internal predecessors, (11996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 11996 transitions. [2022-11-20 20:09:39,962 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 11996 transitions. Word has length 12 [2022-11-20 20:09:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:39,963 INFO L495 AbstractCegarLoop]: Abstraction has 3049 states and 11996 transitions. [2022-11-20 20:09:39,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 11996 transitions. [2022-11-20 20:09:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:39,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:39,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:39,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (129)] Ended with exit code 0 [2022-11-20 20:09:40,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-11-20 20:09:40,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Ended with exit code 0 [2022-11-20 20:09:40,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:40,565 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:40,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1615123047, now seen corresponding path program 1 times [2022-11-20 20:09:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:40,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864388462] [2022-11-20 20:09:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:40,566 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 [2022-11-20 20:09:40,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:40,567 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:40,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-20 20:09:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:40,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:40,983 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:40,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:41,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:41,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:41,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864388462] [2022-11-20 20:09:41,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864388462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:41,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:41,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:41,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017862941] [2022-11-20 20:09:41,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:41,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:41,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:41,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:41,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:41,275 INFO L87 Difference]: Start difference. First operand 3049 states and 11996 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:41,471 INFO L93 Difference]: Finished difference Result 3055 states and 12012 transitions. [2022-11-20 20:09:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:41,480 INFO L225 Difference]: With dead ends: 3055 [2022-11-20 20:09:41,480 INFO L226 Difference]: Without dead ends: 3055 [2022-11-20 20:09:41,480 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 [2022-11-20 20:09:41,480 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:41,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-11-20 20:09:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-11-20 20:09:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3052. [2022-11-20 20:09:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3038 states have (on average 3.9512837393021725) internal successors, (12004), 3051 states have internal predecessors, (12004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 12004 transitions. [2022-11-20 20:09:41,532 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 12004 transitions. Word has length 12 [2022-11-20 20:09:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:41,533 INFO L495 AbstractCegarLoop]: Abstraction has 3052 states and 12004 transitions. [2022-11-20 20:09:41,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 12004 transitions. [2022-11-20 20:09:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:41,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:41,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:41,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:41,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:41,739 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1615126550, now seen corresponding path program 1 times [2022-11-20 20:09:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:41,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112334884] [2022-11-20 20:09:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:41,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:41,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:41,741 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:41,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-20 20:09:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:42,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:42,175 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:42,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:42,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:42,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:42,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112334884] [2022-11-20 20:09:42,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112334884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:42,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:42,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:42,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977416762] [2022-11-20 20:09:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:42,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:42,540 INFO L87 Difference]: Start difference. First operand 3052 states and 12004 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:42,763 INFO L93 Difference]: Finished difference Result 3072 states and 12053 transitions. [2022-11-20 20:09:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:42,772 INFO L225 Difference]: With dead ends: 3072 [2022-11-20 20:09:42,772 INFO L226 Difference]: Without dead ends: 3072 [2022-11-20 20:09:42,773 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 [2022-11-20 20:09:42,773 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:42,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 11 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-11-20 20:09:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2022-11-20 20:09:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3048. [2022-11-20 20:09:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3034 states have (on average 3.953197099538563) internal successors, (11994), 3047 states have internal predecessors, (11994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 11994 transitions. [2022-11-20 20:09:42,828 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 11994 transitions. Word has length 12 [2022-11-20 20:09:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:42,828 INFO L495 AbstractCegarLoop]: Abstraction has 3048 states and 11994 transitions. [2022-11-20 20:09:42,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 11994 transitions. [2022-11-20 20:09:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:42,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:42,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:42,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-20 20:09:43,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:43,031 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1775055147, now seen corresponding path program 2 times [2022-11-20 20:09:43,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:43,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522329212] [2022-11-20 20:09:43,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:09:43,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:43,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:43,033 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:43,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-20 20:09:43,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:09:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:43,455 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:43,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:09:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:43,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:43,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522329212] [2022-11-20 20:09:43,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522329212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:43,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:43,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:43,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648541006] [2022-11-20 20:09:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:43,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:43,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:43,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:43,751 INFO L87 Difference]: Start difference. First operand 3048 states and 11994 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:43,931 INFO L93 Difference]: Finished difference Result 3062 states and 12057 transitions. [2022-11-20 20:09:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:43,940 INFO L225 Difference]: With dead ends: 3062 [2022-11-20 20:09:43,940 INFO L226 Difference]: Without dead ends: 3062 [2022-11-20 20:09:43,940 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 [2022-11-20 20:09:43,940 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:43,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 20:09:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2022-11-20 20:09:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3049. [2022-11-20 20:09:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 3035 states have (on average 3.9528830313014827) internal successors, (11997), 3048 states have internal predecessors, (11997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 11997 transitions. [2022-11-20 20:09:43,992 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 11997 transitions. Word has length 12 [2022-11-20 20:09:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:43,992 INFO L495 AbstractCegarLoop]: Abstraction has 3049 states and 11997 transitions. [2022-11-20 20:09:43,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 11997 transitions. [2022-11-20 20:09:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:43,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:43,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:44,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:44,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:44,194 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1775163740, now seen corresponding path program 2 times [2022-11-20 20:09:44,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:44,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237751179] [2022-11-20 20:09:44,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:09:44,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:44,196 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:44,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-20 20:09:44,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:09:44,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:44,596 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:44,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:44,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:44,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237751179] [2022-11-20 20:09:44,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237751179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:44,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:44,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:44,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916328426] [2022-11-20 20:09:44,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:44,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:44,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:44,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:44,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:44,862 INFO L87 Difference]: Start difference. First operand 3049 states and 11997 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:45,065 INFO L93 Difference]: Finished difference Result 3062 states and 12044 transitions. [2022-11-20 20:09:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:45,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:45,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:45,075 INFO L225 Difference]: With dead ends: 3062 [2022-11-20 20:09:45,075 INFO L226 Difference]: Without dead ends: 3062 [2022-11-20 20:09:45,075 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 [2022-11-20 20:09:45,076 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:45,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 20:09:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2022-11-20 20:09:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 3050. [2022-11-20 20:09:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3036 states have (on average 3.952569169960474) internal successors, (12000), 3049 states have internal predecessors, (12000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 12000 transitions. [2022-11-20 20:09:45,159 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 12000 transitions. Word has length 12 [2022-11-20 20:09:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:45,159 INFO L495 AbstractCegarLoop]: Abstraction has 3050 states and 12000 transitions. [2022-11-20 20:09:45,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 12000 transitions. [2022-11-20 20:09:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:45,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:45,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:45,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:45,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:45,375 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:45,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:45,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1775164737, now seen corresponding path program 1 times [2022-11-20 20:09:45,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:45,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062030420] [2022-11-20 20:09:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:45,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:45,377 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:45,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-20 20:09:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:09:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:45,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:45,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:45,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062030420] [2022-11-20 20:09:45,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062030420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:45,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:45,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:09:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603069820] [2022-11-20 20:09:45,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:45,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:09:45,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:09:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:09:45,707 INFO L87 Difference]: Start difference. First operand 3050 states and 12000 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) [2022-11-20 20:09:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:45,891 INFO L93 Difference]: Finished difference Result 2974 states and 11751 transitions. [2022-11-20 20:09:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:09:45,892 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 [2022-11-20 20:09:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:45,901 INFO L225 Difference]: With dead ends: 2974 [2022-11-20 20:09:45,901 INFO L226 Difference]: Without dead ends: 2974 [2022-11-20 20:09:45,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:09:45,901 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:45,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:09:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2974 states. [2022-11-20 20:09:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2974 to 2974. [2022-11-20 20:09:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2965 states have (on average 3.963237774030354) internal successors, (11751), 2973 states have internal predecessors, (11751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 11751 transitions. [2022-11-20 20:09:45,953 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 11751 transitions. Word has length 12 [2022-11-20 20:09:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:45,954 INFO L495 AbstractCegarLoop]: Abstraction has 2974 states and 11751 transitions. [2022-11-20 20:09:45,954 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) [2022-11-20 20:09:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 11751 transitions. [2022-11-20 20:09:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:45,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:45,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:45,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-20 20:09:46,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:46,156 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1775043057, now seen corresponding path program 3 times [2022-11-20 20:09:46,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:46,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036269729] [2022-11-20 20:09:46,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:46,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:46,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:46,158 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:46,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-20 20:09:46,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:09:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:46,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:46,606 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:46,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:46,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:46,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:46,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036269729] [2022-11-20 20:09:46,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036269729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:46,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:46,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:46,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342307424] [2022-11-20 20:09:46,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:46,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:46,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:46,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:46,894 INFO L87 Difference]: Start difference. First operand 2974 states and 11751 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:47,070 INFO L93 Difference]: Finished difference Result 2988 states and 11816 transitions. [2022-11-20 20:09:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:47,083 INFO L225 Difference]: With dead ends: 2988 [2022-11-20 20:09:47,083 INFO L226 Difference]: Without dead ends: 2988 [2022-11-20 20:09:47,083 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 [2022-11-20 20:09:47,084 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:47,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 20:09:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-11-20 20:09:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2975. [2022-11-20 20:09:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2966 states have (on average 3.9629130141604856) internal successors, (11754), 2974 states have internal predecessors, (11754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 11754 transitions. [2022-11-20 20:09:47,148 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 11754 transitions. Word has length 12 [2022-11-20 20:09:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:47,149 INFO L495 AbstractCegarLoop]: Abstraction has 2975 states and 11754 transitions. [2022-11-20 20:09:47,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 11754 transitions. [2022-11-20 20:09:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:47,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:47,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:47,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-20 20:09:47,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:47,351 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1775046560, now seen corresponding path program 3 times [2022-11-20 20:09:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:47,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458790649] [2022-11-20 20:09:47,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:09:47,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:47,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:47,352 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:47,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-20 20:09:47,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:09:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:47,814 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:47,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:48,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:48,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:48,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458790649] [2022-11-20 20:09:48,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458790649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:48,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:48,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:48,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237409462] [2022-11-20 20:09:48,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:48,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:48,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:48,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:48,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:48,142 INFO L87 Difference]: Start difference. First operand 2975 states and 11754 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:48,357 INFO L93 Difference]: Finished difference Result 2988 states and 11802 transitions. [2022-11-20 20:09:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:48,368 INFO L225 Difference]: With dead ends: 2988 [2022-11-20 20:09:48,368 INFO L226 Difference]: Without dead ends: 2988 [2022-11-20 20:09:48,368 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 [2022-11-20 20:09:48,368 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:48,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 20:09:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-11-20 20:09:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2975. [2022-11-20 20:09:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2966 states have (on average 3.9629130141604856) internal successors, (11754), 2974 states have internal predecessors, (11754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 11754 transitions. [2022-11-20 20:09:48,436 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 11754 transitions. Word has length 12 [2022-11-20 20:09:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:48,436 INFO L495 AbstractCegarLoop]: Abstraction has 2975 states and 11754 transitions. [2022-11-20 20:09:48,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 11754 transitions. [2022-11-20 20:09:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:48,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:48,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:48,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-20 20:09:48,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:48,639 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1279145013, now seen corresponding path program 4 times [2022-11-20 20:09:48,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:48,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028010995] [2022-11-20 20:09:48,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:09:48,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:48,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:48,641 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:48,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-20 20:09:48,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:09:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:49,058 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:49,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:09:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:49,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:49,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:49,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028010995] [2022-11-20 20:09:49,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028010995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:49,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:49,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:49,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146574555] [2022-11-20 20:09:49,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:49,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:49,385 INFO L87 Difference]: Start difference. First operand 2975 states and 11754 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:49,586 INFO L93 Difference]: Finished difference Result 2993 states and 11830 transitions. [2022-11-20 20:09:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:49,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:49,596 INFO L225 Difference]: With dead ends: 2993 [2022-11-20 20:09:49,597 INFO L226 Difference]: Without dead ends: 2993 [2022-11-20 20:09:49,597 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 [2022-11-20 20:09:49,597 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:49,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 20:09:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-11-20 20:09:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2977. [2022-11-20 20:09:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2968 states have (on average 3.963274932614555) internal successors, (11763), 2976 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 11763 transitions. [2022-11-20 20:09:49,661 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 11763 transitions. Word has length 12 [2022-11-20 20:09:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:49,662 INFO L495 AbstractCegarLoop]: Abstraction has 2977 states and 11763 transitions. [2022-11-20 20:09:49,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:49,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 11763 transitions. [2022-11-20 20:09:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:49,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:49,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:49,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Ended with exit code 0 [2022-11-20 20:09:49,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:49,866 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:49,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1282511396, now seen corresponding path program 4 times [2022-11-20 20:09:49,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:49,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718584308] [2022-11-20 20:09:49,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:09:49,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:49,867 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:49,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-20 20:09:50,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:09:50,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:50,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:50,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:50,274 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:50,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:09:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:50,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:50,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718584308] [2022-11-20 20:09:50,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718584308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:50,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:50,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362391928] [2022-11-20 20:09:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:50,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:50,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:50,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:50,565 INFO L87 Difference]: Start difference. First operand 2977 states and 11763 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:50,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:50,751 INFO L93 Difference]: Finished difference Result 2994 states and 11823 transitions. [2022-11-20 20:09:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:50,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:50,760 INFO L225 Difference]: With dead ends: 2994 [2022-11-20 20:09:50,760 INFO L226 Difference]: Without dead ends: 2994 [2022-11-20 20:09:50,761 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 [2022-11-20 20:09:50,761 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:50,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 20:09:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2022-11-20 20:09:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2979. [2022-11-20 20:09:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2970 states have (on average 3.963636363636364) internal successors, (11772), 2978 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 11772 transitions. [2022-11-20 20:09:50,820 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 11772 transitions. Word has length 12 [2022-11-20 20:09:50,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:50,820 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 11772 transitions. [2022-11-20 20:09:50,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 11772 transitions. [2022-11-20 20:09:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:50,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:50,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:50,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-20 20:09:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:51,022 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1278770223, now seen corresponding path program 5 times [2022-11-20 20:09:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:51,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328474355] [2022-11-20 20:09:51,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:09:51,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:51,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:51,024 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:51,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-20 20:09:51,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:09:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:51,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:51,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:51,475 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:51,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:51,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:51,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:51,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328474355] [2022-11-20 20:09:51,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328474355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:51,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:51,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:51,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155206058] [2022-11-20 20:09:51,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:51,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:51,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:51,762 INFO L87 Difference]: Start difference. First operand 2979 states and 11772 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:51,963 INFO L93 Difference]: Finished difference Result 2992 states and 11830 transitions. [2022-11-20 20:09:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:51,972 INFO L225 Difference]: With dead ends: 2992 [2022-11-20 20:09:51,972 INFO L226 Difference]: Without dead ends: 2992 [2022-11-20 20:09:51,972 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 [2022-11-20 20:09:51,972 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:51,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:09:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-11-20 20:09:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2978. [2022-11-20 20:09:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2969 states have (on average 3.962950488379926) internal successors, (11766), 2977 states have internal predecessors, (11766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 11766 transitions. [2022-11-20 20:09:52,023 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 11766 transitions. Word has length 12 [2022-11-20 20:09:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:52,023 INFO L495 AbstractCegarLoop]: Abstraction has 2978 states and 11766 transitions. [2022-11-20 20:09:52,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 11766 transitions. [2022-11-20 20:09:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:52,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:52,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:52,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-20 20:09:52,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:52,225 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1278878816, now seen corresponding path program 5 times [2022-11-20 20:09:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103758445] [2022-11-20 20:09:52,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:09:52,226 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 [2022-11-20 20:09:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:52,227 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:52,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-20 20:09:52,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:09:52,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:52,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:52,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:52,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:09:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:53,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:53,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:53,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103758445] [2022-11-20 20:09:53,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103758445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:53,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:53,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:53,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512919217] [2022-11-20 20:09:53,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:53,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:53,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:53,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:53,008 INFO L87 Difference]: Start difference. First operand 2978 states and 11766 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:53,258 INFO L93 Difference]: Finished difference Result 2992 states and 11812 transitions. [2022-11-20 20:09:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:53,269 INFO L225 Difference]: With dead ends: 2992 [2022-11-20 20:09:53,269 INFO L226 Difference]: Without dead ends: 2992 [2022-11-20 20:09:53,269 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 [2022-11-20 20:09:53,269 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:53,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 20:09:53,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-11-20 20:09:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2981. [2022-11-20 20:09:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2972 states have (on average 3.9616419919246297) internal successors, (11774), 2980 states have internal predecessors, (11774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 11774 transitions. [2022-11-20 20:09:53,330 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 11774 transitions. Word has length 12 [2022-11-20 20:09:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:53,330 INFO L495 AbstractCegarLoop]: Abstraction has 2981 states and 11774 transitions. [2022-11-20 20:09:53,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 11774 transitions. [2022-11-20 20:09:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:53,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:53,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:53,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-20 20:09:53,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:53,533 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1252852053, now seen corresponding path program 6 times [2022-11-20 20:09:53,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:53,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677008306] [2022-11-20 20:09:53,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:09:53,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:53,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:53,534 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:53,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-20 20:09:53,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 20:09:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:53,943 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:53,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:54,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:54,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677008306] [2022-11-20 20:09:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677008306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:54,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:54,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:54,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611132196] [2022-11-20 20:09:54,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:54,218 INFO L87 Difference]: Start difference. First operand 2981 states and 11774 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:54,424 INFO L93 Difference]: Finished difference Result 2983 states and 11777 transitions. [2022-11-20 20:09:54,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:54,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:54,434 INFO L225 Difference]: With dead ends: 2983 [2022-11-20 20:09:54,434 INFO L226 Difference]: Without dead ends: 2983 [2022-11-20 20:09:54,435 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 [2022-11-20 20:09:54,435 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:54,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-20 20:09:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-11-20 20:09:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2980. [2022-11-20 20:09:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2971 states have (on average 3.961629081117469) internal successors, (11770), 2979 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 11770 transitions. [2022-11-20 20:09:54,497 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 11770 transitions. Word has length 12 [2022-11-20 20:09:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:54,497 INFO L495 AbstractCegarLoop]: Abstraction has 2980 states and 11770 transitions. [2022-11-20 20:09:54,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 11770 transitions. [2022-11-20 20:09:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:54,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:54,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:54,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Ended with exit code 0 [2022-11-20 20:09:54,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:54,700 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1252960646, now seen corresponding path program 6 times [2022-11-20 20:09:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:54,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251496723] [2022-11-20 20:09:54,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:09:54,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:54,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:54,702 