./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:44:37,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:44:37,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:44:37,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:44:37,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:44:37,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:44:37,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:44:37,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:44:37,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:44:37,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:44:37,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:44:37,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:44:37,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:44:37,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:44:37,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:44:37,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:44:37,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:44:37,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:44:37,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:44:37,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:44:37,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:44:37,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:44:37,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:44:37,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:44:37,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:44:38,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:44:38,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:44:38,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:44:38,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:44:38,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:44:38,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:44:38,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:44:38,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:44:38,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:44:38,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:44:38,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:44:38,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:44:38,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:44:38,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:44:38,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:44:38,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:44:38,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:44:38,060 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:44:38,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:44:38,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:44:38,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:44:38,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:44:38,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:44:38,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:44:38,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:44:38,064 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:44:38,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:44:38,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:44:38,066 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:44:38,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:44:38,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:44:38,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:44:38,066 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:44:38,067 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:44:38,067 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:44:38,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:44:38,067 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:44:38,068 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:44:38,068 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:44:38,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:44:38,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:44:38,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:44:38,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:44:38,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:44:38,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:44:38,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:44:38,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:44:38,070 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_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-11-16 12:44:38,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:44:38,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:44:38,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:44:38,384 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:44:38,386 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:44:38,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 12:44:38,460 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/d3d3342a5/602b5ca561b64baea7bd7a3194c0e75d/FLAGb478a7741 [2022-11-16 12:44:38,994 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:44:38,994 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 12:44:39,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/d3d3342a5/602b5ca561b64baea7bd7a3194c0e75d/FLAGb478a7741 [2022-11-16 12:44:39,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/d3d3342a5/602b5ca561b64baea7bd7a3194c0e75d [2022-11-16 12:44:39,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:44:39,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:44:39,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:44:39,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:44:39,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:44:39,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:44:39" (1/1) ... [2022-11-16 12:44:39,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249604b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:39, skipping insertion in model container [2022-11-16 12:44:39,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:44:39" (1/1) ... [2022-11-16 12:44:39,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:44:39,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:44:39,655 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-16 12:44:39,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:44:39,674 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-16 12:44:39,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4652ad0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:39, skipping insertion in model container [2022-11-16 12:44:39,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:44:39,675 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 12:44:39,677 INFO L158 Benchmark]: Toolchain (without parser) took 330.19ms. Allocated memory is still 140.5MB. Free memory was 103.4MB in the beginning and 116.1MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:44:39,678 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 140.5MB. Free memory was 120.9MB in the beginning and 120.8MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:44:39,679 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.26ms. Allocated memory is still 140.5MB. Free memory was 103.1MB in the beginning and 116.1MB in the end (delta: -13.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:44:39,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 140.5MB. Free memory was 120.9MB in the beginning and 120.8MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 325.26ms. Allocated memory is still 140.5MB. Free memory was 103.1MB in the beginning and 116.1MB in the end (delta: -13.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 163]: 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_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:44:41,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:44:41,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:44:41,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:44:41,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:44:41,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:44:41,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:44:41,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:44:41,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:44:41,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:44:41,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:44:41,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:44:41,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:44:41,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:44:41,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:44:41,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:44:41,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:44:41,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:44:41,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:44:41,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:44:41,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:44:41,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:44:41,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:44:41,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:44:41,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:44:41,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:44:41,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:44:41,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:44:41,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:44:41,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:44:41,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:44:41,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:44:41,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:44:41,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:44:41,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:44:41,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:44:41,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:44:41,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:44:41,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:44:41,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:44:41,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:44:41,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 12:44:42,017 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:44:42,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:44:42,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:44:42,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:44:42,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:44:42,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:44:42,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:44:42,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:44:42,023 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:44:42,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:44:42,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:44:42,025 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:44:42,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:44:42,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:44:42,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:44:42,026 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:44:42,026 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:44:42,026 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:44:42,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:44:42,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:44:42,027 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 12:44:42,027 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 12:44:42,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:44:42,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:44:42,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:44:42,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:44:42,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:44:42,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:44:42,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:44:42,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:44:42,029 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 12:44:42,030 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 12:44:42,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 12:44:42,030 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_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-11-16 12:44:42,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:44:42,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:44:42,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:44:42,443 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:44:42,446 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:44:42,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 12:44:42,509 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/61e2d6e43/e6e685a9ba2c4683a16e8599fd536cc3/FLAG7f5896e78 [2022-11-16 12:44:43,062 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:44:43,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 12:44:43,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/61e2d6e43/e6e685a9ba2c4683a16e8599fd536cc3/FLAG7f5896e78 [2022-11-16 12:44:43,416 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/data/61e2d6e43/e6e685a9ba2c4683a16e8599fd536cc3 [2022-11-16 12:44:43,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:44:43,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:44:43,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:44:43,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:44:43,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:44:43,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0cd6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43, skipping insertion in model container [2022-11-16 12:44:43,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:44:43,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:44:43,736 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-16 12:44:43,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:44:43,756 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 12:44:43,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:44:43,780 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-16 12:44:43,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:44:43,790 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:44:43,817 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-11-16 12:44:43,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:44:43,847 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:44:43,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43 WrapperNode [2022-11-16 12:44:43,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:44:43,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:44:43,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:44:43,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:44:43,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,921 INFO L138 Inliner]: procedures = 28, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 306 [2022-11-16 12:44:43,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:44:43,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:44:43,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:44:43,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:44:43,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,956 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:44:43,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:44:43,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:44:43,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:44:43,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (1/1) ... [2022-11-16 12:44:43,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:44:43,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:43,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:44:44,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:44:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:44:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 12:44:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:44:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 12:44:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:44:44,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:44:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:44:44,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:44:44,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:44:44,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:44:44,033 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 12:44:44,033 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 12:44:44,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:44:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:44:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:44:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:44:44,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:44:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:44:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 12:44:44,036 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:44:44,169 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:44:44,171 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:44:45,074 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:44:45,295 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:44:45,295 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:44:45,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:44:45 BoogieIcfgContainer [2022-11-16 12:44:45,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:44:45,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:44:45,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:44:45,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:44:45,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:44:43" (1/3) ... [2022-11-16 12:44:45,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f3b68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:44:45, skipping insertion in model container [2022-11-16 12:44:45,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:44:43" (2/3) ... [2022-11-16 12:44:45,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f3b68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:44:45, skipping insertion in model container [2022-11-16 12:44:45,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:44:45" (3/3) ... [2022-11-16 12:44:45,307 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-11-16 12:44:45,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:44:45,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-16 12:44:45,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:44:45,464 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:44:45,519 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:44:45,540 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 268 transitions, 568 flow [2022-11-16 12:44:45,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 268 transitions, 568 flow [2022-11-16 12:44:45,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 268 transitions, 568 flow [2022-11-16 12:44:45,685 INFO L130 PetriNetUnfolder]: 19/264 cut-off events. [2022-11-16 12:44:45,685 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:44:45,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 264 events. 19/264 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 226 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 212. Up to 2 conditions per place. [2022-11-16 12:44:45,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 3392 [2022-11-16 12:45:19,843 WARN L233 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 119 DAG size of output: 118 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 12:45:27,791 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 125 DAG size of output: 124 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-16 12:45:30,310 INFO L134 LiptonReduction]: Checked pairs total: 7180 [2022-11-16 12:45:30,310 INFO L136 LiptonReduction]: Total number of compositions: 268 [2022-11-16 12:45:30,318 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 71 transitions, 174 flow [2022-11-16 12:45:30,758 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7261 states, 6855 states have (on average 4.742669584245077) internal successors, (32511), 7260 states have internal predecessors, (32511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:30,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:45:30,788 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;@66667f41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:45:30,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-16 12:45:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 7261 states, 6855 states have (on average 4.742669584245077) internal successors, (32511), 7260 states have internal predecessors, (32511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:45:30,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:30,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:45:30,832 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:30,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash 39875, now seen corresponding path program 1 times [2022-11-16 12:45:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:30,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715347548] [2022-11-16 12:45:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:30,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:30,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:30,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:30,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 12:45:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:45:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:31,276 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:45:31,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:45:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:31,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:31,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:31,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715347548] [2022-11-16 12:45:31,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715347548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:31,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:31,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:45:31,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405796236] [2022-11-16 12:45:31,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:31,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:45:31,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:45:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:31,387 INFO L87 Difference]: Start difference. First operand has 7261 states, 6855 states have (on average 4.742669584245077) internal successors, (32511), 7260 states have internal predecessors, (32511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:31,939 INFO L93 Difference]: Finished difference Result 7258 states and 32508 transitions. [2022-11-16 12:45:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:45:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:32,065 INFO L225 Difference]: With dead ends: 7258 [2022-11-16 12:45:32,065 INFO L226 Difference]: Without dead ends: 7258 [2022-11-16 12:45:32,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:32,070 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:32,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:45:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2022-11-16 12:45:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 7258. [2022-11-16 12:45:32,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 6855 states have (on average 4.742231947483589) internal successors, (32508), 7257 states have internal predecessors, (32508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 32508 transitions. [2022-11-16 12:45:33,107 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 32508 transitions. Word has length 2 [2022-11-16 12:45:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:33,108 INFO L495 AbstractCegarLoop]: Abstraction has 7258 states and 32508 transitions. [2022-11-16 12:45:33,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 32508 