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:54,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-20 20:09:54,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 20:09:54,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:54,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:55,173 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:55,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:09:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:55,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:55,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251496723] [2022-11-20 20:09:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251496723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:55,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:55,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642382195] [2022-11-20 20:09:55,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:55,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:55,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:55,439 INFO L87 Difference]: Start difference. First operand 2980 states and 11770 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:55,619 INFO L93 Difference]: Finished difference Result 3056 states and 12088 transitions. [2022-11-20 20:09:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:55,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:55,628 INFO L225 Difference]: With dead ends: 3056 [2022-11-20 20:09:55,628 INFO L226 Difference]: Without dead ends: 3056 [2022-11-20 20:09:55,628 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 [2022-11-20 20:09:55,628 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:55,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 20:09:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-11-20 20:09:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2977. [2022-11-20 20:09:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2968 states have (on average 3.9626010781671157) internal successors, (11761), 2976 states have internal predecessors, (11761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 11761 transitions. [2022-11-20 20:09:55,700 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 11761 transitions. Word has length 12 [2022-11-20 20:09:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:55,701 INFO L495 AbstractCegarLoop]: Abstraction has 2977 states and 11761 transitions. [2022-11-20 20:09:55,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 11761 transitions. [2022-11-20 20:09:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:55,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:55,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:55,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-20 20:09:55,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:55,903 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1257528837, now seen corresponding path program 1 times [2022-11-20 20:09:55,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:55,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597285495] [2022-11-20 20:09:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:55,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:55,905 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:55,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-20 20:09:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:09:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:56,423 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:56,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:56,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:56,640 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:56,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597285495] [2022-11-20 20:09:56,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597285495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:56,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:56,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:09:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330515263] [2022-11-20 20:09:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:09:56,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:09:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:09:56,641 INFO L87 Difference]: Start difference. First operand 2977 states and 11761 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:56,865 INFO L93 Difference]: Finished difference Result 2983 states and 11780 transitions. [2022-11-20 20:09:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:09:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:56,875 INFO L225 Difference]: With dead ends: 2983 [2022-11-20 20:09:56,875 INFO L226 Difference]: Without dead ends: 2983 [2022-11-20 20:09:56,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:09:56,875 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:56,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-20 20:09:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2022-11-20 20:09:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2981. [2022-11-20 20:09:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2972 states have (on average 3.9613055181695827) internal successors, (11773), 2980 states have internal predecessors, (11773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 11773 transitions. [2022-11-20 20:09:56,928 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 11773 transitions. Word has length 12 [2022-11-20 20:09:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:56,928 INFO L495 AbstractCegarLoop]: Abstraction has 2981 states and 11773 transitions. [2022-11-20 20:09:56,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 11773 transitions. [2022-11-20 20:09:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:56,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:56,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:56,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-20 20:09:57,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:57,130 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:57,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1421081427, now seen corresponding path program 2 times [2022-11-20 20:09:57,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:57,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678080244] [2022-11-20 20:09:57,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:09:57,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:57,132 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:57,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-20 20:09:57,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:09:57,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:09:57,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:57,668 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:57,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:09:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:09:57,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:57,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:57,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678080244] [2022-11-20 20:09:57,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678080244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:57,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:57,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:09:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321546493] [2022-11-20 20:09:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:57,872 INFO L87 Difference]: Start difference. First operand 2981 states and 11773 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:09:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:58,112 INFO L93 Difference]: Finished difference Result 3033 states and 11913 transitions. [2022-11-20 20:09:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:58,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2022-11-20 20:09:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:58,126 INFO L225 Difference]: With dead ends: 3033 [2022-11-20 20:09:58,126 INFO L226 Difference]: Without dead ends: 3029 [2022-11-20 20:09:58,126 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 [2022-11-20 20:09:58,127 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:58,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-11-20 20:09:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-11-20 20:09:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 3020. [2022-11-20 20:09:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3010 states have (on average 3.949501661129568) internal successors, (11888), 3019 states have internal predecessors, (11888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 11888 transitions. [2022-11-20 20:09:58,216 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 11888 transitions. Word has length 12 [2022-11-20 20:09:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:58,217 INFO L495 AbstractCegarLoop]: Abstraction has 3020 states and 11888 transitions. [2022-11-20 20:09:58,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:09:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 11888 transitions. [2022-11-20 20:09:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:58,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:58,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:58,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-11-20 20:09:58,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:58,419 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash -362576776, now seen corresponding path program 1 times [2022-11-20 20:09:58,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:58,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687108524] [2022-11-20 20:09:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:58,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:58,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:58,420 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:58,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-20 20:09:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:58,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:58,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:58,847 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:09:58,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:09:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:09:59,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:09:59,156 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:09:59,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687108524] [2022-11-20 20:09:59,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687108524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:59,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:59,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:09:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081591661] [2022-11-20 20:09:59,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:09:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:09:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:09:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:09:59,158 INFO L87 Difference]: Start difference. First operand 3020 states and 11888 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:59,350 INFO L93 Difference]: Finished difference Result 3077 states and 12132 transitions. [2022-11-20 20:09:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:09:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:09:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:59,365 INFO L225 Difference]: With dead ends: 3077 [2022-11-20 20:09:59,365 INFO L226 Difference]: Without dead ends: 3077 [2022-11-20 20:09:59,365 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 [2022-11-20 20:09:59,366 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:59,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 20:09:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2022-11-20 20:09:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 3026. [2022-11-20 20:09:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3016 states have (on average 3.9492705570291777) internal successors, (11911), 3025 states have internal predecessors, (11911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 11911 transitions. [2022-11-20 20:09:59,439 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 11911 transitions. Word has length 12 [2022-11-20 20:09:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:59,440 INFO L495 AbstractCegarLoop]: Abstraction has 3026 states and 11911 transitions. [2022-11-20 20:09:59,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:09:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 11911 transitions. [2022-11-20 20:09:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:09:59,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:59,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:09:59,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:59,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:59,655 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:09:59,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:59,655 INFO L85 PathProgramCache]: Analyzing trace with hash -362426116, now seen corresponding path program 2 times [2022-11-20 20:09:59,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:09:59,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900893905] [2022-11-20 20:09:59,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:09:59,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:09:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:09:59,656 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:09:59,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-20 20:09:59,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:09:59,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:09:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:00,082 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:00,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:10:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:00,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:00,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900893905] [2022-11-20 20:10:00,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900893905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:00,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:00,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:10:00,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816503183] [2022-11-20 20:10:00,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:00,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:00,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:00,357 INFO L87 Difference]: Start difference. First operand 3026 states and 11911 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:00,532 INFO L93 Difference]: Finished difference Result 3098 states and 12199 transitions. [2022-11-20 20:10:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:10:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:00,545 INFO L225 Difference]: With dead ends: 3098 [2022-11-20 20:10:00,545 INFO L226 Difference]: Without dead ends: 3098 [2022-11-20 20:10:00,545 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 [2022-11-20 20:10:00,546 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:00,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 20:10:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2022-11-20 20:10:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 3019. [2022-11-20 20:10:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3009 states have (on average 3.9538052509139248) internal successors, (11897), 3018 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 11897 transitions. [2022-11-20 20:10:00,645 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 11897 transitions. Word has length 12 [2022-11-20 20:10:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:00,645 INFO L495 AbstractCegarLoop]: Abstraction has 3019 states and 11897 transitions. [2022-11-20 20:10:00,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 11897 transitions. [2022-11-20 20:10:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:10:00,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:00,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:10:00,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Forceful destruction successful, exit code 0 [2022-11-20 20:10:00,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:00,848 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash -366209356, now seen corresponding path program 3 times [2022-11-20 20:10:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:00,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278680441] [2022-11-20 20:10:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:10:00,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:00,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:00,851 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:00,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-11-20 20:10:01,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:10:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:01,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:10:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:01,297 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:01,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:10:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:01,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:01,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278680441] [2022-11-20 20:10:01,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278680441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:01,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:01,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:10:01,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484175268] [2022-11-20 20:10:01,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:01,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:01,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:01,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:01,559 INFO L87 Difference]: Start difference. First operand 3019 states and 11897 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:01,723 INFO L93 Difference]: Finished difference Result 3076 states and 12148 transitions. [2022-11-20 20:10:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:01,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:10:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:01,735 INFO L225 Difference]: With dead ends: 3076 [2022-11-20 20:10:01,736 INFO L226 Difference]: Without dead ends: 3076 [2022-11-20 20:10:01,736 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 [2022-11-20 20:10:01,736 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:01,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 20:10:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2022-11-20 20:10:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3025. [2022-11-20 20:10:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3015 states have (on average 3.9545605306799336) internal successors, (11923), 3024 states have internal predecessors, (11923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 11923 transitions. [2022-11-20 20:10:01,815 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 11923 transitions. Word has length 12 [2022-11-20 20:10:01,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:01,815 INFO L495 AbstractCegarLoop]: Abstraction has 3025 states and 11923 transitions. [2022-11-20 20:10:01,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 11923 transitions. [2022-11-20 20:10:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:10:01,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:01,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:10:01,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Forceful destruction successful, exit code 0 [2022-11-20 20:10:02,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:02,030 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash -361505416, now seen corresponding path program 4 times [2022-11-20 20:10:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:02,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491265542] [2022-11-20 20:10:02,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:10:02,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:02,032 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:02,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-20 20:10:02,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:10:02,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:10:02,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:02,521 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:02,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:10:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:02,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:02,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491265542] [2022-11-20 20:10:02,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491265542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:02,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:02,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:10:02,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663614068] [2022-11-20 20:10:02,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:02,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:02,854 INFO L87 Difference]: Start difference. First operand 3025 states and 11923 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:03,049 INFO L93 Difference]: Finished difference Result 3113 states and 12289 transitions. [2022-11-20 20:10:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:03,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:10:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:03,063 INFO L225 Difference]: With dead ends: 3113 [2022-11-20 20:10:03,063 INFO L226 Difference]: Without dead ends: 3113 [2022-11-20 20:10:03,063 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 [2022-11-20 20:10:03,064 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:03,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 20:10:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2022-11-20 20:10:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 3018. [2022-11-20 20:10:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 3008 states have (on average 3.956781914893617) internal successors, (11902), 3017 states have internal predecessors, (11902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 11902 transitions. [2022-11-20 20:10:03,193 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 11902 transitions. Word has length 12 [2022-11-20 20:10:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:03,194 INFO L495 AbstractCegarLoop]: Abstraction has 3018 states and 11902 transitions. [2022-11-20 20:10:03,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 11902 transitions. [2022-11-20 20:10:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:10:03,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:03,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:10:03,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Forceful destruction successful, exit code 0 [2022-11-20 20:10:03,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:03,412 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash -261960076, now seen corresponding path program 5 times [2022-11-20 20:10:03,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:03,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586816830] [2022-11-20 20:10:03,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:10:03,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:03,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:03,414 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:03,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-20 20:10:03,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:10:03,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:10:03,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:03,835 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:03,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:10:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:04,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:04,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:04,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586816830] [2022-11-20 20:10:04,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586816830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:04,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:04,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:10:04,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285512161] [2022-11-20 20:10:04,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:04,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:04,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:04,142 INFO L87 Difference]: Start difference. First operand 3018 states and 11902 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:04,369 INFO L93 Difference]: Finished difference Result 3161 states and 12520 transitions. [2022-11-20 20:10:04,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:04,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:10:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:04,380 INFO L225 Difference]: With dead ends: 3161 [2022-11-20 20:10:04,381 INFO L226 Difference]: Without dead ends: 3161 [2022-11-20 20:10:04,381 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 [2022-11-20 20:10:04,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:04,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-20 20:10:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2022-11-20 20:10:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3018. [2022-11-20 20:10:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3018 states, 3008 states have (on average 3.956781914893617) internal successors, (11902), 3017 states have internal predecessors, (11902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 11902 transitions. [2022-11-20 20:10:04,444 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 11902 transitions. Word has length 12 [2022-11-20 20:10:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:04,444 INFO L495 AbstractCegarLoop]: Abstraction has 3018 states and 11902 transitions. [2022-11-20 20:10:04,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 11902 transitions. [2022-11-20 20:10:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:10:04,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:04,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:10:04,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Ended with exit code 0 [2022-11-20 20:10:04,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:04,647 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:04,647 INFO L85 PathProgramCache]: Analyzing trace with hash -261871168, now seen corresponding path program 1 times [2022-11-20 20:10:04,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:04,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638685503] [2022-11-20 20:10:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:10:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:04,649 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:04,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-20 20:10:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:10:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:10:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:05,104 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:05,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:10:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:05,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:05,292 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638685503] [2022-11-20 20:10:05,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638685503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:05,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:05,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:10:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633997119] [2022-11-20 20:10:05,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:05,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:05,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:05,293 INFO L87 Difference]: Start difference. First operand 3018 states and 11902 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:10:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:05,511 INFO L93 Difference]: Finished difference Result 3021 states and 11909 transitions. [2022-11-20 20:10:05,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2022-11-20 20:10:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:05,520 INFO L225 Difference]: With dead ends: 3021 [2022-11-20 20:10:05,520 INFO L226 Difference]: Without dead ends: 3021 [2022-11-20 20:10:05,521 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 [2022-11-20 20:10:05,521 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:05,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 20:10:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2022-11-20 20:10:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 3021. [2022-11-20 20:10:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3011 states have (on average 3.955164397210229) internal successors, (11909), 3020 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 11909 transitions. [2022-11-20 20:10:05,598 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 11909 transitions. Word has length 12 [2022-11-20 20:10:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:05,598 INFO L495 AbstractCegarLoop]: Abstraction has 3021 states and 11909 transitions. [2022-11-20 20:10:05,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:10:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 11909 transitions. [2022-11-20 20:10:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:10:05,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:05,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:10:05,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Ended with exit code 0 [2022-11-20 20:10:05,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:05,801 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:05,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash -377827846, now seen corresponding path program 6 times [2022-11-20 20:10:05,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:05,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644194232] [2022-11-20 20:10:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:10:05,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:05,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:05,804 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:05,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-20 20:10:06,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 20:10:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:10:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:06,321 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:06,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:10:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:06,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:06,614 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:06,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644194232] [2022-11-20 20:10:06,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644194232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:06,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:06,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:10:06,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508001566] [2022-11-20 20:10:06,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:06,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:06,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:06,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:06,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:06,616 INFO L87 Difference]: Start difference. First operand 3021 states and 11909 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:06,794 INFO L93 Difference]: Finished difference Result 3020 states and 11898 transitions. [2022-11-20 20:10:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:06,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:10:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:06,803 INFO L225 Difference]: With dead ends: 3020 [2022-11-20 20:10:06,803 INFO L226 Difference]: Without dead ends: 3020 [2022-11-20 20:10:06,803 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 [2022-11-20 20:10:06,804 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:06,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:10:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2022-11-20 20:10:06,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2966. [2022-11-20 20:10:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2956 states have (on average 3.9445196211096074) internal successors, (11660), 2965 states have internal predecessors, (11660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 11660 transitions. [2022-11-20 20:10:06,857 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 11660 transitions. Word has length 12 [2022-11-20 20:10:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:06,858 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 11660 transitions. [2022-11-20 20:10:06,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 11660 transitions. [2022-11-20 20:10:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:10:06,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:06,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:10:06,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-20 20:10:07,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:07,060 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash -374481148, now seen corresponding path program 2 times [2022-11-20 20:10:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768710943] [2022-11-20 20:10:07,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:10:07,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:07,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:07,062 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:07,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-20 20:10:07,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:10:07,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:07,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:10:07,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:07,595 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:07,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:10:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:07,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:07,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:07,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768710943] [2022-11-20 20:10:07,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768710943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:07,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:07,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:10:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290450812] [2022-11-20 20:10:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:07,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:07,843 INFO L87 Difference]: Start difference. First operand 2966 states and 11660 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:10:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:08,095 INFO L93 Difference]: Finished difference Result 2966 states and 11654 transitions. [2022-11-20 20:10:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2022-11-20 20:10:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:08,105 INFO L225 Difference]: With dead ends: 2966 [2022-11-20 20:10:08,105 INFO L226 Difference]: Without dead ends: 2966 [2022-11-20 20:10:08,105 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 [2022-11-20 20:10:08,105 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:08,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 20:10:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2966 states. [2022-11-20 20:10:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2966 to 2963. [2022-11-20 20:10:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2953 states have (on average 3.943108703013884) internal successors, (11644), 2962 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 11644 transitions. [2022-11-20 20:10:08,220 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 11644 transitions. Word has length 12 [2022-11-20 20:10:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:08,220 INFO L495 AbstractCegarLoop]: Abstraction has 2963 states and 11644 transitions. [2022-11-20 20:10:08,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:10:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 11644 transitions. [2022-11-20 20:10:08,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:10:08,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:08,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:10:08,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2022-11-20 20:10:08,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:08,435 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1177944418, now seen corresponding path program 3 times [2022-11-20 20:10:08,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728116845] [2022-11-20 20:10:08,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:10:08,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:08,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:08,437 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:08,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-20 20:10:08,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:10:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:08,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:10:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:08,954 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:08,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:10:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:09,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:10:09,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728116845] [2022-11-20 20:10:09,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728116845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:10:09,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:10:09,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:10:09,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708641039] [2022-11-20 20:10:09,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:10:09,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:10:09,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:10:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:10:09,192 INFO L87 Difference]: Start difference. First operand 2963 states and 11644 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:10:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:09,467 INFO L93 Difference]: Finished difference Result 2944 states and 11580 transitions. [2022-11-20 20:10:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:10:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 [2022-11-20 20:10:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:09,477 INFO L225 Difference]: With dead ends: 2944 [2022-11-20 20:10:09,477 INFO L226 Difference]: Without dead ends: 2944 [2022-11-20 20:10:09,478 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 [2022-11-20 20:10:09,478 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:09,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-20 20:10:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2022-11-20 20:10:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2916. [2022-11-20 20:10:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2906 states have (on average 3.9521679284239504) internal successors, (11485), 2915 states have internal predecessors, (11485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:10:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 11485 transitions. [2022-11-20 20:10:09,539 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 11485 transitions. Word has length 12 [2022-11-20 20:10:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:09,539 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 11485 transitions. [2022-11-20 20:10:09,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-11-20 20:10:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 11485 transitions. [2022-11-20 20:10:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:10:09,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:09,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 20:10:09,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Ended with exit code 0 [2022-11-20 20:10:09,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:09,742 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:10:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash -145061101, now seen corresponding path program 3 times [2022-11-20 20:10:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:10:09,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149722690] [2022-11-20 20:10:09,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:10:09,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:10:09,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:10:09,745 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:10:09,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-20 20:10:10,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:10:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:10,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:10:10,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:10,332 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:10,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:10:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:10:10,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:10:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:10:12,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:10:12,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149722690] [2022-11-20 20:10:12,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149722690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:10:12,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540366717] [2022-11-20 20:10:12,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:10:12,132 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:10:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:10:12,133 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:10:12,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (156)] Waiting until timeout for monitored process [2022-11-20 20:10:13,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:10:13,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:10:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:13,222 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:10:13,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:10:14,137 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 [2022-11-20 20:10:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:14,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:10:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:17,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540366717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:10:17,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390168939] [2022-11-20 20:10:17,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:10:17,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:10:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:10:17,344 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:10:17,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-11-20 20:10:17,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:10:17,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:10:17,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:10:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:19,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:10:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:10:21,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390168939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:10:21,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:10:21,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 56 [2022-11-20 20:10:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871929940] [2022-11-20 20:10:21,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:10:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 20:10:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:10:21,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 20:10:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 20:10:21,112 INFO L87 Difference]: Start difference. First operand 2916 states and 11485 transitions. Second operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:11:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:12,835 INFO L93 Difference]: Finished difference Result 8782 states and 31925 transitions. [2022-11-20 20:11:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 20:11:12,837 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:11:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:12,860 INFO L225 Difference]: With dead ends: 8782 [2022-11-20 20:11:12,860 INFO L226 Difference]: Without dead ends: 8782 [2022-11-20 20:11:12,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=2539, Invalid=11267, Unknown=0, NotChecked=0, Total=13806 [2022-11-20 20:11:12,861 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 6561 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 11626 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6561 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 11806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 11626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:12,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6561 Valid, 1581 Invalid, 11806 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [180 Valid, 11626 Invalid, 0 Unknown, 0 Unchecked, 27.5s Time] [2022-11-20 20:11:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8782 states. [2022-11-20 20:11:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8782 to 4216. [2022-11-20 20:11:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4216 states, 4206 states have (on average 4.057774607703281) internal successors, (17067), 4215 states have internal predecessors, (17067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:11:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 17067 transitions. [2022-11-20 20:11:12,974 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 17067 transitions. Word has length 13 [2022-11-20 20:11:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:12,974 INFO L495 AbstractCegarLoop]: Abstraction has 4216 states and 17067 transitions. [2022-11-20 20:11:12,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:11:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 17067 transitions. [2022-11-20 20:11:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:11:12,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:12,976 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:11:12,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Ended with exit code 0 [2022-11-20 20:11:13,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-11-20 20:11:13,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (156)] Forceful destruction successful, exit code 0 [2022-11-20 20:11:13,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:11:13,577 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:11:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1580960309, now seen corresponding path program 1 times [2022-11-20 20:11:13,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:11:13,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83498924] [2022-11-20 20:11:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:13,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:11:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:11:13,580 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:11:13,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-20 20:11:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:13,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:11:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:14,076 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:11:14,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:11:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:11:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:11:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:11:17,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:11:17,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83498924] [2022-11-20 20:11:17,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83498924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:11:17,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1559674064] [2022-11-20 20:11:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:17,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:11:17,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:11:17,461 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:11:17,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (159)] Waiting until timeout for monitored process [2022-11-20 20:11:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:11:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:18,307 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:11:18,307 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:11:18,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:11:18,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:11:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:11:22,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1559674064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:11:22,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452699542] [2022-11-20 20:11:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:22,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:22,605 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:22,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-11-20 20:11:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 20:11:22,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:23,111 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:11:23,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:11:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:11:23,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:11:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:11:25,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452699542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:11:25,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:11:25,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 25 [2022-11-20 20:11:25,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563578861] [2022-11-20 20:11:25,694 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:11:25,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:11:25,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:11:25,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:11:25,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:11:25,695 INFO L87 Difference]: Start difference. First operand 4216 states and 17067 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:03,209 INFO L93 Difference]: Finished difference Result 7144 states and 27502 transitions. [2022-11-20 20:12:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 20:12:03,211 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:12:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:03,232 INFO L225 Difference]: With dead ends: 7144 [2022-11-20 20:12:03,233 INFO L226 Difference]: Without dead ends: 7144 [2022-11-20 20:12:03,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=832, Invalid=2828, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 20:12:03,233 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1171 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1153 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:12:03,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1171 Valid, 258 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1312 Invalid, 0 Unknown, 1153 Unchecked, 8.0s Time] [2022-11-20 20:12:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2022-11-20 20:12:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 4964. [2022-11-20 20:12:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4954 states have (on average 4.081146548243844) internal successors, (20218), 4963 states have internal predecessors, (20218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 20218 transitions. [2022-11-20 20:12:03,379 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 20218 transitions. Word has length 13 [2022-11-20 20:12:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:03,379 INFO L495 AbstractCegarLoop]: Abstraction has 4964 states and 20218 transitions. [2022-11-20 20:12:03,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 20218 transitions. [2022-11-20 20:12:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:12:03,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:03,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:03,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (159)] Forceful destruction successful, exit code 0 [2022-11-20 20:12:03,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Forceful destruction successful, exit code 0 [2022-11-20 20:12:03,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-11-20 20:12:03,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:03,982 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:12:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1226932846, now seen corresponding path program 1 times [2022-11-20 20:12:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:12:03,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435696236] [2022-11-20 20:12:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:03,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:12:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:12:03,984 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:12:03,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-20 20:12:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:12:04,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:12:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:04,554 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:12:04,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:12:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:12:04,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:12:05,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:12:05,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435696236] [2022-11-20 20:12:05,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435696236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:05,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362234434] [2022-11-20 20:12:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:05,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:05,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:12:05,768 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:12:05,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (162)] Waiting until timeout for monitored process [2022-11-20 20:12:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:12:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:12:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:06,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:07,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [362234434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:07,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153771375] [2022-11-20 20:12:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:07,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:07,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:07,376 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:07,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-11-20 20:12:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:12:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:12:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:08,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:08,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153771375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:08,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:12:08,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 8, 8] total 29 [2022-11-20 20:12:08,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050324199] [2022-11-20 20:12:08,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:08,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:12:08,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:12:08,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:12:08,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:12:08,667 INFO L87 Difference]: Start difference. First operand 4964 states and 20218 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:12,874 INFO L93 Difference]: Finished difference Result 5131 states and 20811 transitions. [2022-11-20 20:12:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 20:12:12,874 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:12:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:12,886 INFO L225 Difference]: With dead ends: 5131 [2022-11-20 20:12:12,886 INFO L226 Difference]: Without dead ends: 5131 [2022-11-20 20:12:12,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=347, Invalid=1815, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 20:12:12,887 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:12:12,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 77 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 268 Invalid, 0 Unknown, 73 Unchecked, 1.2s Time] [2022-11-20 20:12:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2022-11-20 20:12:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 4997. [2022-11-20 20:12:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4987 states have (on average 4.0691798676559054) internal successors, (20293), 4996 states have internal predecessors, (20293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 20293 transitions. [2022-11-20 20:12:12,973 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 20293 transitions. Word has length 13 [2022-11-20 20:12:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:12,973 INFO L495 AbstractCegarLoop]: Abstraction has 4997 states and 20293 transitions. [2022-11-20 20:12:12,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 20293 transitions. [2022-11-20 20:12:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:12:12,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:12,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:12,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-11-20 20:12:13,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Ended with exit code 0 [2022-11-20 20:12:13,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (162)] Forceful destruction successful, exit code 0 [2022-11-20 20:12:13,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:13,576 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:12:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1927040324, now seen corresponding path program 2 times [2022-11-20 20:12:13,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:12:13,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74339370] [2022-11-20 20:12:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:12:13,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:12:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:12:13,578 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:12:13,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-20 20:12:13,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:12:13,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:13,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:12:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:14,089 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:12:14,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:12:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:14,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:15,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:12:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74339370] [2022-11-20 20:12:15,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74339370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:15,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [519648997] [2022-11-20 20:12:15,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:12:15,001 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:12:15,002 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:12:15,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (165)] Waiting until timeout for monitored process [2022-11-20 20:12:15,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:12:15,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:12:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:16,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:16,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [519648997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128749796] [2022-11-20 20:12:16,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:12:16,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:16,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:16,443 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:16,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-11-20 20:12:16,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:12:16,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:12:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:17,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:18,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128749796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:18,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:12:18,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 8, 8] total 31 [2022-11-20 20:12:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382659741] [2022-11-20 20:12:18,174 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 20:12:18,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:12:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 20:12:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:12:18,175 INFO L87 Difference]: Start difference. First operand 4997 states and 20293 transitions. Second operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:24,457 INFO L93 Difference]: Finished difference Result 5157 states and 20893 transitions. [2022-11-20 20:12:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 20:12:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:12:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:24,472 INFO L225 Difference]: With dead ends: 5157 [2022-11-20 20:12:24,472 INFO L226 Difference]: Without dead ends: 5157 [2022-11-20 20:12:24,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=474, Invalid=2388, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 20:12:24,472 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:12:24,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 100 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 312 Invalid, 0 Unknown, 86 Unchecked, 1.3s Time] [2022-11-20 20:12:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2022-11-20 20:12:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 5018. [2022-11-20 20:12:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5008 states have (on average 4.067891373801917) internal successors, (20372), 5017 states have internal predecessors, (20372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 20372 transitions. [2022-11-20 20:12:24,627 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 20372 transitions. Word has length 13 [2022-11-20 20:12:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:24,628 INFO L495 AbstractCegarLoop]: Abstraction has 5018 states and 20372 transitions. [2022-11-20 20:12:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 20372 transitions. [2022-11-20 20:12:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:12:24,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:24,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:24,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-11-20 20:12:24,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Ended with exit code 0 [2022-11-20 20:12:25,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (165)] Ended with exit code 0 [2022-11-20 20:12:25,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:25,231 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:12:25,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1927576562, now seen corresponding path program 1 times [2022-11-20 20:12:25,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:12:25,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582644831] [2022-11-20 20:12:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:25,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:12:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:12:25,233 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:12:25,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-20 20:12:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:12:25,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:12:25,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:25,739 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:12:25,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:12:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:26,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:26,992 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:12:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582644831] [2022-11-20 20:12:26,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582644831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [756141849] [2022-11-20 20:12:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:26,993 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:26,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:12:26,994 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:12:26,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (168)] Waiting until timeout for monitored process [2022-11-20 20:12:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:12:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:12:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:28,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:28,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [756141849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:28,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117172134] [2022-11-20 20:12:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:12:28,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:28,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:28,556 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:28,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-11-20 20:12:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:12:29,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:12:29,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:29,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:29,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117172134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:29,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:12:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:12:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116626894] [2022-11-20 20:12:29,216 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:29,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:12:29,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:12:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:12:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:12:29,217 INFO L87 Difference]: Start difference. First operand 5018 states and 20372 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:31,717 INFO L93 Difference]: Finished difference Result 5617 states and 22979 transitions. [2022-11-20 20:12:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:12:31,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:12:31,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:31,735 INFO L225 Difference]: With dead ends: 5617 [2022-11-20 20:12:31,735 INFO L226 Difference]: Without dead ends: 5617 [2022-11-20 20:12:31,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:12:31,735 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:12:31,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 82 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 290 Unchecked, 1.4s Time] [2022-11-20 20:12:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2022-11-20 20:12:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 5171. [2022-11-20 20:12:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5161 states have (on average 4.083123425692695) internal successors, (21073), 5170 states have internal predecessors, (21073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 21073 transitions. [2022-11-20 20:12:31,857 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 21073 transitions. Word has length 13 [2022-11-20 20:12:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:31,857 INFO L495 AbstractCegarLoop]: Abstraction has 5171 states and 21073 transitions. [2022-11-20 20:12:31,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 21073 transitions. [2022-11-20 20:12:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:12:31,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:31,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:31,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-11-20 20:12:32,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Ended with exit code 0 [2022-11-20 20:12:32,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (168)] Ended with exit code 0 [2022-11-20 20:12:32,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:32,461 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:12:32,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:32,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1925471414, now seen corresponding path program 3 times [2022-11-20 20:12:32,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:12:32,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118624768] [2022-11-20 20:12:32,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:12:32,462 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 [2022-11-20 20:12:32,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:12:32,463 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:12:32,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-20 20:12:32,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:12:32,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:32,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:12:32,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:33,022 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:12:33,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:12:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:33,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:34,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:12:34,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118624768] [2022-11-20 20:12:34,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118624768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:34,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614275465] [2022-11-20 20:12:34,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:12:34,137 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:34,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:12:34,138 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:12:34,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (171)] Waiting until timeout for monitored process [2022-11-20 20:12:34,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:12:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:12:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:35,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:35,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614275465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548347898] [2022-11-20 20:12:35,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:12:35,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:35,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:35,683 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:35,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-11-20 20:12:36,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:12:36,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:12:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:36,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:37,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548347898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:37,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:12:37,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 8, 8] total 33 [2022-11-20 20:12:37,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672305295] [2022-11-20 20:12:37,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 20:12:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:12:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 20:12:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:12:37,667 INFO L87 Difference]: Start difference. First operand 5171 states and 21073 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:43,775 INFO L93 Difference]: Finished difference Result 5373 states and 21812 transitions. [2022-11-20 20:12:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 20:12:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:12:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:43,794 INFO L225 Difference]: With dead ends: 5373 [2022-11-20 20:12:43,794 INFO L226 Difference]: Without dead ends: 5373 [2022-11-20 20:12:43,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=631, Invalid=3275, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 20:12:43,795 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:12:43,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 86 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 345 Invalid, 0 Unknown, 89 Unchecked, 1.5s Time] [2022-11-20 20:12:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2022-11-20 20:12:43,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 5197. [2022-11-20 20:12:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 5187 states have (on average 4.08752650857914) internal successors, (21202), 5196 states have internal predecessors, (21202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 21202 transitions. [2022-11-20 20:12:43,949 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 21202 transitions. Word has length 13 [2022-11-20 20:12:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:43,950 INFO L495 AbstractCegarLoop]: Abstraction has 5197 states and 21202 transitions. [2022-11-20 20:12:43,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 21202 transitions. [2022-11-20 20:12:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:12:43,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:43,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:43,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Ended with exit code 0 [2022-11-20 20:12:44,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (171)] Ended with exit code 0 [2022-11-20 20:12:44,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-11-20 20:12:44,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:44,553 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:12:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:44,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1925471972, now seen corresponding path program 2 times [2022-11-20 20:12:44,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:12:44,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881395470] [2022-11-20 20:12:44,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:12:44,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:12:44,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:12:44,555 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:12:44,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-20 20:12:44,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:12:44,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:44,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:12:44,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:45,150 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:12:45,150 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:12:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:45,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:46,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:12:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881395470] [2022-11-20 20:12:46,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881395470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1374200068] [2022-11-20 20:12:46,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:12:46,182 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:46,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:12:46,183 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:12:46,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (174)] Waiting until timeout for monitored process [2022-11-20 20:12:46,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:12:46,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:46,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:12:46,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:47,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:47,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1374200068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:47,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800815971] [2022-11-20 20:12:47,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:12:47,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:47,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:47,989 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:47,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-11-20 20:12:48,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:12:48,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:48,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:12:48,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:48,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:49,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800815971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:49,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:12:49,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 7, 6, 6] total 28 [2022-11-20 20:12:49,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490942436] [2022-11-20 20:12:49,081 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:49,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:12:49,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:12:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:12:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:12:49,082 INFO L87 Difference]: Start difference. First operand 5197 states and 21202 transitions. Second operand has 30 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:12:52,540 INFO L93 Difference]: Finished difference Result 5848 states and 24082 transitions. [2022-11-20 20:12:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:12:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:12:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:12:52,560 INFO L225 Difference]: With dead ends: 5848 [2022-11-20 20:12:52,560 INFO L226 Difference]: Without dead ends: 5848 [2022-11-20 20:12:52,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 20:12:52,561 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 143 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:12:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 94 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 423 Invalid, 0 Unknown, 221 Unchecked, 1.7s Time] [2022-11-20 20:12:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2022-11-20 20:12:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5261. [2022-11-20 20:12:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5251 states have (on average 4.097886116930108) internal successors, (21518), 5260 states have internal predecessors, (21518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 21518 transitions. [2022-11-20 20:12:52,690 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 21518 transitions. Word has length 13 [2022-11-20 20:12:52,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:12:52,690 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 21518 transitions. [2022-11-20 20:12:52,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:12:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 21518 transitions. [2022-11-20 20:12:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:12:52,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:12:52,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:12:52,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (174)] Ended with exit code 0 [2022-11-20 20:12:52,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Ended with exit code 0 [2022-11-20 20:12:53,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-11-20 20:12:53,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:53,294 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:12:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:12:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2086660502, now seen corresponding path program 3 times [2022-11-20 20:12:53,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:12:53,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109842110] [2022-11-20 