transitions. [2022-11-16 12:45:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:45:33,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:33,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:45:33,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:45:33,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:33,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash 39876, now seen corresponding path program 1 times [2022-11-16 12:45:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785024755] [2022-11-16 12:45:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:33,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:33,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:33,335 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:33,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 12:45:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:33,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:45:33,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:33,836 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:45:33,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:45:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:33,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:33,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785024755] [2022-11-16 12:45:33,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785024755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:33,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:33,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:45:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009923642] [2022-11-16 12:45:33,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:33,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:45:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:33,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:45:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:33,918 INFO L87 Difference]: Start difference. First operand 7258 states and 32508 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:34,925 INFO L93 Difference]: Finished difference Result 14513 states and 65013 transitions. [2022-11-16 12:45:34,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 12:45:34,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:35,103 INFO L225 Difference]: With dead ends: 14513 [2022-11-16 12:45:35,103 INFO L226 Difference]: Without dead ends: 14513 [2022-11-16 12:45:35,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:35,111 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:35,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 12 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:45:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14513 states. [2022-11-16 12:45:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14513 to 7260. [2022-11-16 12:45:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7260 states, 6857 states have (on average 4.741723785912207) internal successors, (32514), 7259 states have internal predecessors, (32514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7260 states to 7260 states and 32514 transitions. [2022-11-16 12:45:35,782 INFO L78 Accepts]: Start accepts. Automaton has 7260 states and 32514 transitions. Word has length 2 [2022-11-16 12:45:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:35,783 INFO L495 AbstractCegarLoop]: Abstraction has 7260 states and 32514 transitions. [2022-11-16 12:45:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 7260 states and 32514 transitions. [2022-11-16 12:45:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:45:35,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:35,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:45:35,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:35,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:35,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1243203, now seen corresponding path program 1 times [2022-11-16 12:45:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435041744] [2022-11-16 12:45:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:35,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:35,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:36,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 12:45:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:45:36,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:36,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:36,372 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-16 12:45:36,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-16 12:45:37,999 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-16 12:45:38,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:45:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:38,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:38,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:38,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435041744] [2022-11-16 12:45:38,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435041744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:38,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:38,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:45:38,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086281556] [2022-11-16 12:45:38,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:38,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:45:38,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:38,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:45:38,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:38,226 INFO L87 Difference]: Start difference. First operand 7260 states and 32514 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:38,563 INFO L93 Difference]: Finished difference Result 7261 states and 32517 transitions. [2022-11-16 12:45:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:38,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:45:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:38,621 INFO L225 Difference]: With dead ends: 7261 [2022-11-16 12:45:38,621 INFO L226 Difference]: Without dead ends: 7261 [2022-11-16 12:45:38,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:38,623 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:38,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-11-16 12:45:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2022-11-16 12:45:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 7261. [2022-11-16 12:45:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7261 states, 6858 states have (on average 4.741469816272966) internal successors, (32517), 7260 states have internal predecessors, (32517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 32517 transitions. [2022-11-16 12:45:39,016 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 32517 transitions. Word has length 3 [2022-11-16 12:45:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:39,016 INFO L495 AbstractCegarLoop]: Abstraction has 7261 states and 32517 transitions. [2022-11-16 12:45:39,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 32517 transitions. [2022-11-16 12:45:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:45:39,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:39,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:45:39,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:39,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:39,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:39,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1243204, now seen corresponding path program 1 times [2022-11-16 12:45:39,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:39,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267588472] [2022-11-16 12:45:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:39,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:39,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:39,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 12:45:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:45:39,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:39,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,658 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-16 12:45:39,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-11-16 12:45:39,813 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-16 12:45:39,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:45:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:39,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:45:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:39,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:39,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:39,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267588472] [2022-11-16 12:45:39,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267588472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:39,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:39,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:45:39,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448449523] [2022-11-16 12:45:39,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:39,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:45:39,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:45:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:39,956 INFO L87 Difference]: Start difference. First operand 7261 states and 32517 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:40,387 INFO L93 Difference]: Finished difference Result 5964 states and 26034 transitions. [2022-11-16 12:45:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:45:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:40,436 INFO L225 Difference]: With dead ends: 5964 [2022-11-16 12:45:40,436 INFO L226 Difference]: Without dead ends: 5964 [2022-11-16 12:45:40,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:40,438 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:40,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 6 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 12:45:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5964 states. [2022-11-16 12:45:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5964 to 5964. [2022-11-16 12:45:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5643 states have (on average 4.613503455608718) internal successors, (26034), 5963 states have internal predecessors, (26034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 26034 transitions. [2022-11-16 12:45:40,777 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 26034 transitions. Word has length 3 [2022-11-16 12:45:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:40,777 INFO L495 AbstractCegarLoop]: Abstraction has 5964 states and 26034 transitions. [2022-11-16 12:45:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 26034 transitions. [2022-11-16 12:45:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:45:40,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:40,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:45:40,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:40,995 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1241281, now seen corresponding path program 1 times [2022-11-16 12:45:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111867256] [2022-11-16 12:45:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:40,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:40,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:40,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:40,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 12:45:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:41,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:45:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:41,349 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:45:41,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:45:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:41,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:45:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:41,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111867256] [2022-11-16 12:45:41,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111867256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:45:41,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:45:41,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 12:45:41,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952204133] [2022-11-16 12:45:41,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:45:41,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:45:41,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:41,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:45:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:45:41,728 INFO L87 Difference]: Start difference. First operand 5964 states and 26034 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:43,782 INFO L93 Difference]: Finished difference Result 17882 states and 78087 transitions. [2022-11-16 12:45:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:45:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:45:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:43,924 INFO L225 Difference]: With dead ends: 17882 [2022-11-16 12:45:43,925 INFO L226 Difference]: Without dead ends: 17882 [2022-11-16 12:45:43,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:45:43,926 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 277 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:43,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 24 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 12:45:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17882 states. [2022-11-16 12:45:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17882 to 5970. [2022-11-16 12:45:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5970 states, 5649 states have (on average 4.611258629845991) internal successors, (26049), 5969 states have internal predecessors, (26049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5970 states to 5970 states and 26049 transitions. [2022-11-16 12:45:44,334 INFO L78 Accepts]: Start accepts. Automaton has 5970 states and 26049 transitions. Word has length 3 [2022-11-16 12:45:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:44,337 INFO L495 AbstractCegarLoop]: Abstraction has 5970 states and 26049 transitions. [2022-11-16 12:45:44,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5970 states and 26049 transitions. [2022-11-16 12:45:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:45:44,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:44,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:45:44,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:44,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:44,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:44,550 INFO L85 PathProgramCache]: Analyzing trace with hash 38538714, now seen corresponding path program 1 times [2022-11-16 12:45:44,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:44,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104948681] [2022-11-16 12:45:44,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:44,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:44,552 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:44,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 12:45:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:45:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:44,911 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-16 12:45:44,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-16 12:45:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:45,840 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-16 12:45:45,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:45:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:45:46,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:46,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104948681] [2022-11-16 12:45:46,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104948681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:46,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:46,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:45:46,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788197764] [2022-11-16 12:45:46,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:46,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:45:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:45:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:46,125 INFO L87 Difference]: Start difference. First operand 5970 states and 26049 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:46,354 INFO L93 Difference]: Finished difference Result 5974 states and 26058 transitions. [2022-11-16 12:45:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:45:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 12:45:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:46,403 INFO L225 Difference]: With dead ends: 5974 [2022-11-16 12:45:46,403 INFO L226 Difference]: Without dead ends: 5974 [2022-11-16 12:45:46,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:46,404 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:46,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-11-16 12:45:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5974 states. [2022-11-16 12:45:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5974 to 5974. [2022-11-16 12:45:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5974 states, 5653 states have (on average 4.609587829471077) internal successors, (26058), 5973 states have internal predecessors, (26058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5974 states to 5974 states and 26058 transitions. [2022-11-16 12:45:46,674 INFO L78 Accepts]: Start accepts. Automaton has 5974 states and 26058 transitions. Word has length 4 [2022-11-16 12:45:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:46,675 INFO L495 AbstractCegarLoop]: Abstraction has 5974 states and 26058 transitions. [2022-11-16 12:45:46,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5974 states and 26058 transitions. [2022-11-16 12:45:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 12:45:46,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:46,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 12:45:46,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:46,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:46,888 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash 38486758, now seen corresponding path program 1 times [2022-11-16 12:45:46,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:46,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973254590] [2022-11-16 12:45:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:46,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:46,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 12:45:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:45:47,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:47,209 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-16 12:45:47,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-16 12:45:47,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:47,639 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:45:47,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 12:45:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:45:47,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:47,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973254590] [2022-11-16 12:45:47,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973254590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:47,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:47,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:45:47,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859082222] [2022-11-16 12:45:47,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:47,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:45:47,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:45:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:47,727 INFO L87 Difference]: Start difference. First operand 5974 states and 26058 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:47,958 INFO L93 Difference]: Finished difference Result 5974 states and 26057 transitions. [2022-11-16 12:45:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:45:47,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 12:45:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:48,002 INFO L225 Difference]: With dead ends: 5974 [2022-11-16 12:45:48,002 INFO L226 Difference]: Without dead ends: 5974 [2022-11-16 12:45:48,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:48,003 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:48,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-11-16 12:45:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5974 states. [2022-11-16 12:45:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5974 to 5974. [2022-11-16 12:45:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5974 states, 5653 states have (on average 4.609410932248363) internal successors, (26057), 5973 states have internal predecessors, (26057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5974 states to 5974 states and 26057 transitions. [2022-11-16 12:45:48,269 INFO L78 Accepts]: Start accepts. Automaton has 5974 states and 26057 transitions. Word has length 4 [2022-11-16 12:45:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:48,270 INFO L495 AbstractCegarLoop]: Abstraction has 5974 states and 26057 transitions. [2022-11-16 12:45:48,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5974 states and 26057 transitions. [2022-11-16 12:45:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:45:48,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:48,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:45:48,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:48,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:48,492 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1194747652, now seen corresponding path program 1 times [2022-11-16 12:45:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:48,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990491016] [2022-11-16 12:45:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:48,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:48,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:48,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 12:45:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:48,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:45:48,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:48,800 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-16 12:45:48,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-16 12:45:49,202 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 12:45:49,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 12:45:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:49,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:49,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:49,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990491016] [2022-11-16 12:45:49,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990491016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:49,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:49,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:45:49,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171198118] [2022-11-16 12:45:49,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:49,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:45:49,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:49,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:45:49,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:49,410 INFO L87 Difference]: Start difference. First operand 5974 states and 26057 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:49,641 INFO L93 Difference]: Finished difference Result 5977 states and 26067 transitions. [2022-11-16 12:45:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:45:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:49,670 INFO L225 Difference]: With dead