20:12:53,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:12:53,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:12:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:12:53,296 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:12:53,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-20 20:12:53,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:12:53,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:53,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:12:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:53,882 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:12:53,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:12:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:12:55,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:12:55,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109842110] [2022-11-20 20:12:55,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109842110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:55,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400340121] [2022-11-20 20:12:55,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:12:55,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:12:55,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:12:55,081 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:12:55,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (177)] Waiting until timeout for monitored process [2022-11-20 20:12:55,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:12:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:55,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:12:55,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:56,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:56,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [400340121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967389977] [2022-11-20 20:12:56,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:12:56,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:12:56,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:12:56,811 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:12:56,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-11-20 20:12:57,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:12:57,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:12:57,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:12:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:12:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:57,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:12:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:12:57,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967389977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:12:57,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:12:57,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 7, 6, 6] total 28 [2022-11-20 20:12:57,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292961296] [2022-11-20 20:12:57,977 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:12:57,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:12:57,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:12:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:12:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:12:57,979 INFO L87 Difference]: Start difference. First operand 5261 states and 21518 transitions. Second operand has 30 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:13:00,486 INFO L93 Difference]: Finished difference Result 5542 states and 22720 transitions. [2022-11-20 20:13:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:13:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:13:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:13:00,502 INFO L225 Difference]: With dead ends: 5542 [2022-11-20 20:13:00,503 INFO L226 Difference]: Without dead ends: 5542 [2022-11-20 20:13:00,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:13:00,503 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:13:00,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 71 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 219 Invalid, 0 Unknown, 25 Unchecked, 1.0s Time] [2022-11-20 20:13:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2022-11-20 20:13:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 5265. [2022-11-20 20:13:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5265 states, 5255 states have (on average 4.097240723120837) internal successors, (21531), 5264 states have internal predecessors, (21531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5265 states to 5265 states and 21531 transitions. [2022-11-20 20:13:00,605 INFO L78 Accepts]: Start accepts. Automaton has 5265 states and 21531 transitions. Word has length 13 [2022-11-20 20:13:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:13:00,606 INFO L495 AbstractCegarLoop]: Abstraction has 5265 states and 21531 transitions. [2022-11-20 20:13:00,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5265 states and 21531 transitions. [2022-11-20 20:13:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:13:00,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:13:00,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:13:00,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Ended with exit code 0 [2022-11-20 20:13:00,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (177)] Ended with exit code 0 [2022-11-20 20:13:01,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-11-20 20:13:01,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:13:01,209 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:13:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:13:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash -496662684, now seen corresponding path program 4 times [2022-11-20 20:13:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:13:01,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562957705] [2022-11-20 20:13:01,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:13:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:13:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:13:01,211 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:13:01,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-20 20:13:01,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:13:01,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:01,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:13:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:01,711 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:13:01,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:13:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:02,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:02,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:13:02,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562957705] [2022-11-20 20:13:02,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562957705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:02,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1659096647] [2022-11-20 20:13:02,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:13:02,921 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:13:02,922 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:13:02,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (180)] Waiting until timeout for monitored process [2022-11-20 20:13:03,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:13:03,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:13:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:04,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:04,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1659096647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775988691] [2022-11-20 20:13:04,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:13:04,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:13:04,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:13:04,665 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:13:04,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-11-20 20:13:05,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:13:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:13:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:05,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775988691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:05,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:13:05,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:13:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927657589] [2022-11-20 20:13:05,292 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:13:05,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:13:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:13:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:13:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:13:05,293 INFO L87 Difference]: Start difference. First operand 5265 states and 21531 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:13:08,484 INFO L93 Difference]: Finished difference Result 9516 states and 40808 transitions. [2022-11-20 20:13:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:13:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:13:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:13:08,516 INFO L225 Difference]: With dead ends: 9516 [2022-11-20 20:13:08,516 INFO L226 Difference]: Without dead ends: 9516 [2022-11-20 20:13:08,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:13:08,517 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 225 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:13:08,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 72 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 491 Unchecked, 1.9s Time] [2022-11-20 20:13:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2022-11-20 20:13:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 7264. [2022-11-20 20:13:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7264 states, 7254 states have (on average 4.370416322029225) internal successors, (31703), 7263 states have internal predecessors, (31703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7264 states to 7264 states and 31703 transitions. [2022-11-20 20:13:08,738 INFO L78 Accepts]: Start accepts. Automaton has 7264 states and 31703 transitions. Word has length 13 [2022-11-20 20:13:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:13:08,738 INFO L495 AbstractCegarLoop]: Abstraction has 7264 states and 31703 transitions. [2022-11-20 20:13:08,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7264 states and 31703 transitions. [2022-11-20 20:13:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:13:08,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:13:08,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:13:08,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-11-20 20:13:08,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Ended with exit code 0 [2022-11-20 20:13:09,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (180)] Ended with exit code 0 [2022-11-20 20:13:09,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:09,341 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:13:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:13:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash -498916074, now seen corresponding path program 5 times [2022-11-20 20:13:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:13:09,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081777581] [2022-11-20 20:13:09,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:13:09,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:13:09,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:13:09,343 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:13:09,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-20 20:13:09,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:13:09,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:09,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:13:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:09,879 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:13:09,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:13:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:10,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:11,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:13:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081777581] [2022-11-20 20:13:11,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081777581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786319201] [2022-11-20 20:13:11,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:13:11,327 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:11,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:13:11,328 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:13:11,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (183)] Waiting until timeout for monitored process [2022-11-20 20:13:12,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:13:12,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:12,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:13:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:12,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:13,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786319201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892806583] [2022-11-20 20:13:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:13:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:13:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:13:13,141 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:13:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-11-20 20:13:13,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:13:13,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:13:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:13,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:13,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892806583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:13,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:13:13,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 24 [2022-11-20 20:13:13,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645260064] [2022-11-20 20:13:13,894 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:13:13,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 20:13:13,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:13:13,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 20:13:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:13:13,895 INFO L87 Difference]: Start difference. First operand 7264 states and 31703 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:13:18,400 INFO L93 Difference]: Finished difference Result 11931 states and 50867 transitions. [2022-11-20 20:13:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 20:13:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:13:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:13:18,450 INFO L225 Difference]: With dead ends: 11931 [2022-11-20 20:13:18,450 INFO L226 Difference]: Without dead ends: 11923 [2022-11-20 20:13:18,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 20:13:18,450 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 305 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 517 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:13:18,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 113 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 796 Invalid, 0 Unknown, 517 Unchecked, 3.3s Time] [2022-11-20 20:13:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11923 states. [2022-11-20 20:13:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11923 to 8869. [2022-11-20 20:13:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8860 states have (on average 4.451918735891648) internal successors, (39444), 8868 states have internal predecessors, (39444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 39444 transitions. [2022-11-20 20:13:18,721 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 39444 transitions. Word has length 13 [2022-11-20 20:13:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:13:18,721 INFO L495 AbstractCegarLoop]: Abstraction has 8869 states and 39444 transitions. [2022-11-20 20:13:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 39444 transitions. [2022-11-20 20:13:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:13:18,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:13:18,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:13:18,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Ended with exit code 0 [2022-11-20 20:13:18,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-11-20 20:13:19,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (183)] Ended with exit code 0 [2022-11-20 20:13:19,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:19,325 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:13:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:13:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash -492730272, now seen corresponding path program 4 times [2022-11-20 20:13:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:13:19,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991814609] [2022-11-20 20:13:19,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:13:19,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:13:19,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:13:19,327 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:13:19,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-20 20:13:19,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:13:19,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:19,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:13:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:19,841 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:13:19,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:13:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:13:20,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:13:21,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:13:21,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991814609] [2022-11-20 20:13:21,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991814609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:21,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18731290] [2022-11-20 20:13:21,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:13:21,048 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:21,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:13:21,049 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:13:21,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (186)] Waiting until timeout for monitored process [2022-11-20 20:13:21,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:13:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:21,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:13:21,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:22,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:22,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18731290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7642191] [2022-11-20 20:13:22,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:13:22,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:13:22,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:13:22,822 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:13:22,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-11-20 20:13:23,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:13:23,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:23,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:13:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:23,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:24,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7642191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:24,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:13:24,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 8, 8] total 31 [2022-11-20 20:13:24,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158791072] [2022-11-20 20:13:24,386 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:13:24,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 20:13:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:13:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 20:13:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:13:24,387 INFO L87 Difference]: Start difference. First operand 8869 states and 39444 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:13:30,552 INFO L93 Difference]: Finished difference Result 9221 states and 40572 transitions. [2022-11-20 20:13:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 20:13:30,554 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:13:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:13:30,648 INFO L225 Difference]: With dead ends: 9221 [2022-11-20 20:13:30,648 INFO L226 Difference]: Without dead ends: 9221 [2022-11-20 20:13:30,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=427, Invalid=2225, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 20:13:30,649 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 63 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:13:30,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 102 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 428 Invalid, 0 Unknown, 93 Unchecked, 1.7s Time] [2022-11-20 20:13:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9221 states. [2022-11-20 20:13:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9221 to 8882. [2022-11-20 20:13:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8882 states, 8873 states have (on average 4.450918516848867) internal successors, (39493), 8881 states have internal predecessors, (39493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:30,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8882 states to 8882 states and 39493 transitions. [2022-11-20 20:13:30,866 INFO L78 Accepts]: Start accepts. Automaton has 8882 states and 39493 transitions. Word has length 13 [2022-11-20 20:13:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:13:30,866 INFO L495 AbstractCegarLoop]: Abstraction has 8882 states and 39493 transitions. [2022-11-20 20:13:30,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8882 states and 39493 transitions. [2022-11-20 20:13:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:13:30,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:13:30,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:13:30,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Ended with exit code 0 [2022-11-20 20:13:31,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-11-20 20:13:31,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (186)] Ended with exit code 0 [2022-11-20 20:13:31,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:31,470 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:13:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:13:31,471 INFO L85 PathProgramCache]: Analyzing trace with hash -494299182, now seen corresponding path program 5 times [2022-11-20 20:13:31,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:13:31,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254566540] [2022-11-20 20:13:31,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:13:31,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:13:31,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:13:31,472 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:13:31,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-20 20:13:31,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:13:31,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:13:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:32,050 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:13:32,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:13:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:32,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:33,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:13:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254566540] [2022-11-20 20:13:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254566540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450561318] [2022-11-20 20:13:33,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:13:33,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:13:33,733 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:13:33,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (189)] Waiting until timeout for monitored process [2022-11-20 20:13:34,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:13:34,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:13:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:34,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450561318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:35,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069967224] [2022-11-20 20:13:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:13:35,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:13:35,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:13:35,506 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:13:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-11-20 20:13:35,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:13:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:13:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:36,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:37,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069967224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:37,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:13:37,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 8, 8] total 37 [2022-11-20 20:13:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107294134] [2022-11-20 20:13:37,615 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:13:37,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 20:13:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:13:37,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 20:13:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 20:13:37,616 INFO L87 Difference]: Start difference. First operand 8882 states and 39493 transitions. Second operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:13:51,752 INFO L93 Difference]: Finished difference Result 11710 states and 49523 transitions. [2022-11-20 20:13:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 20:13:51,754 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:13:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:13:51,790 INFO L225 Difference]: With dead ends: 11710 [2022-11-20 20:13:51,790 INFO L226 Difference]: Without dead ends: 11710 [2022-11-20 20:13:51,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2579 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1153, Invalid=6503, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 20:13:51,791 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 587 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:13:51,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 110 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1523 Invalid, 0 Unknown, 245 Unchecked, 6.1s Time] [2022-11-20 20:13:51,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11710 states. [2022-11-20 20:13:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11710 to 9640. [2022-11-20 20:13:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9640 states, 9631 states have (on average 4.428719759111203) internal successors, (42653), 9639 states have internal predecessors, (42653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9640 states to 9640 states and 42653 transitions. [2022-11-20 20:13:52,044 INFO L78 Accepts]: Start accepts. Automaton has 9640 states and 42653 transitions. Word has length 13 [2022-11-20 20:13:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:13:52,044 INFO L495 AbstractCegarLoop]: Abstraction has 9640 states and 42653 transitions. [2022-11-20 20:13:52,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.0) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 9640 states and 42653 transitions. [2022-11-20 20:13:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:13:52,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:13:52,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:13:52,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (189)] Ended with exit code 0 [2022-11-20 20:13:52,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-11-20 20:13:52,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Ended with exit code 0 [2022-11-20 20:13:52,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:13:52,649 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:13:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:13:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash -564158364, now seen corresponding path program 6 times [2022-11-20 20:13:52,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:13:52,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10327715] [2022-11-20 20:13:52,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:13:52,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:13:52,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:13:52,650 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:13:52,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-20 20:13:53,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 20:13:53,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:13:53,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:53,189 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:13:53,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:13:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:53,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:13:54,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:13:54,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10327715] [2022-11-20 20:13:54,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10327715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:54,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368523350] [2022-11-20 20:13:54,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:13:54,198 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:13:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:13:54,199 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:13:54,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (192)] Waiting until timeout for monitored process [2022-11-20 20:13:55,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 20:13:55,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:55,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:13:55,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:55,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:55,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368523350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840290253] [2022-11-20 20:13:55,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:13:55,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:13:55,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:13:55,815 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:13:55,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-11-20 20:13:56,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 20:13:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:13:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:13:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:13:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:56,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:13:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:13:56,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840290253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:13:56,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:13:56,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:13:56,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838423964] [2022-11-20 20:13:56,864 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:13:56,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:13:56,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:13:56,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:13:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:13:56,864 INFO L87 Difference]: Start difference. First operand 9640 states and 42653 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:13:59,613 INFO L93 Difference]: Finished difference Result 9870 states and 43602 transitions. [2022-11-20 20:13:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:13:59,613 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:13:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:13:59,716 INFO L225 Difference]: With dead ends: 9870 [2022-11-20 20:13:59,716 INFO L226 Difference]: Without dead ends: 9870 [2022-11-20 20:13:59,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:13:59,717 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:13:59,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 143 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2022-11-20 20:13:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-11-20 20:13:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9728. [2022-11-20 20:13:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9728 states, 9719 states have (on average 4.42761600987756) internal successors, (43032), 9727 states have internal predecessors, (43032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9728 states to 9728 states and 43032 transitions. [2022-11-20 20:13:59,985 INFO L78 Accepts]: Start accepts. Automaton has 9728 states and 43032 transitions. Word has length 13 [2022-11-20 20:13:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:13:59,985 INFO L495 AbstractCegarLoop]: Abstraction has 9728 states and 43032 transitions. [2022-11-20 20:13:59,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:13:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 9728 states and 43032 transitions. [2022-11-20 20:13:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:13:59,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:13:59,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:13:59,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (192)] Ended with exit code 0 [2022-11-20 20:14:00,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-11-20 20:14:00,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Ended with exit code 0 [2022-11-20 20:14:00,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:00,589 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:14:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash -563115834, now seen corresponding path program 7 times [2022-11-20 20:14:00,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:14:00,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679333493] [2022-11-20 20:14:00,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:14:00,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:14:00,590 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:14:00,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-20 20:14:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:01,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:14:01,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:01,164 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:01,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:14:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:01,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:02,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:14:02,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679333493] [2022-11-20 20:14:02,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679333493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:02,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [769859766] [2022-11-20 20:14:02,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:14:02,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:02,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:14:02,487 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:14:02,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (195)] Waiting until timeout for monitored process [2022-11-20 20:14:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:03,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:03,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:03,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:04,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [769859766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:04,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114119590] [2022-11-20 20:14:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:14:04,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:04,186 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:04,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-11-20 20:14:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:04,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:04,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:04,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:04,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114119590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:04,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:14:04,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:14:04,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271216293] [2022-11-20 20:14:04,826 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:04,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:14:04,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:14:04,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:14:04,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:14:04,827 INFO L87 Difference]: Start difference. First operand 9728 states and 43032 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:08,640 INFO L93 Difference]: Finished difference Result 11663 states and 52292 transitions. [2022-11-20 20:14:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:14:08,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:14:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:08,688 INFO L225 Difference]: With dead ends: 11663 [2022-11-20 20:14:08,688 INFO L226 Difference]: Without dead ends: 11663 [2022-11-20 20:14:08,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:14:08,689 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 96 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:08,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 85 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 492 Invalid, 0 Unknown, 126 Unchecked, 2.4s Time] [2022-11-20 20:14:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11663 states. [2022-11-20 20:14:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11663 to 10090. [2022-11-20 20:14:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10090 states, 10081 states have (on average 4.431703204047218) internal successors, (44676), 10089 states have internal predecessors, (44676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10090 states to 10090 states and 44676 transitions. [2022-11-20 20:14:09,045 INFO L78 Accepts]: Start accepts. Automaton has 10090 states and 44676 transitions. Word has length 13 [2022-11-20 20:14:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:09,045 INFO L495 AbstractCegarLoop]: Abstraction has 10090 states and 44676 transitions. [2022-11-20 20:14:09,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 10090 states and 44676 transitions. [2022-11-20 20:14:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:14:09,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:09,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:14:09,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-11-20 20:14:09,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (195)] Ended with exit code 0 [2022-11-20 20:14:09,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Ended with exit code 0 [2022-11-20 20:14:09,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:09,649 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:14:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash 139972160, now seen corresponding path program 8 times [2022-11-20 20:14:09,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:14:09,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543941090] [2022-11-20 20:14:09,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:14:09,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:09,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:14:09,651 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:14:09,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-20 20:14:10,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:14:10,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:14:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:10,340 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:10,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:14:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:10,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:11,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:14:11,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543941090] [2022-11-20 