ends: 5977 [2022-11-16 12:45:49,670 INFO L226 Difference]: Without dead ends: 5977 [2022-11-16 12:45:49,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:49,671 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:49,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-16 12:45:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2022-11-16 12:45:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5977. [2022-11-16 12:45:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5656 states have (on average 4.608734087694484) internal successors, (26067), 5976 states have internal predecessors, (26067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 26067 transitions. [2022-11-16 12:45:49,936 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 26067 transitions. Word has length 5 [2022-11-16 12:45:49,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:49,937 INFO L495 AbstractCegarLoop]: Abstraction has 5977 states and 26067 transitions. [2022-11-16 12:45:49,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 26067 transitions. [2022-11-16 12:45:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:45:49,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:49,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:45:49,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:50,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:50,150 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:50,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1194747653, now seen corresponding path program 1 times [2022-11-16 12:45:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851872749] [2022-11-16 12:45:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:50,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:50,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:50,153 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:50,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 12:45:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:50,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:45:50,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:50,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:50,510 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-11-16 12:45:50,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2022-11-16 12:45:50,568 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 12:45:50,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 81 [2022-11-16 12:45:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:50,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:45:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:50,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:50,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:50,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851872749] [2022-11-16 12:45:50,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851872749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:50,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:50,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:45:50,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021867971] [2022-11-16 12:45:50,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:50,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:45:50,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:45:50,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:50,754 INFO L87 Difference]: Start difference. First operand 5977 states and 26067 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:51,064 INFO L93 Difference]: Finished difference Result 5755 states and 25189 transitions. [2022-11-16 12:45:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:51,065 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 [2022-11-16 12:45:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:51,092 INFO L225 Difference]: With dead ends: 5755 [2022-11-16 12:45:51,092 INFO L226 Difference]: Without dead ends: 5755 [2022-11-16 12:45:51,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:51,093 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:51,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 12:45:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2022-11-16 12:45:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5755. [2022-11-16 12:45:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 5464 states have (on average 4.609992679355783) internal successors, (25189), 5754 states have internal predecessors, (25189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 25189 transitions. [2022-11-16 12:45:51,353 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 25189 transitions. Word has length 5 [2022-11-16 12:45:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:51,354 INFO L495 AbstractCegarLoop]: Abstraction has 5755 states and 25189 transitions. [2022-11-16 12:45:51,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 25189 transitions. [2022-11-16 12:45:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:45:51,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:51,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:45:51,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:51,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:51,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:51,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:51,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1193088919, now seen corresponding path program 1 times [2022-11-16 12:45:51,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:51,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950566864] [2022-11-16 12:45:51,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:51,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:51,568 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:51,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 12:45:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:51,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:45:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:52,024 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-16 12:45:52,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-16 12:45:53,190 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-16 12:45:53,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:45:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:45:53,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:53,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:53,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950566864] [2022-11-16 12:45:53,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950566864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:53,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:53,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:45:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48354103] [2022-11-16 12:45:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:45:53,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:45:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:53,439 INFO L87 Difference]: Start difference. First operand 5755 states and 25189 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:53,628 INFO L93 Difference]: Finished difference Result 5754 states and 25185 transitions. [2022-11-16 12:45:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:53,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:45:53,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:53,649 INFO L225 Difference]: With dead ends: 5754 [2022-11-16 12:45:53,649 INFO L226 Difference]: Without dead ends: 5754 [2022-11-16 12:45:53,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:53,650 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:53,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-16 12:45:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5754 states. [2022-11-16 12:45:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5754 to 5750. [2022-11-16 12:45:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5460 states have (on average 4.610989010989011) internal successors, (25176), 5749 states have internal predecessors, (25176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25176 transitions. [2022-11-16 12:45:53,837 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25176 transitions. Word has length 5 [2022-11-16 12:45:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:53,837 INFO L495 AbstractCegarLoop]: Abstraction has 5750 states and 25176 transitions. [2022-11-16 12:45:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25176 transitions. [2022-11-16 12:45:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:45:53,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:53,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:45:53,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:54,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:54,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:54,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1617534959, now seen corresponding path program 1 times [2022-11-16 12:45:54,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:54,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722136948] [2022-11-16 12:45:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:54,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:54,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:54,052 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:54,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-16 12:45:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:54,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:45:54,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:54,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:54,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:54,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722136948] [2022-11-16 12:45:54,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722136948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:54,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:54,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:45:54,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319607478] [2022-11-16 12:45:54,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:54,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:45:54,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:54,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:45:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:54,234 INFO L87 Difference]: Start difference. First operand 5750 states and 25176 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:54,755 INFO L93 Difference]: Finished difference Result 7447 states and 31428 transitions. [2022-11-16 12:45:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:45:54,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:45:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:54,782 INFO L225 Difference]: With dead ends: 7447 [2022-11-16 12:45:54,782 INFO L226 Difference]: Without dead ends: 7447 [2022-11-16 12:45:54,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:45:54,783 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:54,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 18 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:45:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7447 states. [2022-11-16 12:45:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7447 to 7143. [2022-11-16 12:45:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 6853 states have (on average 4.4736611702903835) internal successors, (30658), 7142 states have internal predecessors, (30658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 30658 transitions. [2022-11-16 12:45:55,007 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 30658 transitions. Word has length 6 [2022-11-16 12:45:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:55,008 INFO L495 AbstractCegarLoop]: Abstraction has 7143 states and 30658 transitions. [2022-11-16 12:45:55,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 30658 transitions. [2022-11-16 12:45:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:45:55,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:55,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:45:55,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:55,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:55,211 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:55,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1618971941, now seen corresponding path program 1 times [2022-11-16 12:45:55,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:55,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530557184] [2022-11-16 12:45:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:55,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:55,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:55,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:55,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-16 12:45:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:45:55,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:55,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:55,546 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-16 12:45:55,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-16 12:45:55,893 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 12:45:55,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 12:45:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:45:56,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:56,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:56,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530557184] [2022-11-16 12:45:56,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530557184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:56,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:56,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:45:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027185437] [2022-11-16 12:45:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:56,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:45:56,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:45:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:56,053 INFO L87 Difference]: Start difference. First operand 7143 states and 30658 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:56,268 INFO L93 Difference]: Finished difference Result 7141 states and 30654 transitions. [2022-11-16 12:45:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:56,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:45:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:56,305 INFO L225 Difference]: With dead ends: 7141 [2022-11-16 12:45:56,305 INFO L226 Difference]: Without dead ends: 7141 [2022-11-16 12:45:56,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:56,306 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:56,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-16 12:45:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2022-11-16 12:45:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 7138. [2022-11-16 12:45:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7138 states, 6848 states have (on average 4.475613317757009) internal successors, (30649), 7137 states have internal predecessors, (30649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7138 states to 7138 states and 30649 transitions. [2022-11-16 12:45:56,492 INFO L78 Accepts]: Start accepts. Automaton has 7138 states and 30649 transitions. Word has length 6 [2022-11-16 12:45:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:56,492 INFO L495 AbstractCegarLoop]: Abstraction has 7138 states and 30649 transitions. [2022-11-16 12:45:56,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7138 states and 30649 transitions. [2022-11-16 12:45:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:45:56,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:56,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:45:56,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:56,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:56,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1668901657, now seen corresponding path program 1 times [2022-11-16 12:45:56,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:56,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853623670] [2022-11-16 12:45:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:56,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:56,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:56,698 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:56,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 12:45:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:56,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:45:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:56,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:57,046 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-16 12:45:57,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-16 12:45:58,064 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-16 12:45:58,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:45:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:45:58,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:45:58,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:45:58,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853623670] [2022-11-16 12:45:58,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853623670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:45:58,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:45:58,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:45:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625244889] [2022-11-16 12:45:58,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:45:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:45:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:45:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:45:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:58,704 INFO L87 Difference]: Start difference. First operand 7138 states and 30649 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:45:58,883 INFO L93 Difference]: Finished difference Result 7144 states and 30662 transitions. [2022-11-16 12:45:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:45:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:45:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:45:58,911 INFO L225 Difference]: With dead ends: 7144 [2022-11-16 12:45:58,911 INFO L226 Difference]: Without dead ends: 7144 [2022-11-16 12:45:58,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:45:58,912 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:45:58,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-16 12:45:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2022-11-16 12:45:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 7141. [2022-11-16 12:45:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7141 states, 6851 states have (on average 4.474821193986279) internal successors, (30657), 7140 states have internal predecessors, (30657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7141 states to 7141 states and 30657 transitions. [2022-11-16 12:45:59,115 INFO L78 Accepts]: Start accepts. Automaton has 7141 states and 30657 transitions. Word has length 6 [2022-11-16 12:45:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:45:59,115 INFO L495 AbstractCegarLoop]: Abstraction has 7141 states and 30657 transitions. [2022-11-16 12:45:59,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:45:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7141 states and 30657 transitions. [2022-11-16 12:45:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:45:59,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:45:59,117 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 12:45:59,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:45:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:59,318 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:45:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:45:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1670614268, now seen corresponding path program 2 times [2022-11-16 12:45:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:45:59,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519391037] [2022-11-16 12:45:59,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:45:59,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:45:59,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:45:59,321 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:45:59,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 12:45:59,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:45:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:45:59,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:45:59,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:59,659 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:45:59,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:45:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:59,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:00,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519391037] [2022-11-16 12:46:00,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519391037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:00,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:00,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:46:00,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342697902] [2022-11-16 12:46:00,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:00,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:46:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:00,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:46:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:46:00,754 INFO L87 Difference]: Start difference. First operand 7141 states and 30657 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:04,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:05,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:07,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:08,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:11,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:13,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:15,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:21,590 INFO L93 Difference]: Finished difference Result 71238 states and 306227 transitions. [2022-11-16 12:46:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:46:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:46:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:22,034 INFO L225 Difference]: With dead ends: 71238 [2022-11-16 12:46:22,035 INFO L226 Difference]: Without dead ends: 71238 [2022-11-16 12:46:22,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:46:22,035 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1092 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 55 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:22,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 186 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1549 Invalid, 2 Unknown, 0 Unchecked, 18.2s Time] [2022-11-16 12:46:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71238 states. [2022-11-16 12:46:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71238 to 7159. [2022-11-16 12:46:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7159 states, 6869 states have (on average 4.468918328723249) internal successors, (30697), 7158 states have internal predecessors, (30697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7159 states to 7159 states and 30697 transitions. [2022-11-16 12:46:22,992 INFO L78 Accepts]: Start accepts. Automaton has 7159 states and 30697 transitions. Word has length 6 [2022-11-16 12:46:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:22,993 INFO L495 AbstractCegarLoop]: Abstraction has 7159 states and 30697 transitions. [2022-11-16 12:46:22,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7159 states and 30697 transitions. [2022-11-16 