20:14:11,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543941090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:11,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [141696879] [2022-11-20 20:14:11,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:14:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:14:11,304 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:14:11,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (198)] Waiting until timeout for monitored process [2022-11-20 20:14:12,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:14:12,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:12,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:14:12,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:12,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:13,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [141696879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:13,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760680538] [2022-11-20 20:14:13,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:14:13,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:13,228 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:13,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-11-20 20:14:13,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:14:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:13,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:13,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:14,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760680538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:14,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:14:14,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 7, 6, 6] total 30 [2022-11-20 20:14:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357417268] [2022-11-20 20:14:14,537 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:14,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 20:14:14,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:14:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 20:14:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:14:14,538 INFO L87 Difference]: Start difference. First operand 10090 states and 44676 transitions. Second operand has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:19,516 INFO L93 Difference]: Finished difference Result 10356 states and 45803 transitions. [2022-11-20 20:14:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 20:14:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:14:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:19,560 INFO L225 Difference]: With dead ends: 10356 [2022-11-20 20:14:19,560 INFO L226 Difference]: Without dead ends: 10356 [2022-11-20 20:14:19,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 20:14:19,561 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:19,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 80 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 307 Invalid, 0 Unknown, 56 Unchecked, 1.3s Time] [2022-11-20 20:14:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2022-11-20 20:14:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 10184. [2022-11-20 20:14:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10184 states, 10175 states have (on average 4.434201474201474) internal successors, (45118), 10183 states have internal predecessors, (45118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10184 states to 10184 states and 45118 transitions. [2022-11-20 20:14:19,894 INFO L78 Accepts]: Start accepts. Automaton has 10184 states and 45118 transitions. Word has length 13 [2022-11-20 20:14:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:19,894 INFO L495 AbstractCegarLoop]: Abstraction has 10184 states and 45118 transitions. [2022-11-20 20:14:19,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 10184 states and 45118 transitions. [2022-11-20 20:14:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:14:19,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:19,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:14:19,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Forceful destruction successful, exit code 0 [2022-11-20 20:14:20,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (198)] Ended with exit code 0 [2022-11-20 20:14:20,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-11-20 20:14:20,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:20,516 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:14:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash 137718770, now seen corresponding path program 9 times [2022-11-20 20:14:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:14:20,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647538077] [2022-11-20 20:14:20,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:14:20,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:20,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:14:20,518 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:14:20,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Waiting until timeout for monitored process [2022-11-20 20:14:21,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:14:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:14:21,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:21,171 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:21,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:14:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:21,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:22,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:14:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647538077] [2022-11-20 20:14:22,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647538077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1253737400] [2022-11-20 20:14:22,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:14:22,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:14:22,207 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:14:22,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (201)] Waiting until timeout for monitored process [2022-11-20 20:14:23,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:14:23,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:23,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:14:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:23,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:23,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1253737400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:23,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901079846] [2022-11-20 20:14:23,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:14:23,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:23,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:23,811 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:23,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-11-20 20:14:24,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:14:24,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:24,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:24,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:24,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901079846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:24,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:14:24,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:14:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993768993] [2022-11-20 20:14:24,937 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:24,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:14:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:14:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:14:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:14:24,938 INFO L87 Difference]: Start difference. First operand 10184 states and 45118 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:28,999 INFO L93 Difference]: Finished difference Result 10315 states and 45652 transitions. [2022-11-20 20:14:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:14:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:14:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:29,036 INFO L225 Difference]: With dead ends: 10315 [2022-11-20 20:14:29,036 INFO L226 Difference]: Without dead ends: 10315 [2022-11-20 20:14:29,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:14:29,037 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:29,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 190 Invalid, 0 Unknown, 113 Unchecked, 0.9s Time] [2022-11-20 20:14:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2022-11-20 20:14:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 10222. [2022-11-20 20:14:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10222 states, 10213 states have (on average 4.434054636247919) internal successors, (45285), 10221 states have internal predecessors, (45285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10222 states to 10222 states and 45285 transitions. [2022-11-20 20:14:29,354 INFO L78 Accepts]: Start accepts. Automaton has 10222 states and 45285 transitions. Word has length 13 [2022-11-20 20:14:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:29,355 INFO L495 AbstractCegarLoop]: Abstraction has 10222 states and 45285 transitions. [2022-11-20 20:14:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10222 states and 45285 transitions. [2022-11-20 20:14:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:14:29,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:29,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:14:29,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-11-20 20:14:29,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Ended with exit code 0 [2022-11-20 20:14:29,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (201)] Forceful destruction successful, exit code 0 [2022-11-20 20:14:29,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:29,960 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:14:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1785772495, now seen corresponding path program 4 times [2022-11-20 20:14:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:14:29,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530277753] [2022-11-20 20:14:29,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:14:29,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:29,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:14:29,962 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:14:29,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Waiting until timeout for monitored process [2022-11-20 20:14:30,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:14:30,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:30,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:14:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:30,521 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:30,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:14:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:30,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:31,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:14:31,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530277753] [2022-11-20 20:14:31,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530277753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:31,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001250242] [2022-11-20 20:14:31,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:14:31,988 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:31,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:14:31,989 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:14:31,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (204)] Waiting until timeout for monitored process [2022-11-20 20:14:32,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:14:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:14:32,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:32,891 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:32,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:14:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:33,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:34,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001250242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:34,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509828984] [2022-11-20 20:14:34,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:14:34,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:34,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:34,124 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:34,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-11-20 20:14:34,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:14:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:34,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:14:34,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:34,739 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:34,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:14:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:34,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:34,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509828984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:34,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:14:34,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 6, 6, 6] total 23 [2022-11-20 20:14:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977450473] [2022-11-20 20:14:34,970 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:34,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:14:34,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:14:34,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:14:34,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:14:34,971 INFO L87 Difference]: Start difference. First operand 10222 states and 45285 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:42,219 INFO L93 Difference]: Finished difference Result 10930 states and 47447 transitions. [2022-11-20 20:14:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:14:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:14:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:42,346 INFO L225 Difference]: With dead ends: 10930 [2022-11-20 20:14:42,346 INFO L226 Difference]: Without dead ends: 10930 [2022-11-20 20:14:42,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:14:42,346 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 173 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:42,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 194 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 951 Invalid, 0 Unknown, 109 Unchecked, 6.1s Time] [2022-11-20 20:14:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10930 states. [2022-11-20 20:14:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10930 to 10215. [2022-11-20 20:14:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10215 states, 10206 states have (on average 4.426317852243778) internal successors, (45175), 10214 states have internal predecessors, (45175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10215 states to 10215 states and 45175 transitions. [2022-11-20 20:14:42,581 INFO L78 Accepts]: Start accepts. Automaton has 10215 states and 45175 transitions. Word has length 13 [2022-11-20 20:14:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:42,582 INFO L495 AbstractCegarLoop]: Abstraction has 10215 states and 45175 transitions. [2022-11-20 20:14:42,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 10215 states and 45175 transitions. [2022-11-20 20:14:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:14:42,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:42,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:14:42,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (204)] Ended with exit code 0 [2022-11-20 20:14:42,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Ended with exit code 0 [2022-11-20 20:14:42,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-11-20 20:14:43,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:43,185 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:14:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1483785718, now seen corresponding path program 1 times [2022-11-20 20:14:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:14:43,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639027958] [2022-11-20 20:14:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:43,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:43,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:14:43,187 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:14:43,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Waiting until timeout for monitored process [2022-11-20 20:14:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:14:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:43,720 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:43,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:14:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:44,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:44,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:14:44,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639027958] [2022-11-20 20:14:44,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639027958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:44,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1762457393] [2022-11-20 20:14:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:44,868 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:14:44,869 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:14:44,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (207)] Waiting until timeout for monitored process [2022-11-20 20:14:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:45,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:46,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1762457393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504483102] [2022-11-20 20:14:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:46,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:46,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:46,436 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:46,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-11-20 20:14:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:46,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:47,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:47,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504483102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:47,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:14:47,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:14:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505406736] [2022-11-20 20:14:47,095 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:47,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:14:47,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:14:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:14:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:14:47,096 INFO L87 Difference]: Start difference. First operand 10215 states and 45175 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:49,311 INFO L93 Difference]: Finished difference Result 10432 states and 46274 transitions. [2022-11-20 20:14:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:14:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:14:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:49,349 INFO L225 Difference]: With dead ends: 10432 [2022-11-20 20:14:49,349 INFO L226 Difference]: Without dead ends: 10432 [2022-11-20 20:14:49,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:14:49,350 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:49,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 53 Unchecked, 0.8s Time] [2022-11-20 20:14:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2022-11-20 20:14:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 10270. [2022-11-20 20:14:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10270 states, 10261 states have (on average 4.432413994737355) internal successors, (45481), 10269 states have internal predecessors, (45481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10270 states to 10270 states and 45481 transitions. [2022-11-20 20:14:49,626 INFO L78 Accepts]: Start accepts. Automaton has 10270 states and 45481 transitions. Word has length 13 [2022-11-20 20:14:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:49,627 INFO L495 AbstractCegarLoop]: Abstraction has 10270 states and 45481 transitions. [2022-11-20 20:14:49,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10270 states and 45481 transitions. [2022-11-20 20:14:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:14:49,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:49,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:14:49,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (207)] Ended with exit code 0 [2022-11-20 20:14:49,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-11-20 20:14:50,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Ended with exit code 0 [2022-11-20 20:14:50,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:50,231 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:14:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:50,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1379427845, now seen corresponding path program 1 times [2022-11-20 20:14:50,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:14:50,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482461190] [2022-11-20 20:14:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:50,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:14:50,232 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:14:50,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Waiting until timeout for monitored process [2022-11-20 20:14:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:50,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:14:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:50,775 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:50,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:14:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:51,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:14:51,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482461190] [2022-11-20 20:14:51,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482461190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:51,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840587425] [2022-11-20 20:14:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:51,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:14:51,963 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:14:51,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (210)] Waiting until timeout for monitored process [2022-11-20 20:14:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:52,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:53,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:53,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840587425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:53,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447663181] [2022-11-20 20:14:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:14:53,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:14:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:53,645 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:14:53,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-11-20 20:14:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:14:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:14:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:54,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:14:54,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447663181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:54,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:14:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:14:54,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789492269] [2022-11-20 20:14:54,326 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:14:54,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:14:54,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:14:54,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:14:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:14:54,327 INFO L87 Difference]: Start difference. First operand 10270 states and 45481 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:14:56,456 INFO L93 Difference]: Finished difference Result 10461 states and 46251 transitions. [2022-11-20 20:14:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:14:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:14:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:14:56,490 INFO L225 Difference]: With dead ends: 10461 [2022-11-20 20:14:56,490 INFO L226 Difference]: Without dead ends: 10461 [2022-11-20 20:14:56,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:14:56,491 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:14:56,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 40 Unchecked, 1.0s Time] [2022-11-20 20:14:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10461 states. [2022-11-20 20:14:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10461 to 10322. [2022-11-20 20:14:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10322 states, 10313 states have (on average 4.428197420731116) internal successors, (45668), 10321 states have internal predecessors, (45668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10322 states to 10322 states and 45668 transitions. [2022-11-20 20:14:56,786 INFO L78 Accepts]: Start accepts. Automaton has 10322 states and 45668 transitions. Word has length 13 [2022-11-20 20:14:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:14:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 10322 states and 45668 transitions. [2022-11-20 20:14:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:14:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10322 states and 45668 transitions. [2022-11-20 20:14:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:14:56,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:14:56,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:14:56,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-11-20 20:14:57,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (210)] Ended with exit code 0 [2022-11-20 20:14:57,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Ended with exit code 0 [2022-11-20 20:14:57,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:57,391 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:14:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:14:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1495404208, now seen corresponding path program 2 times [2022-11-20 20:14:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:14:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366018444] [2022-11-20 20:14:57,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:14:57,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:14:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:14:57,394 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:14:57,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Waiting until timeout for monitored process [2022-11-20 20:14:57,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:14:57,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:57,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:14:57,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:14:57,963 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:14:57,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:14:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:58,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:14:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:14:58,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:14:58,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366018444] [2022-11-20 20:14:58,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366018444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:14:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [955643696] [2022-11-20 20:14:58,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:14:58,866 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:14:58,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:14:58,867 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:14:58,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (213)] Waiting until timeout for monitored process [2022-11-20 20:14:59,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:14:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:14:59,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:14:59,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:00,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:00,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [955643696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:00,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021451479] [2022-11-20 20:15:00,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:15:00,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:00,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:00,422 INFO L229 MonitoredProcess]: Starting monitored process 214 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:00,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-11-20 20:15:00,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:15:00,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:01,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:01,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:01,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:01,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021451479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:01,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:15:01,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:15:01,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770610648] [2022-11-20 20:15:01,618 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:01,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:15:01,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:15:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:15:01,619 INFO L87 Difference]: Start difference. First operand 10322 states and 45668 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:04,880 INFO L93 Difference]: Finished difference Result 10767 states and 47794 transitions. [2022-11-20 20:15:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:15:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:15:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:04,917 INFO L225 Difference]: With dead ends: 10767 [2022-11-20 20:15:04,917 INFO L226 Difference]: Without dead ends: 10767 [2022-11-20 20:15:04,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 20:15:04,918 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 113 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:04,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 64 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 0 Unknown, 215 Unchecked, 1.1s Time] [2022-11-20 20:15:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2022-11-20 20:15:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 10643. [2022-11-20 20:15:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10643 states, 10634 states have (on average 4.440944141433139) internal successors, (47225), 10642 states have internal predecessors, (47225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10643 states to 10643 states and 47225 transitions. [2022-11-20 20:15:05,278 INFO L78 Accepts]: Start accepts. Automaton has 10643 states and 47225 transitions. Word has length 13 [2022-11-20 20:15:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:05,279 INFO L495 AbstractCegarLoop]: Abstraction has 10643 states and 47225 transitions. [2022-11-20 20:15:05,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10643 states and 47225 transitions. [2022-11-20 20:15:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:05,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:05,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:05,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-11-20 20:15:05,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Ended with exit code 0 [2022-11-20 20:15:05,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (213)] Ended with exit code 0 [2022-11-20 20:15:05,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,213 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:15:05,886 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1492037825, now seen corresponding path program 2 times [2022-11-20 20:15:05,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:05,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282304393] [2022-11-20 20:15:05,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:15:05,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:05,888 INFO L229 MonitoredProcess]: Starting monitored process 215 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:05,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Waiting until timeout for monitored process [2022-11-20 20:15:06,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:15:06,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:15:06,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:06,521 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:06,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:15:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:06,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:07,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282304393] [2022-11-20 20:15:07,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282304393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:07,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [846859683] [2022-11-20 20:15:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:15:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:15:07,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:15:07,555 INFO L229 MonitoredProcess]: Starting monitored process 216 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:15:07,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (216)] Waiting until timeout for monitored process [2022-11-20 20:15:08,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:15:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:15:08,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:08,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:09,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [846859683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:09,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739989406] [2022-11-20 20:15:09,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:15:09,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:09,147 INFO L229 MonitoredProcess]: Starting monitored process 217 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:09,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-11-20 20:15:09,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:15:09,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:09,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:10,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:10,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739989406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:10,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:15:10,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:15:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093354427] [2022-11-20 20:15:10,360 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:15:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:15:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:15:10,361 INFO L87 Difference]: Start difference. First operand 10643 states and 47225 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:12,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:12,941 INFO L93 Difference]: Finished difference Result 10770 states and 47709 transitions. [2022-11-20 20:15:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:15:12,941 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:15:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:12,980 INFO L225 Difference]: With dead ends: 10770 [2022-11-20 20:15:12,980 INFO L226 Difference]: Without dead ends: 10770 [2022-11-20 20:15:12,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=251, Invalid=1155, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 20:15:12,980 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:12,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 63 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 43 Unchecked, 0.6s Time] [2022-11-20 20:15:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10770 states. [2022-11-20 20:15:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10770 to 10654. [2022-11-20 20:15:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10654 states, 10645 states have (on average 4.441521841240019) internal successors, (47280), 10653 states have internal predecessors, (47280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10654 states to 10654 states and 47280 transitions. [2022-11-20 20:15:13,229 INFO L78 Accepts]: Start accepts. Automaton has 10654 states and 47280 transitions. Word has length 13 [2022-11-20 20:15:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:13,229 INFO L495 AbstractCegarLoop]: Abstraction has 10654 states and 47280 transitions. [2022-11-20 20:15:13,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 10654 states and 47280 transitions. [2022-11-20 20:15:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:13,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:13,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:13,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Ended with exit code 0 [2022-11-20 20:15:13,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (216)] Ended with exit code 0 [2022-11-20 20:15:13,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-11-20 20:15:13,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,216 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,217 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:13,834 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1492598398, now seen corresponding path program 3 times [2022-11-20 20:15:13,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:13,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351375054] [2022-11-20 20:15:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:13,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:13,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:13,836 INFO L229 MonitoredProcess]: Starting monitored process 218 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:13,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Waiting until timeout for monitored process [2022-11-20 20:15:14,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:15:14,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:14,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:15:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:14,441 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:14,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:15:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:14,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:15,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:15,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351375054] [2022-11-20 20:15:15,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351375054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:15,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713421900] [2022-11-20 20:15:15,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:15,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:15:15,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:15:15,382 INFO L229 MonitoredProcess]: Starting monitored process 219 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:15:15,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (219)] Waiting until timeout for monitored process [2022-11-20 20:15:16,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:15:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:15:16,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:16,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:16,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1713421900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:16,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353284325] [2022-11-20 20:15:16,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:16,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:16,955 INFO L229 MonitoredProcess]: Starting monitored process 220 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:16,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-11-20 