12:46:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:46:22,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:22,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:23,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:23,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:23,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:23,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:23,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1396255014, now seen corresponding path program 1 times [2022-11-16 12:46:23,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:23,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245122159] [2022-11-16 12:46:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:23,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:23,197 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:23,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 12:46:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:46:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:23,488 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:46:23,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:46:24,105 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:46:24,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:46:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:24,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:24,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:24,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245122159] [2022-11-16 12:46:24,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245122159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:24,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:24,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:46:24,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245784579] [2022-11-16 12:46:24,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:46:24,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:46:24,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:24,372 INFO L87 Difference]: Start difference. First operand 7159 states and 30697 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:24,727 INFO L93 Difference]: Finished difference Result 7168 states and 30728 transitions. [2022-11-16 12:46:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:46:24,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:46:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:24,762 INFO L225 Difference]: With dead ends: 7168 [2022-11-16 12:46:24,763 INFO L226 Difference]: Without dead ends: 7168 [2022-11-16 12:46:24,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:24,766 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:24,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-16 12:46:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2022-11-16 12:46:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 7168. [2022-11-16 12:46:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7168 states, 6878 states have (on average 4.467577784239604) internal successors, (30728), 7167 states have internal predecessors, (30728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7168 states to 7168 states and 30728 transitions. [2022-11-16 12:46:24,975 INFO L78 Accepts]: Start accepts. Automaton has 7168 states and 30728 transitions. Word has length 7 [2022-11-16 12:46:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:24,976 INFO L495 AbstractCegarLoop]: Abstraction has 7168 states and 30728 transitions. [2022-11-16 12:46:24,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7168 states and 30728 transitions. [2022-11-16 12:46:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:46:24,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:24,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:24,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:25,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:25,193 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1396255015, now seen corresponding path program 1 times [2022-11-16 12:46:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84229246] [2022-11-16 12:46:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:25,194 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 [2022-11-16 12:46:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:25,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:25,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 12:46:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:46:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:25,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:25,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:25,585 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 12:46:25,586 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 18 treesize of output 53 [2022-11-16 12:46:25,607 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 130 treesize of output 126 [2022-11-16 12:46:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:25,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:46:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:25,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:25,758 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84229246] [2022-11-16 12:46:25,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84229246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:25,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:25,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:46:25,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153057703] [2022-11-16 12:46:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:25,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:46:25,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:46:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:46:25,759 INFO L87 Difference]: Start difference. First operand 7168 states and 30728 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:26,032 INFO L93 Difference]: Finished difference Result 7072 states and 30430 transitions. [2022-11-16 12:46:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:46:26,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:46:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:26,057 INFO L225 Difference]: With dead ends: 7072 [2022-11-16 12:46:26,057 INFO L226 Difference]: Without dead ends: 7072 [2022-11-16 12:46:26,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:46:26,058 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:26,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-11-16 12:46:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2022-11-16 12:46:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 7072. [2022-11-16 12:46:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 6800 states have (on average 4.475) internal successors, (30430), 7071 states have internal predecessors, (30430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 30430 transitions. [2022-11-16 12:46:26,225 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 30430 transitions. Word has length 7 [2022-11-16 12:46:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:26,226 INFO L495 AbstractCegarLoop]: Abstraction has 7072 states and 30430 transitions. [2022-11-16 12:46:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 30430 transitions. [2022-11-16 12:46:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:46:26,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:26,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:26,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:26,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:26,431 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1396030235, now seen corresponding path program 1 times [2022-11-16 12:46:26,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:26,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797121061] [2022-11-16 12:46:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:26,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:26,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:26,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:26,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 12:46:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:26,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:46:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:26,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:26,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797121061] [2022-11-16 12:46:26,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797121061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:26,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:26,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:46:26,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563625468] [2022-11-16 12:46:26,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:26,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:46:26,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:26,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:46:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:46:26,622 INFO L87 Difference]: Start difference. First operand 7072 states and 30430 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:27,207 INFO L93 Difference]: Finished difference Result 9794 states and 42708 transitions. [2022-11-16 12:46:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:46:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:46:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:27,259 INFO L225 Difference]: With dead ends: 9794 [2022-11-16 12:46:27,259 INFO L226 Difference]: Without dead ends: 9788 [2022-11-16 12:46:27,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:46:27,260 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 107 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:27,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 12 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:46:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9788 states. [2022-11-16 12:46:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9788 to 7349. [2022-11-16 12:46:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7051 states have (on average 4.72684725570841) internal successors, (33329), 7348 states have internal predecessors, (33329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 33329 transitions. [2022-11-16 12:46:27,505 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 33329 transitions. Word has length 7 [2022-11-16 12:46:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:27,505 INFO L495 AbstractCegarLoop]: Abstraction has 7349 states and 33329 transitions. [2022-11-16 12:46:27,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 33329 transitions. [2022-11-16 12:46:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:46:27,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:27,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:27,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:27,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:27,707 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash -196350322, now seen corresponding path program 1 times [2022-11-16 12:46:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:27,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565600015] [2022-11-16 12:46:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:27,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:27,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:27,709 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:27,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 12:46:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:46:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:28,046 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:46:28,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:46:28,089 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:46:28,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:46:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:46:28,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:28,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565600015] [2022-11-16 12:46:28,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565600015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:28,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:28,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:46:28,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231801697] [2022-11-16 12:46:28,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:28,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:46:28,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:46:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:46:28,115 INFO L87 Difference]: Start difference. First operand 7349 states and 33329 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:28,367 INFO L93 Difference]: Finished difference Result 5618 states and 24637 transitions. [2022-11-16 12:46:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:46:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:46:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:28,395 INFO L225 Difference]: With dead ends: 5618 [2022-11-16 12:46:28,395 INFO L226 Difference]: Without dead ends: 5618 [2022-11-16 12:46:28,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:46:28,396 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:28,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 6 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:46:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2022-11-16 12:46:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 5618. [2022-11-16 12:46:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5456 states have (on average 4.5155791788856305) internal successors, (24637), 5617 states have internal predecessors, (24637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 24637 transitions. [2022-11-16 12:46:28,548 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 24637 transitions. Word has length 7 [2022-11-16 12:46:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:28,548 INFO L495 AbstractCegarLoop]: Abstraction has 5618 states and 24637 transitions. [2022-11-16 12:46:28,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 24637 transitions. [2022-11-16 12:46:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:46:28,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:28,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:28,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:28,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:28,761 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash -196350321, now seen corresponding path program 1 times [2022-11-16 12:46:28,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:28,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278661956] [2022-11-16 12:46:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:28,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:28,763 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:28,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 12:46:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:46:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:29,207 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:46:29,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:46:29,476 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:46:29,476 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:46:29,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:29,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:46:29,658 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:46:29,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:46:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:29,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:34,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:34,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278661956] [2022-11-16 12:46:34,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278661956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:34,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:34,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:46:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859577901] [2022-11-16 12:46:34,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:34,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:46:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:46:34,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:46:34,122 INFO L87 Difference]: Start difference. First operand 5618 states and 24637 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:34,438 INFO L93 Difference]: Finished difference Result 5632 states and 24663 transitions. [2022-11-16 12:46:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:46:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:46:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:34,464 INFO L225 Difference]: With dead ends: 5632 [2022-11-16 12:46:34,464 INFO L226 Difference]: Without dead ends: 5632 [2022-11-16 12:46:34,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:46:34,465 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:34,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-11-16 12:46:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2022-11-16 12:46:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 5630. [2022-11-16 12:46:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5630 states, 5468 states have (on average 4.510058522311631) internal successors, (24661), 5629 states have internal predecessors, (24661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5630 states to 5630 states and 24661 transitions. [2022-11-16 12:46:34,630 INFO L78 Accepts]: Start accepts. Automaton has 5630 states and 24661 transitions. Word has length 7 [2022-11-16 12:46:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:34,631 INFO L495 AbstractCegarLoop]: Abstraction has 5630 states and 24661 transitions. [2022-11-16 12:46:34,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5630 states and 24661 transitions. [2022-11-16 12:46:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:46:34,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:34,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:34,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:34,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:34,843 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash -197787304, now seen corresponding path program 1 times [2022-11-16 12:46:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:34,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75550688] [2022-11-16 12:46:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:34,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:34,845 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:34,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 12:46:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:46:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:35,201 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-16 12:46:35,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-16 12:46:36,274 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-16 12:46:36,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:46:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:46:36,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:36,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75550688] [2022-11-16 12:46:36,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75550688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:36,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:36,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:46:36,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147204930] [2022-11-16 12:46:36,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:36,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:46:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:46:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:36,832 INFO L87 Difference]: Start difference. First operand 5630 states and 24661 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:37,027 INFO L93 Difference]: Finished difference Result 5628 states and 24656 transitions. [2022-11-16 12:46:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:46:37,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:46:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:37,060 INFO L225 Difference]: With dead ends: 5628 [2022-11-16 12:46:37,060 INFO L226 Difference]: Without dead ends: 5628 [2022-11-16 12:46:37,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:37,063 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:37,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-16 12:46:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2022-11-16 12:46:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 5625. [2022-11-16 12:46:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5625 states, 5463 states have (on average 4.512172798828482) internal successors, (24650), 5624 states have internal predecessors, (24650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5625 states to 5625 states and 24650 transitions. [2022-11-16 12:46:37,295 INFO L78 Accepts]: Start accepts. Automaton has 5625 states and 24650 transitions. Word has length 7 [2022-11-16 12:46:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:37,295 INFO L495 AbstractCegarLoop]: Abstraction has 5625 states and 24650 transitions. [2022-11-16 12:46:37,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5625 states and 24650 transitions. [2022-11-16 12:46:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:46:37,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:37,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:37,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:37,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:37,499 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash 334225488, now seen corresponding path program 1 times [2022-11-16 12:46:37,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:37,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320259938] [2022-11-16 12:46:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:37,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:37,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:37,501 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:37,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-16 12:46:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:37,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:46:37,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:37,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 12:46:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:37,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:37,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:37,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320259938] [2022-11-16 12:46:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320259938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:37,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:37,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:46:37,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405822978] [2022-11-16 12:46:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:46:37,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:46:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:46:37,673 INFO L87 Difference]: Start difference. First operand 5625 states and 24650 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:37,938 INFO L93 Difference]: Finished difference Result 4085 states and 17743 transitions. [2022-11-16 12:46:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:46:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:46:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:37,955 INFO L225 Difference]: With dead ends: 4085 [2022-11-16 12:46:37,955 INFO L226 Difference]: Without dead ends: 4085 [2022-11-16 12:46:37,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:46:37,956 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:37,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:46:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2022-11-16 12:46:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 