20:15:17,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:15:17,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:17,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:18,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353284325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:18,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:15:18,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:15:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579898115] [2022-11-20 20:15:18,118 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:15:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:15:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:15:18,119 INFO L87 Difference]: Start difference. First operand 10654 states and 47280 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:21,148 INFO L93 Difference]: Finished difference Result 10834 states and 48115 transitions. [2022-11-20 20:15:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:15:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:15:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:21,187 INFO L225 Difference]: With dead ends: 10834 [2022-11-20 20:15:21,187 INFO L226 Difference]: Without dead ends: 10834 [2022-11-20 20:15:21,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:15:21,187 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:21,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 230 Invalid, 0 Unknown, 43 Unchecked, 1.2s Time] [2022-11-20 20:15:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2022-11-20 20:15:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 10718. [2022-11-20 20:15:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10718 states, 10709 states have (on average 4.446353534410309) internal successors, (47616), 10717 states have internal predecessors, (47616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10718 states to 10718 states and 47616 transitions. [2022-11-20 20:15:21,432 INFO L78 Accepts]: Start accepts. Automaton has 10718 states and 47616 transitions. Word has length 13 [2022-11-20 20:15:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:21,432 INFO L495 AbstractCegarLoop]: Abstraction has 10718 states and 47616 transitions. [2022-11-20 20:15:21,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10718 states and 47616 transitions. [2022-11-20 20:15:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:21,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:21,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:21,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (219)] Ended with exit code 0 [2022-11-20 20:15:21,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Ended with exit code 0 [2022-11-20 20:15:21,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-11-20 20:15:22,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,218 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,220 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:22,037 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1492594895, now seen corresponding path program 3 times [2022-11-20 20:15:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:22,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857068111] [2022-11-20 20:15:22,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:22,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:22,038 INFO L229 MonitoredProcess]: Starting monitored process 221 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:22,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Waiting until timeout for monitored process [2022-11-20 20:15:22,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:15:22,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:15:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:22,628 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:22,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:23,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:23,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:23,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857068111] [2022-11-20 20:15:23,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857068111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147414207] [2022-11-20 20:15:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:23,654 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:15:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:15:23,655 INFO L229 MonitoredProcess]: Starting monitored process 222 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:15:23,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (222)] Waiting until timeout for monitored process [2022-11-20 20:15:24,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:15:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:15:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:24,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:25,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1147414207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:25,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896302304] [2022-11-20 20:15:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:25,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:25,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:25,235 INFO L229 MonitoredProcess]: Starting monitored process 223 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:25,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-11-20 20:15:25,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:15:25,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:25,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:26,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:26,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896302304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:26,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:15:26,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 5, 6, 6] total 25 [2022-11-20 20:15:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120690457] [2022-11-20 20:15:26,339 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:26,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:15:26,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:15:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:15:26,340 INFO L87 Difference]: Start difference. First operand 10718 states and 47616 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:29,351 INFO L93 Difference]: Finished difference Result 10808 states and 47943 transitions. [2022-11-20 20:15:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:15:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:15:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:29,396 INFO L225 Difference]: With dead ends: 10808 [2022-11-20 20:15:29,397 INFO L226 Difference]: Without dead ends: 10808 [2022-11-20 20:15:29,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:15:29,397 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:29,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 70 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 54 Unchecked, 0.8s Time] [2022-11-20 20:15:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10808 states. [2022-11-20 20:15:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10808 to 10707. [2022-11-20 20:15:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10707 states, 10698 states have (on average 4.445784258739951) internal successors, (47561), 10706 states have internal predecessors, (47561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10707 states to 10707 states and 47561 transitions. [2022-11-20 20:15:29,763 INFO L78 Accepts]: Start accepts. Automaton has 10707 states and 47561 transitions. Word has length 13 [2022-11-20 20:15:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:29,763 INFO L495 AbstractCegarLoop]: Abstraction has 10707 states and 47561 transitions. [2022-11-20 20:15:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 10707 states and 47561 transitions. [2022-11-20 20:15:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:29,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:29,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:29,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Ended with exit code 0 [2022-11-20 20:15:29,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-11-20 20:15:30,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (222)] Forceful destruction successful, exit code 0 [2022-11-20 20:15:30,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,223 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,222 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:15:30,367 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:30,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1996099818, now seen corresponding path program 4 times [2022-11-20 20:15:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:30,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594549672] [2022-11-20 20:15:30,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:15:30,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:30,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:30,369 INFO L229 MonitoredProcess]: Starting monitored process 224 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:30,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Waiting until timeout for monitored process [2022-11-20 20:15:30,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:15:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:30,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:15:30,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:30,966 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:30,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:15:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:31,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:32,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594549672] [2022-11-20 20:15:32,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594549672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [866510315] [2022-11-20 20:15:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:15:32,244 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:15:32,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:15:32,245 INFO L229 MonitoredProcess]: Starting monitored process 225 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:15:32,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (225)] Waiting until timeout for monitored process [2022-11-20 20:15:33,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:15:33,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:33,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:33,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:34,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [866510315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:34,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748563665] [2022-11-20 20:15:34,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:15:34,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:34,005 INFO L229 MonitoredProcess]: Starting monitored process 226 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:34,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-11-20 20:15:34,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:15:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:34,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:34,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:34,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:34,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748563665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:34,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:15:34,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:15:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721567969] [2022-11-20 20:15:34,688 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:34,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:15:34,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:15:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:15:34,689 INFO L87 Difference]: Start difference. First operand 10707 states and 47561 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:37,586 INFO L93 Difference]: Finished difference Result 11837 states and 52310 transitions. [2022-11-20 20:15:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:15:37,586 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:15:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:37,625 INFO L225 Difference]: With dead ends: 11837 [2022-11-20 20:15:37,625 INFO L226 Difference]: Without dead ends: 11837 [2022-11-20 20:15:37,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:15:37,625 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:37,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 84 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 343 Invalid, 0 Unknown, 149 Unchecked, 1.6s Time] [2022-11-20 20:15:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2022-11-20 20:15:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11088. [2022-11-20 20:15:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11088 states, 11079 states have (on average 4.458073833378464) internal successors, (49391), 11087 states have internal predecessors, (49391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11088 states to 11088 states and 49391 transitions. [2022-11-20 20:15:38,033 INFO L78 Accepts]: Start accepts. Automaton has 11088 states and 49391 transitions. Word has length 13 [2022-11-20 20:15:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:38,033 INFO L495 AbstractCegarLoop]: Abstraction has 11088 states and 49391 transitions. [2022-11-20 20:15:38,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 11088 states and 49391 transitions. [2022-11-20 20:15:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:38,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:38,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:38,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Ended with exit code 0 [2022-11-20 20:15:38,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (225)] Forceful destruction successful, exit code 0 [2022-11-20 20:15:38,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-11-20 20:15:38,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,225 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,226 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:38,639 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:38,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:38,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1999466201, now seen corresponding path program 4 times [2022-11-20 20:15:38,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:38,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389198606] [2022-11-20 20:15:38,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:15:38,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:38,642 INFO L229 MonitoredProcess]: Starting monitored process 227 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:38,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Waiting until timeout for monitored process [2022-11-20 20:15:39,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:15:39,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:15:39,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:39,234 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:39,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:39,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:40,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:40,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389198606] [2022-11-20 20:15:40,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389198606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:40,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314707710] [2022-11-20 20:15:40,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:15:40,541 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:15:40,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:15:40,542 INFO L229 MonitoredProcess]: Starting monitored process 228 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:15:40,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (228)] Waiting until timeout for monitored process [2022-11-20 20:15:41,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:15:41,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:41,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:42,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314707710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84088479] [2022-11-20 20:15:42,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:15:42,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:42,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:42,270 INFO L229 MonitoredProcess]: Starting monitored process 229 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:42,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-11-20 20:15:42,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:15:42,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:15:42,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:42,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:42,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84088479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:42,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:15:42,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-20 20:15:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785605832] [2022-11-20 20:15:42,985 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:42,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:15:42,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:42,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:15:42,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:15:42,985 INFO L87 Difference]: Start difference. First operand 11088 states and 49391 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:44,982 INFO L93 Difference]: Finished difference Result 11247 states and 49978 transitions. [2022-11-20 20:15:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:15:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:15:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:45,017 INFO L225 Difference]: With dead ends: 11247 [2022-11-20 20:15:45,017 INFO L226 Difference]: Without dead ends: 11247 [2022-11-20 20:15:45,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:15:45,018 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:45,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 75 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 30 Unchecked, 0.7s Time] [2022-11-20 20:15:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11247 states. [2022-11-20 20:15:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11247 to 11096. [2022-11-20 20:15:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 11087 states have (on average 4.458555064489943) internal successors, (49432), 11095 states have internal predecessors, (49432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 49432 transitions. [2022-11-20 20:15:45,365 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 49432 transitions. Word has length 13 [2022-11-20 20:15:45,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:45,366 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 49432 transitions. [2022-11-20 20:15:45,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 49432 transitions. [2022-11-20 20:15:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:45,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:45,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:45,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-11-20 20:15:45,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (228)] Ended with exit code 0 [2022-11-20 20:15:45,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Ended with exit code 0 [2022-11-20 20:15:45,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,228 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,227 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:45,970 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash -807746834, now seen corresponding path program 1 times [2022-11-20 20:15:45,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:45,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762277066] [2022-11-20 20:15:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:45,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:45,972 INFO L229 MonitoredProcess]: Starting monitored process 230 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:45,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Waiting until timeout for monitored process [2022-11-20 20:15:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:46,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:46,543 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:46,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:46,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:46,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:46,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762277066] [2022-11-20 20:15:46,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762277066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:46,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:46,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:46,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321906754] [2022-11-20 20:15:46,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:46,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:46,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:46,903 INFO L87 Difference]: Start difference. First operand 11096 states and 49432 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) [2022-11-20 20:15:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:47,125 INFO L93 Difference]: Finished difference Result 11162 states and 49716 transitions. [2022-11-20 20:15:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:47,126 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 [2022-11-20 20:15:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:47,160 INFO L225 Difference]: With dead ends: 11162 [2022-11-20 20:15:47,160 INFO L226 Difference]: Without dead ends: 11162 [2022-11-20 20:15:47,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:47,160 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:47,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 20:15:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11162 states. [2022-11-20 20:15:47,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11162 to 11096. [2022-11-20 20:15:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 11087 states have (on average 4.458555064489943) internal successors, (49432), 11095 states have internal predecessors, (49432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 49432 transitions. [2022-11-20 20:15:47,542 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 49432 transitions. Word has length 13 [2022-11-20 20:15:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:47,542 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 49432 transitions. [2022-11-20 20:15:47,542 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) [2022-11-20 20:15:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 49432 transitions. [2022-11-20 20:15:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:47,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:47,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:47,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Ended with exit code 0 [2022-11-20 20:15:47,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:47,746 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash -807864014, now seen corresponding path program 2 times [2022-11-20 20:15:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:47,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730403280] [2022-11-20 20:15:47,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:15:47,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:47,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:47,748 INFO L229 MonitoredProcess]: Starting monitored process 231 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:47,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Waiting until timeout for monitored process [2022-11-20 20:15:48,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:15:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:48,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:48,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:48,326 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:48,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:48,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:48,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:48,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730403280] [2022-11-20 20:15:48,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730403280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:48,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:48,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:48,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201174132] [2022-11-20 20:15:48,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:48,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:48,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:48,681 INFO L87 Difference]: Start difference. First operand 11096 states and 49432 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) [2022-11-20 20:15:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:48,899 INFO L93 Difference]: Finished difference Result 11157 states and 49694 transitions. [2022-11-20 20:15:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:48,900 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 [2022-11-20 20:15:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:48,935 INFO L225 Difference]: With dead ends: 11157 [2022-11-20 20:15:48,935 INFO L226 Difference]: Without dead ends: 11157 [2022-11-20 20:15:48,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:48,936 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:48,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:15:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2022-11-20 20:15:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 11097. [2022-11-20 20:15:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 11088 states have (on average 4.458423520923521) internal successors, (49435), 11096 states have internal predecessors, (49435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 49435 transitions. [2022-11-20 20:15:49,159 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 49435 transitions. Word has length 13 [2022-11-20 20:15:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:49,159 INFO L495 AbstractCegarLoop]: Abstraction has 11097 states and 49435 transitions. [2022-11-20 20:15:49,159 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) [2022-11-20 20:15:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 49435 transitions. [2022-11-20 20:15:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:49,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:49,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:49,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Ended with exit code 0 [2022-11-20 20:15:49,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:49,363 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:49,363 INFO L85 PathProgramCache]: Analyzing trace with hash -807862898, now seen corresponding path program 1 times [2022-11-20 20:15:49,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:49,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938431382] [2022-11-20 20:15:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:49,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:49,364 INFO L229 MonitoredProcess]: Starting monitored process 232 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:49,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Waiting until timeout for monitored process [2022-11-20 20:15:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:49,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:49,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:49,938 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:49,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:50,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:50,406 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:50,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938431382] [2022-11-20 20:15:50,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938431382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:50,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:50,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:50,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497325783] [2022-11-20 20:15:50,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:50,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:50,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:50,407 INFO L87 Difference]: Start difference. First operand 11097 states and 49435 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) [2022-11-20 20:15:50,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:50,605 INFO L93 Difference]: Finished difference Result 11129 states and 49561 transitions. [2022-11-20 20:15:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:50,606 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 [2022-11-20 20:15:50,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:50,640 INFO L225 Difference]: With dead ends: 11129 [2022-11-20 20:15:50,640 INFO L226 Difference]: Without dead ends: 11129 [2022-11-20 20:15:50,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:50,640 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:50,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 20:15:50,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11129 states. [2022-11-20 20:15:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11129 to 11097. [2022-11-20 20:15:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 11088 states have (on average 4.458423520923521) internal successors, (49435), 11096 states have internal predecessors, (49435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 49435 transitions. [2022-11-20 20:15:50,857 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 49435 transitions. Word has length 13 [2022-11-20 20:15:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:50,857 INFO L495 AbstractCegarLoop]: Abstraction has 11097 states and 49435 transitions. [2022-11-20 20:15:50,857 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) [2022-11-20 20:15:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 49435 transitions. [2022-11-20 20:15:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:50,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:50,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:50,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Forceful destruction successful, exit code 0 [2022-11-20 20:15:51,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:51,073 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash -807712238, now seen corresponding path program 2 times [2022-11-20 20:15:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:51,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571665330] [2022-11-20 20:15:51,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:15:51,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:51,075 INFO L229 MonitoredProcess]: Starting monitored process 233 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:51,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Waiting until timeout for monitored process [2022-11-20 20:15:51,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:15:51,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:51,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:51,631 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:51,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:51,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:51,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:51,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571665330] [2022-11-20 20:15:51,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571665330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:51,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:51,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551005466] [2022-11-20 20:15:51,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:51,948 INFO L87 Difference]: Start difference. First operand 11097 states and 49435 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) [2022-11-20 20:15:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:52,285 INFO L93 Difference]: Finished difference Result 11167 states and 49700 transitions. [2022-11-20 20:15:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:52,286 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 [2022-11-20 20:15:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:52,332 INFO L225 Difference]: With dead ends: 11167 [2022-11-20 20:15:52,332 INFO L226 Difference]: Without dead ends: 11167 [2022-11-20 20:15:52,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:52,332 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:52,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 20:15:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11167 states. [2022-11-20 20:15:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11167 to 11097. [2022-11-20 20:15:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 11088 states have (on average 4.458423520923521) internal successors, (49435), 11096 states have internal predecessors, (49435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 49435 transitions. [2022-11-20 20:15:52,648 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 49435 transitions. Word has length 13 [2022-11-20 20:15:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:52,649 INFO L495 AbstractCegarLoop]: Abstraction has 11097 states and 49435 transitions. [2022-11-20 20:15:52,649 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) [2022-11-20 20:15:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 49435 transitions. [2022-11-20 20:15:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:52,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:52,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:52,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Ended with exit code 0 [2022-11-20 20:15:52,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:52,854 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash -804501134, now seen corresponding path program 3 times [2022-11-20 20:15:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669517474] [2022-11-20 20:15:52,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:52,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:52,856 INFO L229 MonitoredProcess]: Starting monitored process 234 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:52,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Waiting until timeout for monitored process [2022-11-20 20:15:53,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:15:53,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:53,444 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:53,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:15:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:53,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:53,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:53,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669517474] [2022-11-20 20:15:53,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669517474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:53,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:53,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035788723] [2022-11-20 20:15:53,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:53,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:53,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:53,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:53,783 INFO L87 Difference]: Start difference. First operand 11097 states and 49435 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) [2022-11-20 20:15:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:54,046 INFO L93 Difference]: Finished difference Result 11155 states and 49679 transitions. [2022-11-20 20:15:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:54,047 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 [2022-11-20 20:15:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:54,096 INFO L225 Difference]: With dead ends: 11155 [2022-11-20 20:15:54,096 INFO L226 Difference]: Without dead ends: 11155 [2022-11-20 20:15:54,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:54,096 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:54,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 20:15:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11155 states. [2022-11-20 20:15:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11155 to 11098. [2022-11-20 20:15:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11098 states, 11089 states have (on average 4.458292001082153) internal successors, (49438), 11097 states have internal predecessors, (49438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11098 states to 11098 states and 49438 transitions. [2022-11-20 20:15:54,446 INFO L78 Accepts]: Start accepts. Automaton has 11098 states and 49438 transitions. Word has length 13 [2022-11-20 20:15:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:54,446 INFO L495 AbstractCegarLoop]: Abstraction has 11098 states and 49438 transitions. [2022-11-20 20:15:54,446 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) [2022-11-20 20:15:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 11098 states and 49438 transitions. [2022-11-20 20:15:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:54,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:54,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:54,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Ended with exit code 0 [2022-11-20 20:15:54,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:54,650 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash -804500545, now seen corresponding path program 1 times [2022-11-20 20:15:54,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:54,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352246980] [2022-11-20 20:15:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:54,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:54,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:54,652 INFO L229 MonitoredProcess]: Starting monitored process 235 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:54,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Waiting until timeout for monitored process [2022-11-20 20:15:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:55,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:55,222 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:55,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:55,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:55,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:55,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352246980] [2022-11-20 20:15:55,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352246980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:55,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:55,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:55,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880987524] [2022-11-20 20:15:55,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:55,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:55,554 INFO L87 Difference]: Start difference. First operand 11098 states and 49438 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) [2022-11-20 20:15:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:55,798 INFO L93 Difference]: Finished difference Result 11118 states and 49508 transitions. [2022-11-20 20:15:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:55,799 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 [2022-11-20 20:15:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:55,839 INFO L225 Difference]: With dead ends: 11118 [2022-11-20 20:15:55,839 INFO L226 Difference]: Without dead ends: 11118 [2022-11-20 20:15:55,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:55,839 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:55,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:15:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2022-11-20 20:15:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 11099. [2022-11-20 20:15:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11099 states, 11090 states have (on average 4.458160504959423) internal successors, (49441), 11098 states have internal predecessors, (49441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11099 states to 11099 states and 49441 transitions. [2022-11-20 20:15:56,219 INFO L78 Accepts]: Start accepts. Automaton has 11099 states and 49441 transitions. Word has length 13 [2022-11-20 