4085. [2022-11-16 12:46:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4085 states, 4000 states have (on average 4.43575) internal successors, (17743), 4084 states have internal predecessors, (17743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4085 states to 4085 states and 17743 transitions. [2022-11-16 12:46:38,072 INFO L78 Accepts]: Start accepts. Automaton has 4085 states and 17743 transitions. Word has length 8 [2022-11-16 12:46:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:38,073 INFO L495 AbstractCegarLoop]: Abstraction has 4085 states and 17743 transitions. [2022-11-16 12:46:38,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4085 states and 17743 transitions. [2022-11-16 12:46:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:46:38,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:38,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:38,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:38,279 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:38,279 INFO L85 PathProgramCache]: Analyzing trace with hash 334225489, now seen corresponding path program 1 times [2022-11-16 12:46:38,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:38,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647000702] [2022-11-16 12:46:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:38,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:38,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:38,281 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:38,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 12:46:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:38,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:46:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:38,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:38,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:38,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647000702] [2022-11-16 12:46:38,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647000702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:38,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:38,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:46:38,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826781928] [2022-11-16 12:46:38,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:38,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:46:38,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:38,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:46:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:46:38,494 INFO L87 Difference]: Start difference. First operand 4085 states and 17743 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:38,999 INFO L93 Difference]: Finished difference Result 5758 states and 23985 transitions. [2022-11-16 12:46:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:46:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:46:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:39,023 INFO L225 Difference]: With dead ends: 5758 [2022-11-16 12:46:39,023 INFO L226 Difference]: Without dead ends: 5710 [2022-11-16 12:46:39,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:46:39,024 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:39,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 18 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:46:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5710 states. [2022-11-16 12:46:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5710 to 5488. [2022-11-16 12:46:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5403 states have (on average 4.3168610031464) internal successors, (23324), 5487 states have internal predecessors, (23324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 23324 transitions. [2022-11-16 12:46:39,179 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 23324 transitions. Word has length 8 [2022-11-16 12:46:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:39,180 INFO L495 AbstractCegarLoop]: Abstraction has 5488 states and 23324 transitions. [2022-11-16 12:46:39,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 23324 transitions. [2022-11-16 12:46:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:46:39,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:39,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:39,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:39,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:39,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1053844675, now seen corresponding path program 1 times [2022-11-16 12:46:39,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:39,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066164392] [2022-11-16 12:46:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:39,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:39,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:39,383 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:39,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 12:46:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:46:39,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:39,745 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:46:39,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:46:40,468 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:46:40,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:46:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:46:40,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:40,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066164392] [2022-11-16 12:46:40,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066164392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:40,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:40,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:46:40,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799962835] [2022-11-16 12:46:40,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:40,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:46:40,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:46:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:40,813 INFO L87 Difference]: Start difference. First operand 5488 states and 23324 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) [2022-11-16 12:46:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:40,985 INFO L93 Difference]: Finished difference Result 5488 states and 23328 transitions. [2022-11-16 12:46:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:46:40,985 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 [2022-11-16 12:46:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:41,003 INFO L225 Difference]: With dead ends: 5488 [2022-11-16 12:46:41,003 INFO L226 Difference]: Without dead ends: 5488 [2022-11-16 12:46:41,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:41,004 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:41,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 12:46:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5488 states. [2022-11-16 12:46:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5488 to 5488. [2022-11-16 12:46:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5403 states have (on average 4.317601332593004) internal successors, (23328), 5487 states have internal predecessors, (23328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 23328 transitions. [2022-11-16 12:46:41,113 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 23328 transitions. Word has length 8 [2022-11-16 12:46:41,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:41,113 INFO L495 AbstractCegarLoop]: Abstraction has 5488 states and 23328 transitions. [2022-11-16 12:46:41,113 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) [2022-11-16 12:46:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 23328 transitions. [2022-11-16 12:46:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:46:41,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:41,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:41,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:41,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:41,314 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:41,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1791661495, now seen corresponding path program 1 times [2022-11-16 12:46:41,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:41,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197118531] [2022-11-16 12:46:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:41,316 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:41,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 12:46:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:46:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:41,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:41,665 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:46:41,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:46:42,351 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:46:42,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:46:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:46:42,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:42,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:42,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197118531] [2022-11-16 12:46:42,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197118531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:42,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:42,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:46:42,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614420043] [2022-11-16 12:46:42,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:46:42,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:42,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:46:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:42,602 INFO L87 Difference]: Start difference. First operand 5488 states and 23328 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) [2022-11-16 12:46:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:42,755 INFO L93 Difference]: Finished difference Result 5484 states and 23314 transitions. [2022-11-16 12:46:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:46:42,755 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 [2022-11-16 12:46:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:42,773 INFO L225 Difference]: With dead ends: 5484 [2022-11-16 12:46:42,773 INFO L226 Difference]: Without dead ends: 5484 [2022-11-16 12:46:42,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:42,774 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:42,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 12:46:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2022-11-16 12:46:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 5484. [2022-11-16 12:46:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5399 states have (on average 4.31820707538433) internal successors, (23314), 5483 states have internal predecessors, (23314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:42,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 23314 transitions. [2022-11-16 12:46:42,879 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 23314 transitions. Word has length 8 [2022-11-16 12:46:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:42,880 INFO L495 AbstractCegarLoop]: Abstraction has 5484 states and 23314 transitions. [2022-11-16 12:46:42,880 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) [2022-11-16 12:46:42,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 23314 transitions. [2022-11-16 12:46:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:46:42,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:42,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:42,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:46:43,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:43,093 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:43,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1791663034, now seen corresponding path program 1 times [2022-11-16 12:46:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:43,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656874264] [2022-11-16 12:46:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:43,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:43,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:43,095 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:43,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 12:46:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:46:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:43,617 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:46:43,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:46:43,884 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:46:43,884 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:46:44,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:44,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:46:44,058 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:46:44,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:46:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:44,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:47,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:47,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656874264] [2022-11-16 12:46:47,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656874264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:47,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:47,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:46:47,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074831630] [2022-11-16 12:46:47,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:47,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:46:47,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:47,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:46:47,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:46:47,444 INFO L87 Difference]: Start difference. First operand 5484 states and 23314 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:47,749 INFO L93 Difference]: Finished difference Result 5502 states and 23348 transitions. [2022-11-16 12:46:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:46:47,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:46:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:47,767 INFO L225 Difference]: With dead ends: 5502 [2022-11-16 12:46:47,767 INFO L226 Difference]: Without dead ends: 5502 [2022-11-16 12:46:47,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:46:47,768 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:47,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-11-16 12:46:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2022-11-16 12:46:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5484. [2022-11-16 12:46:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5399 states have (on average 4.31857751435451) internal successors, (23316), 5483 states have internal predecessors, (23316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 23316 transitions. [2022-11-16 12:46:47,875 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 23316 transitions. Word has length 8 [2022-11-16 12:46:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:47,875 INFO L495 AbstractCegarLoop]: Abstraction has 5484 states and 23316 transitions. [2022-11-16 12:46:47,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 23316 transitions. [2022-11-16 12:46:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:46:47,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:47,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:47,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:46:48,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:48,083 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:48,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1791891482, now seen corresponding path program 1 times [2022-11-16 12:46:48,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:48,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963057936] [2022-11-16 12:46:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:48,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:48,084 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:48,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 12:46:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:46:48,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:48,463 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-16 12:46:48,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-16 12:46:48,733 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-16 12:46:48,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-16 12:46:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:46:49,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:49,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:49,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963057936] [2022-11-16 12:46:49,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963057936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:49,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:49,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:46:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052500554] [2022-11-16 12:46:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:49,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:46:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:49,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:46:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:46:49,023 INFO L87 Difference]: Start difference. First operand 5484 states and 23316 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:49,213 INFO L93 Difference]: Finished difference Result 5486 states and 23320 transitions. [2022-11-16 12:46:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:46:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:46:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:49,241 INFO L225 Difference]: With dead ends: 5486 [2022-11-16 12:46:49,241 INFO L226 Difference]: Without dead ends: 5486 [2022-11-16 12:46:49,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:46:49,242 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:49,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-16 12:46:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2022-11-16 12:46:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5486. [2022-11-16 12:46:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5401 states have (on average 4.317718940936864) internal successors, (23320), 5485 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 23320 transitions. [2022-11-16 12:46:49,384 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 23320 transitions. Word has length 8 [2022-11-16 12:46:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:49,385 INFO L495 AbstractCegarLoop]: Abstraction has 5486 states and 23320 transitions. [2022-11-16 12:46:49,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 23320 transitions. [2022-11-16 12:46:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:46:49,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:49,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:49,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:49,598 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1836445634, now seen corresponding path program 1 times [2022-11-16 12:46:49,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:49,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545152694] [2022-11-16 12:46:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:49,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:49,600 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:49,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 12:46:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:46:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:50,081 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:46:50,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:46:50,354 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:46:50,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:46:50,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:50,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:46:50,550 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:46:50,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:46:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:46:50,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:46:55,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545152694] [2022-11-16 12:46:55,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545152694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:55,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:46:55,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:46:55,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846606161] [2022-11-16 12:46:55,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:55,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:46:55,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:55,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:46:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:46:55,912 INFO L87 Difference]: Start difference. First operand 5486 states and 23320 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:56,224 INFO L93 Difference]: Finished difference Result 5528 states and 23409 transitions. [2022-11-16 12:46:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:46:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 12:46:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:56,242 INFO L225 Difference]: With dead ends: 5528 [2022-11-16 12:46:56,242 INFO L226 Difference]: Without dead ends: 5528 [2022-11-16 12:46:56,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:46:56,243 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:56,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-11-16 12:46:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5528 states. [2022-11-16 12:46:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5528 to 5515. [2022-11-16 12:46:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5515 states, 5430 states have (on average 4.306629834254144) internal successors, (23385), 5514 states have internal predecessors, (23385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5515 states to 5515 states and 23385 transitions. [2022-11-16 12:46:56,349 INFO L78 Accepts]: Start accepts. Automaton has 5515 states and 23385 transitions. Word has length 8 [2022-11-16 12:46:56,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:56,349 INFO L495 AbstractCegarLoop]: Abstraction has 5515 states and 23385 transitions. [2022-11-16 12:46:56,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states and 23385 transitions. [2022-11-16 12:46:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:46:56,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:56,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:56,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:56,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:56,563 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:56,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1771059466, now seen corresponding path program 1 times [2022-11-16 12:46:56,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:56,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403806988] [2022-11-16 12:46:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:56,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:56,565 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:56,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 12:46:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:46:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:56,879 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:46:56,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:46:56,958 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:46:56,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:46:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:57,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:57,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:57,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403806988] [2022-11-16 12:46:57,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403806988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:57,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:57,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:46:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918509355] [2022-11-16 12:46:57,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:57,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:46:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:46:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:57,034 INFO L87 Difference]: Start difference. First operand 5515 states and 23385 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:57,214 INFO L93 Difference]: Finished difference Result 5515 states and 23383 transitions. [2022-11-16 12:46:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:46:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:46:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:57,231 INFO L225 Difference]: With dead ends: 5515 [2022-11-16 12:46:57,231 INFO L226 Difference]: Without dead ends: 5515 [2022-11-16 12:46:57,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:57,232 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:57,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 12:46:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2022-11-16 12:46:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 5515. [2022-11-16 12:46:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5515 states, 5430 states have (on average 4.3062615101289135) internal successors, (23383), 5514 states have internal predecessors, (23383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5515 states to 5515 states and 23383 transitions. [2022-11-16 12:46:57,341 INFO L78 Accepts]: Start accepts. Automaton has 5515 states and 23383 transitions. Word has length 9 [2022-11-16 12:46:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:57,341 INFO L495 AbstractCegarLoop]: Abstraction has 5515 states and 23383 transitions. [2022-11-16 12:46:57,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states and 23383 transitions. [2022-11-16 12:46:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:46:57,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:57,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:57,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:57,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:57,542 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:57,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1771301764, now seen corresponding path program 1 times [2022-11-16 12:46:57,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:57,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299068276] [2022-11-16 12:46:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:57,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:57,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:57,544 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:57,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 12:46:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:46:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:57,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:57,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:57,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:57,924 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:46:57,924 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:46:57,936 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 22 treesize of output 20 [2022-11-16 12:46:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:57,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:46:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:58,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:58,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299068276] [2022-11-16 12:46:58,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299068276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:58,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:58,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:46:58,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235662834] [2022-11-16 12:46:58,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:58,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:46:58,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:46:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:46:58,116 INFO L87 Difference]: Start difference. First operand 5515 states and 23383 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:58,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:58,353 INFO L93 Difference]: Finished difference Result 5507 states and 23367 transitions. [2022-11-16 12:46:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:46:58,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:46:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:58,371 INFO L225 Difference]: With dead ends: 5507 [2022-11-16 12:46:58,371 INFO L226 Difference]: Without dead ends: 5507 [2022-11-16 12:46:58,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:46:58,372 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:58,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-16 12:46:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2022-11-16 12:46:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 5507. [2022-11-16 12:46:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5422 states have (on average 4.309664330505348) internal successors, (23367), 5506 states have internal predecessors, (23367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 23367 transitions. [2022-11-16 12:46:58,478 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 23367 transitions. Word has length 9 [2022-11-16 12:46:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:58,478 INFO L495 AbstractCegarLoop]: Abstraction has 5507 states and 23367 transitions. [2022-11-16 12:46:58,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 23367 transitions. [2022-11-16 12:46:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:46:58,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:58,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:58,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:58,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:58,679 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:58,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1771301765, now seen corresponding path program 1 times [2022-11-16 12:46:58,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:58,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349321531] [2022-11-16 12:46:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:58,682 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:58,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-16 12:46:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:58,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:46:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:58,968 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-16 12:46:58,969 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 40 treesize of output 55 [2022-11-16 12:46:59,008 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:46:59,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:46:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:59,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:46:59,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:46:59,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349321531] [2022-11-16 12:46:59,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349321531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:46:59,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:46:59,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:46:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241513210] [2022-11-16 12:46:59,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:46:59,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:46:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:46:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:46:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:59,044 INFO L87 Difference]: Start difference. First operand 5507 states and 23367 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:46:59,286 INFO L93 Difference]: Finished difference Result 5248 states and 22305 transitions. [2022-11-16 12:46:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:46:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:46:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:46:59,304 INFO L225 Difference]: With dead ends: 5248 [2022-11-16 12:46:59,304 INFO L226 Difference]: Without dead ends: 5248 [2022-11-16 12:46:59,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:46:59,305 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:46:59,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:46:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2022-11-16 12:46:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 5248. [2022-11-16 12:46:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5248 states, 5175 states have (on average 4.310144927536232) internal successors, (22305), 5247 states have internal predecessors, (22305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5248 states to 5248 states and 22305 transitions. [2022-11-16 12:46:59,440 INFO L78 Accepts]: Start accepts. Automaton has 5248 states and 22305 transitions. Word has length 9 [2022-11-16 12:46:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:46:59,440 INFO L495 AbstractCegarLoop]: Abstraction has 5248 states and 22305 transitions. [2022-11-16 12:46:59,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:46:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5248 states and 22305 transitions. [2022-11-16 12:46:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:46:59,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:46:59,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:46:59,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:46:59,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:59,642 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:46:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:46:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1690546458, now seen corresponding path program 1 times [2022-11-16 12:46:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:46:59,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919062395] [2022-11-16 12:46:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:46:59,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:46:59,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:46:59,643 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:46:59,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 12:46:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:46:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:46:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:46:59,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:47:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:00,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:01,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919062395] [2022-11-16 12:47:01,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919062395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:01,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:01,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 12:47:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093534155] [2022-11-16 12:47:01,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:47:01,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:47:01,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:01,422 INFO L87 Difference]: Start difference. First operand 5248 states and 22305 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:02,977 INFO L93 Difference]: Finished difference Result 5328 states and 22525 transitions. [2022-11-16 12:47:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:47:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:47:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:02,994 INFO L225 Difference]: With dead ends: 5328 [2022-11-16 12:47:02,994 INFO L226 Difference]: Without dead ends: 5328 [2022-11-16 12:47:02,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:47:02,995 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:02,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-11-16 12:47:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2022-11-16 12:47:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 5288. [2022-11-16 12:47:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5215 states have (on average 4.298178331735379) internal successors, (22415), 5287 states have internal predecessors, (22415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 22415 transitions. [2022-11-16 12:47:03,097 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 22415 transitions. Word has length 9 [2022-11-16 12:47:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:03,098 INFO L495 AbstractCegarLoop]: Abstraction has 5288 states and 22415 transitions. [2022-11-16 12:47:03,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 22415 transitions. [2022-11-16 12:47:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:47:03,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:03,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:03,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:03,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:03,303 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 293061098, now seen corresponding path program 1 times [2022-11-16 12:47:03,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:03,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537371574] [2022-11-16 12:47:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:03,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:03,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:03,305 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:03,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 12:47:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:47:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:03,778 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:47:03,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:47:04,063 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:47:04,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:47:04,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:04,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:47:04,237 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:47:04,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:47:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:04,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:06,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:06,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537371574] [2022-11-16 12:47:06,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537371574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:06,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:06,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:47:06,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245382438] [2022-11-16 12:47:06,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:47:06,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:47:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:06,240 INFO L87 Difference]: Start difference. First operand 5288 states and 22415 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:06,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:06,649 INFO L93 Difference]: Finished difference Result 5317 states and 22492 transitions. [2022-11-16 12:47:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:47:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:47:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:06,666 INFO L225 Difference]: With dead ends: 5317 [2022-11-16 12:47:06,666 INFO L226 Difference]: Without dead ends: 5317 [2022-11-16 12:47:06,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:06,667 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:06,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2022-11-16 12:47:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5317 states. [2022-11-16 12:47:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5317 to 5310. [2022-11-16 12:47:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5237 states have (on average 4.2925338934504484) internal successors, (22480), 5309 states have internal predecessors, (22480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 22480 transitions. [2022-11-16 12:47:06,768 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 22480 transitions. Word has length 9 [2022-11-16 12:47:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:06,768 INFO L495 AbstractCegarLoop]: Abstraction has 5310 states and 22480 transitions. [2022-11-16 12:47:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 22480 transitions. [2022-11-16 12:47:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:47:06,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:06,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:06,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:06,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:06,970 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 285936731, now seen corresponding path program 1 times [2022-11-16 12:47:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309373429] [2022-11-16 12:47:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:06,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:06,971 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:06,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 12:47:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:47:07,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:07,350 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-16 12:47:07,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-16 12:47:07,908 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-16 12:47:07,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-16 12:47:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:47:08,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:08,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:08,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309373429] [2022-11-16 12:47:08,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309373429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:08,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:08,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:47:08,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469721026] [2022-11-16 12:47:08,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:08,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:47:08,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:08,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:47:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:47:08,417 INFO L87 Difference]: Start difference. First operand 5310 states and 22480 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:08,613 INFO L93 Difference]: Finished difference Result 5311 states and 22475 transitions. [2022-11-16 12:47:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:47:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:47:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:08,638 INFO L225 Difference]: With dead ends: 5311 [2022-11-16 12:47:08,638 INFO L226 Difference]: Without dead ends: 5311 [2022-11-16 12:47:08,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:47:08,639 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:08,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-11-16 12:47:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2022-11-16 12:47:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 5308. [2022-11-16 12:47:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5308 states, 5235 states have (on average 4.29207258834766) internal successors, (22469), 5307 states have internal predecessors, (22469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 22469 transitions. [2022-11-16 12:47:08,774 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 22469 transitions. Word has length 9 [2022-11-16 12:47:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:08,775 INFO L495 AbstractCegarLoop]: Abstraction has 5308 states and 22469 transitions. [2022-11-16 12:47:08,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 22469 transitions. [2022-11-16 12:47:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:47:08,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:08,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:08,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:08,976 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1095008646, now seen corresponding path program 1 times [2022-11-16 12:47:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:08,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763362482] [2022-11-16 12:47:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:08,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:08,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:08,979 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:09,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-16 12:47:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:09,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:47:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:09,386 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:47:09,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:47:10,079 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:47:10,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:47:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:47:10,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:10,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:10,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763362482] [2022-11-16 12:47:10,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763362482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:10,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:10,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:10,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427807032] [2022-11-16 12:47:10,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:10,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:10,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:10,401 INFO L87 Difference]: Start difference. First operand 5308 states and 22469 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:10,570 INFO L93 Difference]: Finished difference Result 5308 states and 22475 transitions. [2022-11-16 12:47:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:47:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:10,594 INFO L225 Difference]: With dead ends: 5308 [2022-11-16 12:47:10,595 INFO L226 Difference]: Without dead ends: 5308 [2022-11-16 12:47:10,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:10,595 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:10,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-16 12:47:10,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5308 states. [2022-11-16 12:47:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5308 to 5308. [2022-11-16 12:47:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5308 states, 5235 states have (on average 4.293218720152818) internal successors, (22475), 5307 states have internal predecessors, (22475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 22475 transitions. [2022-11-16 12:47:10,840 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 22475 transitions. Word has length 9 [2022-11-16 12:47:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:10,840 INFO L495 AbstractCegarLoop]: Abstraction has 5308 states and 22475 transitions. [2022-11-16 12:47:10,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 