20:15:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:56,220 INFO L495 AbstractCegarLoop]: Abstraction has 11099 states and 49441 transitions. [2022-11-20 20:15:56,220 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) [2022-11-20 20:15:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11099 states and 49441 transitions. [2022-11-20 20:15:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:56,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:56,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:56,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Ended with exit code 0 [2022-11-20 20:15:56,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:56,423 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -804470785, now seen corresponding path program 2 times [2022-11-20 20:15:56,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:56,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587000718] [2022-11-20 20:15:56,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:15:56,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:56,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:56,425 INFO L229 MonitoredProcess]: Starting monitored process 236 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:56,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Waiting until timeout for monitored process [2022-11-20 20:15:56,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:15:56,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:56,973 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:56,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:57,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:57,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:57,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587000718] [2022-11-20 20:15:57,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587000718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:57,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:57,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348652095] [2022-11-20 20:15:57,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:57,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:57,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:57,272 INFO L87 Difference]: Start difference. First operand 11099 states and 49441 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) [2022-11-20 20:15:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:57,483 INFO L93 Difference]: Finished difference Result 11122 states and 49521 transitions. [2022-11-20 20:15:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:57,484 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 [2022-11-20 20:15:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:57,516 INFO L225 Difference]: With dead ends: 11122 [2022-11-20 20:15:57,517 INFO L226 Difference]: Without dead ends: 11122 [2022-11-20 20:15:57,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:57,517 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:57,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 20:15:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2022-11-20 20:15:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 11099. [2022-11-20 20:15:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11099 states, 11090 states have (on average 4.458160504959423) internal successors, (49441), 11098 states have internal predecessors, (49441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11099 states to 11099 states and 49441 transitions. [2022-11-20 20:15:57,730 INFO L78 Accepts]: Start accepts. Automaton has 11099 states and 49441 transitions. Word has length 13 [2022-11-20 20:15:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:57,730 INFO L495 AbstractCegarLoop]: Abstraction has 11099 states and 49441 transitions. [2022-11-20 20:15:57,731 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) [2022-11-20 20:15:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 11099 states and 49441 transitions. [2022-11-20 20:15:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:57,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:57,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:57,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Ended with exit code 0 [2022-11-20 20:15:57,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:57,934 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash -808238804, now seen corresponding path program 4 times [2022-11-20 20:15:57,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:57,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496219889] [2022-11-20 20:15:57,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:15:57,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:57,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:57,936 INFO L229 MonitoredProcess]: Starting monitored process 237 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:57,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Waiting until timeout for monitored process [2022-11-20 20:15:58,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:15:58,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:58,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:15:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:58,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:15:58,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:15:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:58,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:58,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:15:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496219889] [2022-11-20 20:15:58,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496219889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:58,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:58,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:58,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492138835] [2022-11-20 20:15:58,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:58,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:58,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:15:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:58,996 INFO L87 Difference]: Start difference. First operand 11099 states and 49441 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) [2022-11-20 20:15:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:59,227 INFO L93 Difference]: Finished difference Result 11203 states and 49840 transitions. [2022-11-20 20:15:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:59,228 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 [2022-11-20 20:15:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:59,267 INFO L225 Difference]: With dead ends: 11203 [2022-11-20 20:15:59,267 INFO L226 Difference]: Without dead ends: 11203 [2022-11-20 20:15:59,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:59,267 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:59,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-11-20 20:15:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2022-11-20 20:15:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 11098. [2022-11-20 20:15:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11098 states, 11089 states have (on average 4.458292001082153) internal successors, (49438), 11097 states have internal predecessors, (49438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11098 states to 11098 states and 49438 transitions. [2022-11-20 20:15:59,499 INFO L78 Accepts]: Start accepts. Automaton has 11098 states and 49438 transitions. Word has length 13 [2022-11-20 20:15:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:59,499 INFO L495 AbstractCegarLoop]: Abstraction has 11098 states and 49438 transitions. [2022-11-20 20:15:59,499 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) [2022-11-20 20:15:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 11098 states and 49438 transitions. [2022-11-20 20:15:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:15:59,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:59,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:59,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Forceful destruction successful, exit code 0 [2022-11-20 20:15:59,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:59,716 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:15:59,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 998759396, now seen corresponding path program 5 times [2022-11-20 20:15:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:15:59,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931653752] [2022-11-20 20:15:59,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:15:59,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:15:59,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:15:59,719 INFO L229 MonitoredProcess]: Starting monitored process 238 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:15:59,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Waiting until timeout for monitored process [2022-11-20 20:16:00,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:16:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:00,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:16:00,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:00,285 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:00,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:00,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:00,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:00,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931653752] [2022-11-20 20:16:00,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931653752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:00,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:00,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279918001] [2022-11-20 20:16:00,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:00,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:00,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:00,607 INFO L87 Difference]: Start difference. First operand 11098 states and 49438 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) [2022-11-20 20:16:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:00,929 INFO L93 Difference]: Finished difference Result 11158 states and 49696 transitions. [2022-11-20 20:16:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:00,930 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 [2022-11-20 20:16:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:00,967 INFO L225 Difference]: With dead ends: 11158 [2022-11-20 20:16:00,968 INFO L226 Difference]: Without dead ends: 11158 [2022-11-20 20:16:00,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:00,968 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:00,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 20:16:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11158 states. [2022-11-20 20:16:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11158 to 11104. [2022-11-20 20:16:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11104 states, 11095 states have (on average 4.457954033348355) internal successors, (49461), 11103 states have internal predecessors, (49461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11104 states to 11104 states and 49461 transitions. [2022-11-20 20:16:01,200 INFO L78 Accepts]: Start accepts. Automaton has 11104 states and 49461 transitions. Word has length 13 [2022-11-20 20:16:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:01,200 INFO L495 AbstractCegarLoop]: Abstraction has 11104 states and 49461 transitions. [2022-11-20 20:16:01,200 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) [2022-11-20 20:16:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11104 states and 49461 transitions. [2022-11-20 20:16:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:01,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:01,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:01,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Ended with exit code 0 [2022-11-20 20:16:01,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:01,404 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash 998792132, now seen corresponding path program 3 times [2022-11-20 20:16:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:01,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799121744] [2022-11-20 20:16:01,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:16:01,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:01,405 INFO L229 MonitoredProcess]: Starting monitored process 239 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:01,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Waiting until timeout for monitored process [2022-11-20 20:16:01,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:16:01,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:16:01,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:01,968 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:01,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:02,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:02,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:02,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799121744] [2022-11-20 20:16:02,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799121744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:02,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:02,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:02,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006609447] [2022-11-20 20:16:02,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:02,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:02,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:02,284 INFO L87 Difference]: Start difference. First operand 11104 states and 49461 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) [2022-11-20 20:16:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:02,499 INFO L93 Difference]: Finished difference Result 11132 states and 49572 transitions. [2022-11-20 20:16:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:02,500 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 [2022-11-20 20:16:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:02,537 INFO L225 Difference]: With dead ends: 11132 [2022-11-20 20:16:02,537 INFO L226 Difference]: Without dead ends: 11132 [2022-11-20 20:16:02,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:02,537 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:02,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-20 20:16:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2022-11-20 20:16:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 11105. [2022-11-20 20:16:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 11096 states have (on average 4.4580930064888245) internal successors, (49467), 11104 states have internal predecessors, (49467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 49467 transitions. [2022-11-20 20:16:02,921 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 49467 transitions. Word has length 13 [2022-11-20 20:16:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:02,922 INFO L495 AbstractCegarLoop]: Abstraction has 11105 states and 49467 transitions. [2022-11-20 20:16:02,922 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) [2022-11-20 20:16:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 49467 transitions. [2022-11-20 20:16:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:02,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:02,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:02,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Ended with exit code 0 [2022-11-20 20:16:03,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:03,127 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1103008676, now seen corresponding path program 6 times [2022-11-20 20:16:03,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:03,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821176631] [2022-11-20 20:16:03,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:16:03,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:03,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:03,129 INFO L229 MonitoredProcess]: Starting monitored process 240 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:03,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Waiting until timeout for monitored process [2022-11-20 20:16:03,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 20:16:03,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:03,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:16:03,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:03,722 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:03,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:04,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:04,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:04,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821176631] [2022-11-20 20:16:04,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821176631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:04,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:04,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:04,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43985304] [2022-11-20 20:16:04,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:04,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:04,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:04,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:04,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:04,050 INFO L87 Difference]: Start difference. First operand 11105 states and 49467 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) [2022-11-20 20:16:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:04,320 INFO L93 Difference]: Finished difference Result 11284 states and 50149 transitions. [2022-11-20 20:16:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:04,321 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 [2022-11-20 20:16:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:04,366 INFO L225 Difference]: With dead ends: 11284 [2022-11-20 20:16:04,366 INFO L226 Difference]: Without dead ends: 11284 [2022-11-20 20:16:04,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:04,367 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:04,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 9 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-20 20:16:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11284 states. [2022-11-20 20:16:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11284 to 11108. [2022-11-20 20:16:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11099 states have (on average 4.457879088206145) internal successors, (49478), 11107 states have internal predecessors, (49478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 49478 transitions. [2022-11-20 20:16:04,781 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 49478 transitions. Word has length 13 [2022-11-20 20:16:04,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:04,781 INFO L495 AbstractCegarLoop]: Abstraction has 11108 states and 49478 transitions. [2022-11-20 20:16:04,781 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) [2022-11-20 20:16:04,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 49478 transitions. [2022-11-20 20:16:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:04,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:04,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:04,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Ended with exit code 0 [2022-11-20 20:16:04,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:04,985 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash 987140906, now seen corresponding path program 7 times [2022-11-20 20:16:04,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:04,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303143957] [2022-11-20 20:16:04,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:16:04,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:04,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:04,987 INFO L229 MonitoredProcess]: Starting monitored process 241 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:04,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Waiting until timeout for monitored process [2022-11-20 20:16:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:16:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:05,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:05,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:16:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:05,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:05,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:05,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303143957] [2022-11-20 20:16:05,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303143957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:05,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:05,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:05,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510686173] [2022-11-20 20:16:05,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:05,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:05,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:05,888 INFO L87 Difference]: Start difference. First operand 11108 states and 49478 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) [2022-11-20 20:16:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:06,117 INFO L93 Difference]: Finished difference Result 11143 states and 49624 transitions. [2022-11-20 20:16:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:06,118 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 [2022-11-20 20:16:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:06,156 INFO L225 Difference]: With dead ends: 11143 [2022-11-20 20:16:06,156 INFO L226 Difference]: Without dead ends: 11143 [2022-11-20 20:16:06,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:06,157 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 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, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:06,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 20:16:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11143 states. [2022-11-20 20:16:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11143 to 11103. [2022-11-20 20:16:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11103 states, 11094 states have (on average 4.458175590409231) internal successors, (49459), 11102 states have internal predecessors, (49459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11103 states to 11103 states and 49459 transitions. [2022-11-20 20:16:06,391 INFO L78 Accepts]: Start accepts. Automaton has 11103 states and 49459 transitions. Word has length 13 [2022-11-20 20:16:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:06,391 INFO L495 AbstractCegarLoop]: Abstraction has 11103 states and 49459 transitions. [2022-11-20 20:16:06,391 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) [2022-11-20 20:16:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 11103 states and 49459 transitions. [2022-11-20 20:16:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:06,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:06,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:06,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Ended with exit code 0 [2022-11-20 20:16:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:06,595 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -930512750, now seen corresponding path program 1 times [2022-11-20 20:16:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339704180] [2022-11-20 20:16:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:06,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:06,597 INFO L229 MonitoredProcess]: Starting monitored process 242 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:06,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Waiting until timeout for monitored process [2022-11-20 20:16:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:07,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:16:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:07,281 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:07,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:07,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:07,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:07,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339704180] [2022-11-20 20:16:07,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339704180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:07,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:07,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:16:07,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560390172] [2022-11-20 20:16:07,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:07,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:16:07,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:16:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:07,527 INFO L87 Difference]: Start difference. First operand 11103 states and 49459 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:07,798 INFO L93 Difference]: Finished difference Result 11139 states and 49579 transitions. [2022-11-20 20:16:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:16:07,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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 [2022-11-20 20:16:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:07,835 INFO L225 Difference]: With dead ends: 11139 [2022-11-20 20:16:07,836 INFO L226 Difference]: Without dead ends: 11139 [2022-11-20 20:16:07,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:16:07,836 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:07,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-11-20 20:16:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11139 states. [2022-11-20 20:16:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11139 to 11117. [2022-11-20 20:16:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11117 states, 11108 states have (on average 4.456517824990997) internal successors, (49503), 11116 states have internal predecessors, (49503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11117 states to 11117 states and 49503 transitions. [2022-11-20 20:16:08,066 INFO L78 Accepts]: Start accepts. Automaton has 11117 states and 49503 transitions. Word has length 13 [2022-11-20 20:16:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:08,066 INFO L495 AbstractCegarLoop]: Abstraction has 11117 states and 49503 transitions. [2022-11-20 20:16:08,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 11117 states and 49503 transitions. [2022-11-20 20:16:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:08,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:08,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:08,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Ended with exit code 0 [2022-11-20 20:16:08,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:08,270 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:08,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1766790732, now seen corresponding path program 2 times [2022-11-20 20:16:08,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:08,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360627171] [2022-11-20 20:16:08,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:16:08,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:08,271 INFO L229 MonitoredProcess]: Starting monitored process 243 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:08,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Waiting until timeout for monitored process [2022-11-20 20:16:08,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:16:08,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:08,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:16:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:08,891 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:08,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:09,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:09,120 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:09,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360627171] [2022-11-20 20:16:09,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360627171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:09,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:09,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:16:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361695237] [2022-11-20 20:16:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:09,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:16:09,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:09,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:16:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:09,122 INFO L87 Difference]: Start difference. First operand 11117 states and 49503 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:09,389 INFO L93 Difference]: Finished difference Result 11125 states and 49528 transitions. [2022-11-20 20:16:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:16:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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 [2022-11-20 20:16:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:09,423 INFO L225 Difference]: With dead ends: 11125 [2022-11-20 20:16:09,423 INFO L226 Difference]: Without dead ends: 11125 [2022-11-20 20:16:09,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:16:09,423 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:09,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-20 20:16:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11125 states. [2022-11-20 20:16:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11125 to 11118. [2022-11-20 20:16:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11118 states, 11109 states have (on average 4.456386713475561) internal successors, (49506), 11117 states have internal predecessors, (49506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11118 states to 11118 states and 49506 transitions. [2022-11-20 20:16:09,717 INFO L78 Accepts]: Start accepts. Automaton has 11118 states and 49506 transitions. Word has length 13 [2022-11-20 20:16:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:09,717 INFO L495 AbstractCegarLoop]: Abstraction has 11118 states and 49506 transitions. [2022-11-20 20:16:09,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 11118 states and 49506 transitions. [2022-11-20 20:16:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:09,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:09,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:09,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Ended with exit code 0 [2022-11-20 20:16:09,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:09,920 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1644855988, now seen corresponding path program 8 times [2022-11-20 20:16:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921119082] [2022-11-20 20:16:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:16:09,921 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 [2022-11-20 20:16:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:09,922 INFO L229 MonitoredProcess]: Starting monitored process 244 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:09,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Waiting until timeout for monitored process [2022-11-20 20:16:10,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:16:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:10,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:16:10,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:10,512 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:10,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:10,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:10,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921119082] [2022-11-20 20:16:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921119082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:10,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:10,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:10,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202815755] [2022-11-20 20:16:10,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:10,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:10,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:10,855 INFO L87 Difference]: Start difference. First operand 11118 states and 49506 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) [2022-11-20 20:16:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:11,081 INFO L93 Difference]: Finished difference Result 11184 states and 49787 transitions. [2022-11-20 20:16:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:11,082 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 [2022-11-20 20:16:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:11,121 INFO L225 Difference]: With dead ends: 11184 [2022-11-20 20:16:11,121 INFO L226 Difference]: Without dead ends: 11184 [2022-11-20 20:16:11,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:11,121 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:11,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 20:16:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11184 states. [2022-11-20 20:16:11,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11184 to 11116. [2022-11-20 20:16:11,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11116 states, 11107 states have (on average 4.456558926802917) internal successors, (49499), 11115 states have internal predecessors, (49499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11116 states to 11116 states and 49499 transitions. [2022-11-20 20:16:11,370 INFO L78 Accepts]: Start accepts. Automaton has 11116 states and 49499 transitions. Word has length 13 [2022-11-20 20:16:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:11,370 INFO L495 AbstractCegarLoop]: Abstraction has 11116 states and 49499 transitions. [2022-11-20 20:16:11,370 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) [2022-11-20 20:16:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 11116 states and 49499 transitions. [2022-11-20 20:16:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:11,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:11,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:11,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Ended with exit code 0 [2022-11-20 20:16:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:11,575 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1678102744, now seen corresponding path program 4 times [2022-11-20 20:16:11,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:11,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25999948] [2022-11-20 20:16:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:11,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:11,576 INFO L229 MonitoredProcess]: Starting monitored process 245 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:11,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Waiting until timeout for monitored process [2022-11-20 20:16:12,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:12,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:12,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 20:16:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:12,229 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:12,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 20:16:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:12,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:12,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25999948] [2022-11-20 20:16:12,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25999948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:12,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:12,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:12,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967788071] [2022-11-20 20:16:12,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:12,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:12,572 INFO L87 Difference]: Start difference. First operand 11116 states and 49499 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) [2022-11-20 20:16:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:12,815 INFO L93 Difference]: Finished difference Result 11185 states and 49758 transitions. [2022-11-20 20:16:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:12,816 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 [2022-11-20 20:16:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:12,864 INFO L225 Difference]: With dead ends: 11185 [2022-11-20 20:16:12,865 INFO L226 Difference]: Without dead ends: 11185 [2022-11-20 20:16:12,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:12,865 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:12,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 20:16:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11185 states. [2022-11-20 20:16:13,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11185 to 11114. [2022-11-20 20:16:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11105 states have (on average 4.456551103106709) internal successors, (49490), 11113 states have internal predecessors, (49490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 49490 transitions. [2022-11-20 20:16:13,197 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 49490 transitions. Word has length 13 [2022-11-20 20:16:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:13,197 INFO L495 AbstractCegarLoop]: Abstraction has 11114 states and 49490 transitions. [2022-11-20 20:16:13,197 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) [2022-11-20 20:16:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 49490 transitions. [2022-11-20 20:16:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:13,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:13,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:13,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Ended with exit code 0 [2022-11-20 20:16:13,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:13,402 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1149873315, now seen corresponding path program 1 times [2022-11-20 20:16:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892908648] [2022-11-20 20:16:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:13,403 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 [2022-11-20 20:16:13,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:13,404 INFO L229 MonitoredProcess]: Starting monitored process 246 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:13,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Waiting until timeout for monitored process [2022-11-20 20:16:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:13,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:16:13,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:14,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:14,043 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 [2022-11-20 20:16:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:14,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:14,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:14,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892908648] [2022-11-20 20:16:14,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892908648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:14,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:14,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:16:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113128807] [2022-11-20 20:16:14,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:14,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:16:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:16:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:14,312 INFO L87 Difference]: Start difference. First operand 11114 states and 49490 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:14,611 INFO L93 Difference]: Finished difference Result 11119 states and 49508 transitions. [2022-11-20 20:16:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:16:14,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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 [2022-11-20 20:16:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:14,654 INFO L225 Difference]: With dead ends: 11119 [2022-11-20 20:16:14,654 INFO L226 Difference]: Without dead ends: 11119 [2022-11-20 20:16:14,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:16:14,655 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:14,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 17 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-20 20:16:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-11-20 20:16:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 