22475 transitions. [2022-11-16 12:47:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:47:10,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:10,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:10,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:11,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:11,047 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:11,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1095010185, now seen corresponding path program 1 times [2022-11-16 12:47:11,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275499721] [2022-11-16 12:47:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:11,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:11,050 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:11,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 12:47:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:11,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:47:11,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:11,573 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:47:11,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:47:11,857 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:47:11,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:47:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:12,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:47:12,040 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:47:12,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:47:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:47:12,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:47:14,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:14,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275499721] [2022-11-16 12:47:14,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275499721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:14,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:14,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 12:47:14,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522934860] [2022-11-16 12:47:14,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:14,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:47:14,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:47:14,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:14,457 INFO L87 Difference]: Start difference. First operand 5308 states and 22475 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:14,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:14,860 INFO L93 Difference]: Finished difference Result 5334 states and 22523 transitions. [2022-11-16 12:47:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:47:14,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:47:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:14,877 INFO L225 Difference]: With dead ends: 5334 [2022-11-16 12:47:14,877 INFO L226 Difference]: Without dead ends: 5334 [2022-11-16 12:47:14,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:14,878 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:14,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 144 Unchecked, 0.4s Time] [2022-11-16 12:47:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2022-11-16 12:47:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5298. [2022-11-16 12:47:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5298 states, 5225 states have (on average 4.297607655502392) internal successors, (22455), 5297 states have internal predecessors, (22455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 22455 transitions. [2022-11-16 12:47:14,978 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 22455 transitions. Word has length 9 [2022-11-16 12:47:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:14,978 INFO L495 AbstractCegarLoop]: Abstraction has 5298 states and 22455 transitions. [2022-11-16 12:47:14,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:14,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 22455 transitions. [2022-11-16 12:47:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:47:14,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:14,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:14,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:15,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:15,187 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1095238633, now seen corresponding path program 1 times [2022-11-16 12:47:15,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289592445] [2022-11-16 12:47:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:15,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:15,189 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-16 12:47:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:47:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:15,604 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-16 12:47:15,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-16 12:47:16,135 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-16 12:47:16,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-16 12:47:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:47:16,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:16,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:16,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289592445] [2022-11-16 12:47:16,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289592445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:16,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:16,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:47:16,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961228103] [2022-11-16 12:47:16,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:16,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:47:16,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:16,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:47:16,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:47:16,638 INFO L87 Difference]: Start difference. First operand 5298 states and 22455 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:16,802 INFO L93 Difference]: Finished difference Result 5303 states and 22465 transitions. [2022-11-16 12:47:16,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:47:16,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:47:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:16,820 INFO L225 Difference]: With dead ends: 5303 [2022-11-16 12:47:16,820 INFO L226 Difference]: Without dead ends: 5303 [2022-11-16 12:47:16,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:47:16,821 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:16,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-11-16 12:47:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2022-11-16 12:47:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5300. [2022-11-16 12:47:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5227 states have (on average 4.29672852496652) internal successors, (22459), 5299 states have internal predecessors, (22459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 22459 transitions. [2022-11-16 12:47:16,930 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 22459 transitions. Word has length 9 [2022-11-16 12:47:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:16,931 INFO L495 AbstractCegarLoop]: Abstraction has 5300 states and 22459 transitions. [2022-11-16 12:47:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 22459 transitions. [2022-11-16 12:47:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:47:16,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:16,932 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:16,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:17,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:17,133 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash 869536495, now seen corresponding path program 2 times [2022-11-16 12:47:17,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:17,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751384983] [2022-11-16 12:47:17,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:47:17,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:17,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:17,135 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:17,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 12:47:17,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:47:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:47:17,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:47:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:17,606 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:47:17,606 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:47:17,902 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 12:47:17,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-16 12:47:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:18,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:47:18,098 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 12:47:18,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 12:47:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:47:18,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:18,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:18,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751384983] [2022-11-16 12:47:18,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751384983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:18,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:18,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:47:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935670729] [2022-11-16 12:47:18,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:18,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:47:18,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:18,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:47:18,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:47:18,161 INFO L87 Difference]: Start difference. First operand 5300 states and 22459 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:18,495 INFO L93 Difference]: Finished difference Result 3931 states and 15875 transitions. [2022-11-16 12:47:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:47:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 12:47:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:18,506 INFO L225 Difference]: With dead ends: 3931 [2022-11-16 12:47:18,506 INFO L226 Difference]: Without dead ends: 3931 [2022-11-16 12:47:18,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:47:18,507 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:18,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 12 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:47:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-16 12:47:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3872. [2022-11-16 12:47:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3838 states have (on average 4.099270453361125) internal successors, (15733), 3871 states have internal predecessors, (15733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 15733 transitions. [2022-11-16 12:47:18,577 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 15733 transitions. Word has length 9 [2022-11-16 12:47:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:18,578 INFO L495 AbstractCegarLoop]: Abstraction has 3872 states and 15733 transitions. [2022-11-16 12:47:18,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 15733 transitions. [2022-11-16 12:47:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:47:18,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:18,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:18,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:47:18,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:18,781 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:18,781 INFO L85 PathProgramCache]: Analyzing trace with hash 867337596, now seen corresponding path program 1 times [2022-11-16 12:47:18,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:18,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081487473] [2022-11-16 12:47:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:18,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:18,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:18,783 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:18,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 12:47:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:47:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:19,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:47:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:19,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:20,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081487473] [2022-11-16 12:47:20,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081487473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:20,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:20,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 12:47:20,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668305476] [2022-11-16 12:47:20,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:20,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:47:20,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:47:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:47:20,608 INFO L87 Difference]: Start difference. First operand 3872 states and 15733 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:22,682 INFO L93 Difference]: Finished difference Result 3930 states and 15901 transitions. [2022-11-16 12:47:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:47:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 10 [2022-11-16 12:47:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:22,693 INFO L225 Difference]: With dead ends: 3930 [2022-11-16 12:47:22,693 INFO L226 Difference]: Without dead ends: 3930 [2022-11-16 12:47:22,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:47:22,694 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:22,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 44 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 125 Unchecked, 0.4s Time] [2022-11-16 12:47:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2022-11-16 12:47:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3884. [2022-11-16 12:47:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3850 states have (on average 4.096103896103896) internal successors, (15770), 3883 states have internal predecessors, (15770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 15770 transitions. [2022-11-16 12:47:22,764 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 15770 transitions. Word has length 10 [2022-11-16 12:47:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:22,764 INFO L495 AbstractCegarLoop]: Abstraction has 3884 states and 15770 transitions. [2022-11-16 12:47:22,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 15770 transitions. [2022-11-16 12:47:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:47:22,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:22,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:22,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:22,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:22,966 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash 867333848, now seen corresponding path program 1 times [2022-11-16 12:47:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:22,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153864073] [2022-11-16 12:47:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:22,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:22,968 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:22,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-16 12:47:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:47:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:23,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:23,389 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:47:23,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:47:23,485 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:47:23,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:47:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:47:23,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:23,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153864073] [2022-11-16 12:47:23,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153864073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:23,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:23,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233700910] [2022-11-16 12:47:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:23,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:23,575 INFO L87 Difference]: Start difference. First operand 3884 states and 15770 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:23,753 INFO L93 Difference]: Finished difference Result 3888 states and 15780 transitions. [2022-11-16 12:47:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:23,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:47:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:23,769 INFO L225 Difference]: With dead ends: 3888 [2022-11-16 12:47:23,769 INFO L226 Difference]: Without dead ends: 3888 [2022-11-16 12:47:23,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:23,770 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:23,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-16 12:47:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2022-11-16 12:47:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 3888. [2022-11-16 12:47:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3854 states have (on average 4.094447327451998) internal successors, (15780), 3887 states have internal predecessors, (15780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 15780 transitions. [2022-11-16 12:47:23,874 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 15780 transitions. Word has length 10 [2022-11-16 12:47:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:23,874 INFO L495 AbstractCegarLoop]: Abstraction has 3888 states and 15780 transitions. [2022-11-16 12:47:23,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 15780 transitions. [2022-11-16 12:47:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:47:23,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:23,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:23,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:47:24,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:24,088 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash 867336545, now seen corresponding path program 1 times [2022-11-16 12:47:24,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:24,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565775348] [2022-11-16 12:47:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:24,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:24,090 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:24,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-16 12:47:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:47:24,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:24,521 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:47:24,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:47:25,198 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:47:25,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:47:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:47:25,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:47:25,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565775348] [2022-11-16 12:47:25,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565775348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:47:25,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:47:25,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:47:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080261377] [2022-11-16 12:47:25,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:47:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:47:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:47:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:25,580 INFO L87 Difference]: Start difference. First operand 3888 states and 15780 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:25,760 INFO L93 Difference]: Finished difference Result 3890 states and 15783 transitions. [2022-11-16 12:47:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:47:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:47:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:25,776 INFO L225 Difference]: With dead ends: 3890 [2022-11-16 12:47:25,776 INFO L226 Difference]: Without dead ends: 3890 [2022-11-16 12:47:25,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:47:25,777 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:25,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-16 12:47:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-11-16 12:47:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3890. [2022-11-16 12:47:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3856 states have (on average 4.093101659751038) internal successors, (15783), 3889 states have internal predecessors, (15783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 15783 transitions. [2022-11-16 12:47:25,879 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 15783 transitions. Word has length 10 [2022-11-16 12:47:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:25,879 INFO L495 AbstractCegarLoop]: Abstraction has 3890 states and 15783 transitions. [2022-11-16 12:47:25,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 15783 transitions. [2022-11-16 12:47:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:47:25,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:25,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:47:25,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:47:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:26,093 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash 867578843, now seen corresponding path program 1 times [2022-11-16 12:47:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:26,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805556492] [2022-11-16 12:47:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:26,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:26,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:26,095 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:26,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 12:47:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:47:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:26,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:47:26,516 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:47:26,517 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:47:26,526 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 22 treesize of output 20 [2022-11-16 12:47:26,590 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:47:26,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:47:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:26,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:27,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:27,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805556492] [2022-11-16 12:47:27,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805556492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:27,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:27,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-11-16 12:47:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779693434] [2022-11-16 12:47:27,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:47:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:47:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:27,330 INFO L87 Difference]: Start difference. First operand 3890 states and 15783 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:47:27,836 INFO L93 Difference]: Finished difference Result 6603 states and 27285 transitions. [2022-11-16 