11117. [2022-11-20 20:16:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11117 states, 11108 states have (on average 4.456337774576881) internal successors, (49501), 11116 states have internal predecessors, (49501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11117 states to 11117 states and 49501 transitions. [2022-11-20 20:16:14,941 INFO L78 Accepts]: Start accepts. Automaton has 11117 states and 49501 transitions. Word has length 13 [2022-11-20 20:16:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:14,941 INFO L495 AbstractCegarLoop]: Abstraction has 11117 states and 49501 transitions. [2022-11-20 20:16:14,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 11117 states and 49501 transitions. [2022-11-20 20:16:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:14,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:14,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:14,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Ended with exit code 0 [2022-11-20 20:16:15,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:15,144 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash 789700125, now seen corresponding path program 2 times [2022-11-20 20:16:15,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:15,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248144374] [2022-11-20 20:16:15,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 20:16:15,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:15,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:15,146 INFO L229 MonitoredProcess]: Starting monitored process 247 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:15,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Waiting until timeout for monitored process [2022-11-20 20:16:15,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 20:16:15,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:15,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:16:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:15,810 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:15,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:16,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:16,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:16,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248144374] [2022-11-20 20:16:16,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248144374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:16,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:16,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:16:16,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849779612] [2022-11-20 20:16:16,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:16,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:16,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:16,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:16,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:16,014 INFO L87 Difference]: Start difference. First operand 11117 states and 49501 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:16,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:16,282 INFO L93 Difference]: Finished difference Result 11120 states and 49501 transitions. [2022-11-20 20:16:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2022-11-20 20:16:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:16,323 INFO L225 Difference]: With dead ends: 11120 [2022-11-20 20:16:16,323 INFO L226 Difference]: Without dead ends: 11120 [2022-11-20 20:16:16,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:16,323 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:16,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 20:16:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11120 states. [2022-11-20 20:16:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11120 to 11111. [2022-11-20 20:16:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11111 states, 11102 states have (on average 4.455773734462259) internal successors, (49468), 11110 states have internal predecessors, (49468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11111 states to 11111 states and 49468 transitions. [2022-11-20 20:16:16,570 INFO L78 Accepts]: Start accepts. Automaton has 11111 states and 49468 transitions. Word has length 13 [2022-11-20 20:16:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:16,571 INFO L495 AbstractCegarLoop]: Abstraction has 11111 states and 49468 transitions. [2022-11-20 20:16:16,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 11111 states and 49468 transitions. [2022-11-20 20:16:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:16,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:16,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:16,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Ended with exit code 0 [2022-11-20 20:16:16,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:16,775 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:16,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:16,775 INFO L85 PathProgramCache]: Analyzing trace with hash -923291767, now seen corresponding path program 3 times [2022-11-20 20:16:16,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:16,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863449180] [2022-11-20 20:16:16,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:16:16,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:16,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:16,776 INFO L229 MonitoredProcess]: Starting monitored process 248 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:16,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (248)] Waiting until timeout for monitored process [2022-11-20 20:16:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:16:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:16:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:17,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:17,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:17,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:17,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863449180] [2022-11-20 20:16:17,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863449180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:17,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:17,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:16:17,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926201278] [2022-11-20 20:16:17,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:17,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:17,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:17,591 INFO L87 Difference]: Start difference. First operand 11111 states and 49468 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:17,872 INFO L93 Difference]: Finished difference Result 11144 states and 49567 transitions. [2022-11-20 20:16:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2022-11-20 20:16:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:17,914 INFO L225 Difference]: With dead ends: 11144 [2022-11-20 20:16:17,914 INFO L226 Difference]: Without dead ends: 11144 [2022-11-20 20:16:17,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:17,915 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:17,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-11-20 20:16:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11144 states. [2022-11-20 20:16:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11144 to 11129. [2022-11-20 20:16:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11129 states, 11120 states have (on average 4.453237410071942) internal successors, (49520), 11128 states have internal predecessors, (49520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 49520 transitions. [2022-11-20 20:16:18,165 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 49520 transitions. Word has length 13 [2022-11-20 20:16:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:18,165 INFO L495 AbstractCegarLoop]: Abstraction has 11129 states and 49520 transitions. [2022-11-20 20:16:18,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 49520 transitions. [2022-11-20 20:16:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:18,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:18,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:18,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (248)] Ended with exit code 0 [2022-11-20 20:16:18,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:18,370 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash -875346, now seen corresponding path program 3 times [2022-11-20 20:16:18,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:18,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678626513] [2022-11-20 20:16:18,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:16:18,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:18,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:18,371 INFO L229 MonitoredProcess]: Starting monitored process 249 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:18,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (249)] Waiting until timeout for monitored process [2022-11-20 20:16:18,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:16:18,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:16:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:19,015 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:19,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:19,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:19,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678626513] [2022-11-20 20:16:19,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678626513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:19,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:19,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:16:19,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418842986] [2022-11-20 20:16:19,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:19,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:16:19,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:16:19,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:19,262 INFO L87 Difference]: Start difference. First operand 11129 states and 49520 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:19,562 INFO L93 Difference]: Finished difference Result 11131 states and 49526 transitions. [2022-11-20 20:16:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:16:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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 [2022-11-20 20:16:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:19,607 INFO L225 Difference]: With dead ends: 11131 [2022-11-20 20:16:19,607 INFO L226 Difference]: Without dead ends: 11131 [2022-11-20 20:16:19,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:16:19,608 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:19,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 20:16:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11131 states. [2022-11-20 20:16:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11131 to 11131. [2022-11-20 20:16:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11131 states, 11122 states have (on average 4.45297608343823) internal successors, (49526), 11130 states have internal predecessors, (49526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11131 states to 11131 states and 49526 transitions. [2022-11-20 20:16:19,859 INFO L78 Accepts]: Start accepts. Automaton has 11131 states and 49526 transitions. Word has length 13 [2022-11-20 20:16:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:19,860 INFO L495 AbstractCegarLoop]: Abstraction has 11131 states and 49526 transitions. [2022-11-20 20:16:19,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11131 states and 49526 transitions. [2022-11-20 20:16:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:19,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:19,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:19,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (249)] Ended with exit code 0 [2022-11-20 20:16:20,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:20,064 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1078105433, now seen corresponding path program 4 times [2022-11-20 20:16:20,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:20,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922836489] [2022-11-20 20:16:20,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:20,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:20,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:20,066 INFO L229 MonitoredProcess]: Starting monitored process 250 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:20,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (250)] Waiting until timeout for monitored process [2022-11-20 20:16:20,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:20,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:20,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:16:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:20,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:20,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:20,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:20,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922836489] [2022-11-20 20:16:20,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922836489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:20,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:20,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:16:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906598072] [2022-11-20 20:16:20,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:20,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:16:20,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:20,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:16:20,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:20,971 INFO L87 Difference]: Start difference. First operand 11131 states and 49526 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:21,257 INFO L93 Difference]: Finished difference Result 11138 states and 49553 transitions. [2022-11-20 20:16:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:16:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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 [2022-11-20 20:16:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:21,296 INFO L225 Difference]: With dead ends: 11138 [2022-11-20 20:16:21,297 INFO L226 Difference]: Without dead ends: 11138 [2022-11-20 20:16:21,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:16:21,297 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:21,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-20 20:16:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11138 states. [2022-11-20 20:16:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11138 to 11130. [2022-11-20 20:16:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11130 states, 11121 states have (on average 4.452926895063394) internal successors, (49521), 11129 states have internal predecessors, (49521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11130 states to 11130 states and 49521 transitions. [2022-11-20 20:16:21,524 INFO L78 Accepts]: Start accepts. Automaton has 11130 states and 49521 transitions. Word has length 13 [2022-11-20 20:16:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:21,524 INFO L495 AbstractCegarLoop]: Abstraction has 11130 states and 49521 transitions. [2022-11-20 20:16:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11130 states and 49521 transitions. [2022-11-20 20:16:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:21,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:21,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:21,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (250)] Ended with exit code 0 [2022-11-20 20:16:21,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:21,728 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:21,728 INFO L85 PathProgramCache]: Analyzing trace with hash -914552843, now seen corresponding path program 5 times [2022-11-20 20:16:21,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:21,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792957021] [2022-11-20 20:16:21,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:16:21,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:21,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:21,730 INFO L229 MonitoredProcess]: Starting monitored process 251 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:21,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (251)] Waiting until timeout for monitored process [2022-11-20 20:16:22,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:16:22,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:16:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:22,357 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:22,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:22,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:22,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792957021] [2022-11-20 20:16:22,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792957021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:22,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:22,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:16:22,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734700048] [2022-11-20 20:16:22,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:22,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:22,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:22,624 INFO L87 Difference]: Start difference. First operand 11130 states and 49521 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:22,919 INFO L93 Difference]: Finished difference Result 11133 states and 49527 transitions. [2022-11-20 20:16:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2022-11-20 20:16:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:22,964 INFO L225 Difference]: With dead ends: 11133 [2022-11-20 20:16:22,965 INFO L226 Difference]: Without dead ends: 11133 [2022-11-20 20:16:22,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:22,965 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:22,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-20 20:16:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11133 states. [2022-11-20 20:16:23,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11133 to 11129. [2022-11-20 20:16:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11129 states, 11120 states have (on average 4.452787769784172) internal successors, (49515), 11128 states have internal predecessors, (49515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11129 states to 11129 states and 49515 transitions. [2022-11-20 20:16:23,317 INFO L78 Accepts]: Start accepts. Automaton has 11129 states and 49515 transitions. Word has length 13 [2022-11-20 20:16:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:23,317 INFO L495 AbstractCegarLoop]: Abstraction has 11129 states and 49515 transitions. [2022-11-20 20:16:23,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 11129 states and 49515 transitions. [2022-11-20 20:16:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:23,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:23,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:23,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (251)] Ended with exit code 0 [2022-11-20 20:16:23,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:23,522 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:23,523 INFO L85 PathProgramCache]: Analyzing trace with hash -964868668, now seen corresponding path program 4 times [2022-11-20 20:16:23,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:23,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947969466] [2022-11-20 20:16:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:23,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:23,525 INFO L229 MonitoredProcess]: Starting monitored process 252 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:23,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (252)] Waiting until timeout for monitored process [2022-11-20 20:16:23,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:16:24,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:24,174 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:24,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:24,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:24,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:24,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947969466] [2022-11-20 20:16:24,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947969466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:24,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:24,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:16:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889761283] [2022-11-20 20:16:24,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:24,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:24,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:24,367 INFO L87 Difference]: Start difference. First operand 11129 states and 49515 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:24,666 INFO L93 Difference]: Finished difference Result 11159 states and 49600 transitions. [2022-11-20 20:16:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2022-11-20 20:16:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:24,710 INFO L225 Difference]: With dead ends: 11159 [2022-11-20 20:16:24,710 INFO L226 Difference]: Without dead ends: 11159 [2022-11-20 20:16:24,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:24,711 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:24,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-20 20:16:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11159 states. [2022-11-20 20:16:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11159 to 11124. [2022-11-20 20:16:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11115 states have (on average 4.452991452991453) internal successors, (49495), 11123 states have internal predecessors, (49495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 49495 transitions. [2022-11-20 20:16:24,969 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 49495 transitions. Word has length 13 [2022-11-20 20:16:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:24,970 INFO L495 AbstractCegarLoop]: Abstraction has 11124 states and 49495 transitions. [2022-11-20 20:16:24,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 49495 transitions. [2022-11-20 20:16:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:24,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:24,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:24,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (252)] Ended with exit code 0 [2022-11-20 20:16:25,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:25,174 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:25,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1591953110, now seen corresponding path program 5 times [2022-11-20 20:16:25,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:25,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968563045] [2022-11-20 20:16:25,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:16:25,174 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:25,175 INFO L229 MonitoredProcess]: Starting monitored process 253 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:25,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (253)] Waiting until timeout for monitored process [2022-11-20 20:16:25,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:16:25,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:25,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:16:25,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:25,821 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:25,821 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 [2022-11-20 20:16:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:26,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:26,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:26,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968563045] [2022-11-20 20:16:26,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968563045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:26,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:26,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:16:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644039532] [2022-11-20 20:16:26,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:26,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:16:26,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:16:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:26,062 INFO L87 Difference]: Start difference. First operand 11124 states and 49495 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:26,358 INFO L93 Difference]: Finished difference Result 11124 states and 49494 transitions. [2022-11-20 20:16:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:16:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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 [2022-11-20 20:16:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:26,396 INFO L225 Difference]: With dead ends: 11124 [2022-11-20 20:16:26,396 INFO L226 Difference]: Without dead ends: 11124 [2022-11-20 20:16:26,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:16:26,397 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:26,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-20 20:16:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11124 states. [2022-11-20 20:16:26,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11124 to 11124. [2022-11-20 20:16:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11115 states have (on average 4.4529014844804315) internal successors, (49494), 11123 states have internal predecessors, (49494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 49494 transitions. [2022-11-20 20:16:26,637 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 49494 transitions. Word has length 13 [2022-11-20 20:16:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:26,637 INFO L495 AbstractCegarLoop]: Abstraction has 11124 states and 49494 transitions. [2022-11-20 20:16:26,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-20 20:16:26,638 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 49494 transitions. [2022-11-20 20:16:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:26,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:26,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:26,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (253)] Ended with exit code 0 [2022-11-20 20:16:26,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:26,843 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash 514723023, now seen corresponding path program 6 times [2022-11-20 20:16:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136474202] [2022-11-20 20:16:26,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 20:16:26,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:26,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:26,845 INFO L229 MonitoredProcess]: Starting monitored process 254 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:26,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (254)] Waiting until timeout for monitored process [2022-11-20 20:16:27,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-20 20:16:27,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 20:16:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:27,429 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:27,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:16:27,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:16:27,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:27,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136474202] [2022-11-20 20:16:27,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1136474202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:27,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:27,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:16:27,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550180141] [2022-11-20 20:16:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:27,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:16:27,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:27,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:16:27,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:27,631 INFO L87 Difference]: Start difference. First operand 11124 states and 49494 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:27,924 INFO L93 Difference]: Finished difference Result 11072 states and 49309 transitions. [2022-11-20 20:16:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2022-11-20 20:16:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:27,962 INFO L225 Difference]: With dead ends: 11072 [2022-11-20 20:16:27,962 INFO L226 Difference]: Without dead ends: 11072 [2022-11-20 20:16:27,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:16:27,963 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:27,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-20 20:16:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2022-11-20 20:16:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 11066. [2022-11-20 20:16:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11066 states, 11057 states have (on average 4.457447770643031) internal successors, (49286), 11065 states have internal predecessors, (49286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11066 states to 11066 states and 49286 transitions. [2022-11-20 20:16:28,198 INFO L78 Accepts]: Start accepts. Automaton has 11066 states and 49286 transitions. Word has length 13 [2022-11-20 20:16:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:28,198 INFO L495 AbstractCegarLoop]: Abstraction has 11066 states and 49286 transitions. [2022-11-20 20:16:28,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2022-11-20 20:16:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 11066 states and 49286 transitions. [2022-11-20 20:16:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:16:28,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:28,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:28,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (254)] Ended with exit code 0 [2022-11-20 20:16:28,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:28,402 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1643206898, now seen corresponding path program 4 times [2022-11-20 20:16:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:28,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988753346] [2022-11-20 20:16:28,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:28,403 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 [2022-11-20 20:16:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:28,404 INFO L229 MonitoredProcess]: Starting monitored process 255 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:28,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (255)] Waiting until timeout for monitored process [2022-11-20 20:16:28,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:28,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:16:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:16:29,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:29,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-20 20:16:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:16:29,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:29,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988753346] [2022-11-20 20:16:29,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988753346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:29,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1606326155] [2022-11-20 20:16:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:29,809 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:16:29,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:16:29,811 INFO L229 MonitoredProcess]: Starting monitored process 256 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:16:29,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (256)] Waiting until timeout for monitored process [2022-11-20 20:16:30,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:30,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:16:30,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:30,923 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:30,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:16:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:31,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:32,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1606326155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:32,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899307367] [2022-11-20 20:16:32,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:32,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:32,611 INFO L229 MonitoredProcess]: Starting monitored process 257 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:32,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-11-20 20:16:33,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:33,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:16:33,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:16:33,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:33,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-20 20:16:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:16:33,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899307367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:33,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:16:33,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6, 6, 7, 7] total 24 [2022-11-20 20:16:33,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153579271] [2022-11-20 20:16:33,380 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:33,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 20:16:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:16:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 20:16:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:16:33,381 INFO L87 Difference]: Start difference. First operand 11066 states and 49286 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:55,685 INFO L93 Difference]: Finished difference Result 21184 states and 94392 transitions. [2022-11-20 20:16:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 20:16:55,688 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:16:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:55,781 INFO L225 Difference]: With dead ends: 21184 [2022-11-20 20:16:55,781 INFO L226 Difference]: Without dead ends: 21184 [2022-11-20 20:16:55,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=847, Invalid=5315, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 20:16:55,783 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 677 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:55,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 321 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1861 Invalid, 0 Unknown, 975 Unchecked, 10.5s Time] [2022-11-20 20:16:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2022-11-20 20:16:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 12952. [2022-11-20 20:16:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12952 states, 12943 states have (on average 4.555898941512787) internal successors, (58967), 12951 states have internal predecessors, (58967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12952 states to 12952 states and 58967 transitions. [2022-11-20 20:16:56,259 INFO L78 Accepts]: Start accepts. Automaton has 12952 states and 58967 transitions. Word has length 14 [2022-11-20 20:16:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:56,259 INFO L495 AbstractCegarLoop]: Abstraction has 12952 states and 58967 transitions. [2022-11-20 20:16:56,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 12952 states and 58967 transitions. [2022-11-20 20:16:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:16:56,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:56,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:56,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (256)] Ended with exit code 0 [2022-11-20 20:16:56,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (255)] Ended with exit code 0 [2022-11-20 20:16:56,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-11-20 20:16:56,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,255 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,257 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:56,865 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 20:16:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1640953508, now seen corresponding path program 5 times [2022-11-20 20:16:56,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:16:56,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320905663] [2022-11-20 20:16:56,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:16:56,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:16:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:16:56,866 INFO L229 MonitoredProcess]: Starting monitored process 258 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:16:56,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (258)] Waiting until timeout for monitored process [2022-11-20 20:16:57,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:16:57,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:57,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:16:57,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:16:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:57,710 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 35 treesize of output 31 [2022-11-20 20:16:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:16:58,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:16:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320905663] [2022-11-20 20:16:58,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320905663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:58,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1356094524] [2022-11-20 20:16:58,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:16:58,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:16:58,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:16:58,494 INFO L229 MonitoredProcess]: Starting monitored process 259 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:16:58,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (259)] Waiting until timeout for monitored process [2022-11-20 20:16:59,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:16:59,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:59,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:16:59,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:59,924 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 20:16:59,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-20 20:17:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:00,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:01,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1356094524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622020700] [2022-11-20 20:17:01,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 20:17:01,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:17:01,875 INFO L229 MonitoredProcess]: Starting monitored process 260 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:17:01,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e0e1ccd-cbdb-4d4d-8318-2c6bdfc9d6cf/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-11-20 20:17:02,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 20:17:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:17:02,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:17:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:17:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:17:02,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:02,549 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 35 treesize of output 31 [2022-11-20 20:17:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:17:02,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622020700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:02,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 20:17:02,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6, 6, 7, 7] total 25 [2022-11-20 20:17:02,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530234870] [2022-11-20 20:17:02,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 20:17:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 20:17:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:17:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 20:17:02,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:17:02,697 INFO L87 Difference]: Start difference. First operand 12952 states and 58967 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)