12:47:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:47:27,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:47:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:47:27,856 INFO L225 Difference]: With dead ends: 6603 [2022-11-16 12:47:27,856 INFO L226 Difference]: Without dead ends: 6603 [2022-11-16 12:47:27,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:47:27,857 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:47:27,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 57 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 144 Unchecked, 0.5s Time] [2022-11-16 12:47:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2022-11-16 12:47:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 5212. [2022-11-16 12:47:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 5178 states have (on average 4.265932792584009) internal successors, (22089), 5211 states have internal predecessors, (22089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 22089 transitions. [2022-11-16 12:47:27,975 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 22089 transitions. Word has length 10 [2022-11-16 12:47:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:47:27,976 INFO L495 AbstractCegarLoop]: Abstraction has 5212 states and 22089 transitions. [2022-11-16 12:47:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 22089 transitions. [2022-11-16 12:47:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:47:27,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:47:27,976 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-11-16 12:47:27,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:47:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:28,177 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:47:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:47:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash -647516023, now seen corresponding path program 1 times [2022-11-16 12:47:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:47:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670774599] [2022-11-16 12:47:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:47:28,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:47:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:47:28,178 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:47:28,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-16 12:47:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:47:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:47:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:47:28,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:47:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:28,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:47:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:47:31,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:47:31,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670774599] [2022-11-16 12:47:31,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670774599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:47:31,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:47:31,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 12:47:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538489564] [2022-11-16 12:47:31,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:47:31,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:47:31,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:47:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:47:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:47:31,027 INFO L87 Difference]: Start difference. First operand 5212 states and 22089 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:47:36,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:47:38,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:47:40,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:47:41,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:47:43,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:47:45,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:47:47,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:01,726 INFO L93 Difference]: Finished difference Result 43597 states and 182712 transitions. [2022-11-16 12:48:01,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:48:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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 10 [2022-11-16 12:48:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:01,918 INFO L225 Difference]: With dead ends: 43597 [2022-11-16 12:48:01,919 INFO L226 Difference]: Without dead ends: 43597 [2022-11-16 12:48:01,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:48:01,919 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2350 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 126 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2350 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:01,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2350 Valid, 418 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2737 Invalid, 5 Unknown, 0 Unchecked, 25.0s Time] [2022-11-16 12:48:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43597 states. [2022-11-16 12:48:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43597 to 5225. [2022-11-16 12:48:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 5191 states have (on average 4.25948757464843) internal successors, (22111), 5224 states have internal predecessors, (22111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 22111 transitions. [2022-11-16 12:48:02,491 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 22111 transitions. Word has length 10 [2022-11-16 12:48:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:02,491 INFO L495 AbstractCegarLoop]: Abstraction has 5225 states and 22111 transitions. [2022-11-16 12:48:02,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:02,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 22111 transitions. [2022-11-16 12:48:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:02,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:02,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:02,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:48:02,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:02,693 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 494976365, now seen corresponding path program 1 times [2022-11-16 12:48:02,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:02,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940676093] [2022-11-16 12:48:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:02,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:02,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:02,696 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:02,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-16 12:48:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:48:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:02,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:03,093 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:48:03,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:48:03,793 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:48:03,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:48:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:04,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:04,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:04,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940676093] [2022-11-16 12:48:04,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940676093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:04,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:04,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:48:04,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832488445] [2022-11-16 12:48:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:04,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:04,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:04,103 INFO L87 Difference]: Start difference. First operand 5225 states and 22111 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:04,258 INFO L93 Difference]: Finished difference Result 5225 states and 22109 transitions. [2022-11-16 12:48:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:48:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:04,274 INFO L225 Difference]: With dead ends: 5225 [2022-11-16 12:48:04,274 INFO L226 Difference]: Without dead ends: 5225 [2022-11-16 12:48:04,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:04,274 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:04,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 12:48:04,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2022-11-16 12:48:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 5225. [2022-11-16 12:48:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 5191 states have (on average 4.259102292429205) internal successors, (22109), 5224 states have internal predecessors, (22109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 22109 transitions. [2022-11-16 12:48:04,372 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 22109 transitions. Word has length 10 [2022-11-16 12:48:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:04,372 INFO L495 AbstractCegarLoop]: Abstraction has 5225 states and 22109 transitions. [2022-11-16 12:48:04,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 22109 transitions. [2022-11-16 12:48:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:04,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:04,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:04,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:48:04,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:04,575 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:04,575 INFO L85 PathProgramCache]: Analyzing trace with hash 494960648, now seen corresponding path program 1 times [2022-11-16 12:48:04,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:04,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730482691] [2022-11-16 12:48:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:04,576 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 [2022-11-16 12:48:04,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:04,576 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:04,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 12:48:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:48:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:05,004 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-16 12:48:05,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-16 12:48:05,400 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-16 12:48:05,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2022-11-16 12:48:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:05,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:05,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:05,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730482691] [2022-11-16 12:48:05,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730482691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:05,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:05,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:05,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853052866] [2022-11-16 12:48:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:05,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:05,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:05,661 INFO L87 Difference]: Start difference. First operand 5225 states and 22109 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:05,810 INFO L93 Difference]: Finished difference Result 5232 states and 22129 transitions. [2022-11-16 12:48:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:05,810 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 [2022-11-16 12:48:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:05,826 INFO L225 Difference]: With dead ends: 5232 [2022-11-16 12:48:05,826 INFO L226 Difference]: Without dead ends: 5232 [2022-11-16 12:48:05,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:05,827 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:05,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-16 12:48:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2022-11-16 12:48:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 5227. [2022-11-16 12:48:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5227 states, 5193 states have (on average 4.258617369535914) internal successors, (22115), 5226 states have internal predecessors, (22115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5227 states to 5227 states and 22115 transitions. [2022-11-16 12:48:05,923 INFO L78 Accepts]: Start accepts. Automaton has 5227 states and 22115 transitions. Word has length 10 [2022-11-16 12:48:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:05,923 INFO L495 AbstractCegarLoop]: Abstraction has 5227 states and 22115 transitions. [2022-11-16 12:48:05,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5227 states and 22115 transitions. [2022-11-16 12:48:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:05,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:05,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:05,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:06,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:06,125 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash 493741418, now seen corresponding path program 2 times [2022-11-16 12:48:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:06,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160534744] [2022-11-16 12:48:06,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:48:06,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:06,127 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:06,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-16 12:48:06,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:48:06,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:06,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:48:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:06,492 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-16 12:48:06,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-16 12:48:06,870 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-16 12:48:06,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2022-11-16 12:48:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:07,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:07,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:07,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160534744] [2022-11-16 12:48:07,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160534744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:07,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:07,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:07,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067053150] [2022-11-16 12:48:07,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:07,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:07,130 INFO L87 Difference]: Start difference. First operand 5227 states and 22115 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:07,308 INFO L93 Difference]: Finished difference Result 5232 states and 22127 transitions. [2022-11-16 12:48:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:07,309 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 [2022-11-16 12:48:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:07,324 INFO L225 Difference]: With dead ends: 5232 [2022-11-16 12:48:07,324 INFO L226 Difference]: Without dead ends: 5232 [2022-11-16 12:48:07,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:07,324 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:07,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-11-16 12:48:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2022-11-16 12:48:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 5228. [2022-11-16 12:48:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 5194 states have (on average 4.258182518290335) internal successors, (22117), 5227 states have internal predecessors, (22117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 22117 transitions. [2022-11-16 12:48:07,421 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 22117 transitions. Word has length 10 [2022-11-16 12:48:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:07,422 INFO L495 AbstractCegarLoop]: Abstraction has 5228 states and 22117 transitions. [2022-11-16 12:48:07,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 22117 transitions. [2022-11-16 12:48:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:07,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:07,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:07,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:48:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:07,623 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash 274200968, now seen corresponding path program 3 times [2022-11-16 12:48:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:07,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485650481] [2022-11-16 12:48:07,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:48:07,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:07,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:07,625 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-16 12:48:07,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:48:07,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:07,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:48:07,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:08,000 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-16 12:48:08,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-16 12:48:08,375 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-16 12:48:08,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2022-11-16 12:48:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:08,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:08,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:08,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485650481] [2022-11-16 12:48:08,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485650481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:08,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:08,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:08,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95125569] [2022-11-16 12:48:08,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:08,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:08,600 INFO L87 Difference]: Start difference. First operand 5228 states and 22117 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:08,765 INFO L93 Difference]: Finished difference Result 5232 states and 22127 transitions. [2022-11-16 12:48:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:08,766 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 [2022-11-16 12:48:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:08,781 INFO L225 Difference]: With dead ends: 5232 [2022-11-16 12:48:08,782 INFO L226 Difference]: Without dead ends: 5232 [2022-11-16 12:48:08,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:08,782 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:08,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-16 12:48:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2022-11-16 12:48:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 5229. [2022-11-16 12:48:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 5195 states have (on average 4.257747834456208) internal successors, (22119), 5228 states have internal predecessors, (22119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 22119 transitions. [2022-11-16 12:48:08,879 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 22119 transitions. Word has length 10 [2022-11-16 12:48:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:08,879 INFO L495 AbstractCegarLoop]: Abstraction has 5229 states and 22119 transitions. [2022-11-16 12:48:08,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 22119 transitions. [2022-11-16 12:48:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:08,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:08,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:08,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:09,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:09,080 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:09,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:09,081 INFO L85 PathProgramCache]: Analyzing trace with hash 274104963, now seen corresponding path program 1 times [2022-11-16 12:48:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:09,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578495832] [2022-11-16 12:48:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:09,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:09,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:09,082 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:09,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 12:48:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:09,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:48:09,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:09,495 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-16 12:48:09,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-16 12:48:10,053 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-16 12:48:10,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-16 12:48:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:10,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:10,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:10,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578495832] [2022-11-16 12:48:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578495832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:10,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:10,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3758833] [2022-11-16 12:48:10,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:10,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:10,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:10,613 INFO L87 Difference]: Start difference. First operand 5229 states and 22119 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:10,769 INFO L93 Difference]: Finished difference Result 5229 states and 22118 transitions. [2022-11-16 12:48:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:10,770 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 [2022-11-16 12:48:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:10,785 INFO L225 Difference]: With dead ends: 5229 [2022-11-16 12:48:10,785 INFO L226 Difference]: Without dead ends: 5229 [2022-11-16 12:48:10,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:10,790 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:10,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-16 12:48:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2022-11-16 12:48:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 5229. [2022-11-16 12:48:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 5195 states have (on average 4.257555341674688) internal successors, (22118), 5228 states have internal predecessors, (22118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 22118 transitions. [2022-11-16 12:48:10,888 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 22118 transitions. Word has length 10 [2022-11-16 12:48:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:10,888 INFO L495 AbstractCegarLoop]: Abstraction has 5229 states and 22118 transitions. [2022-11-16 12:48:10,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 22118 transitions. [2022-11-16 12:48:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:10,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:10,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:10,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:11,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:11,103 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash 407338570, now seen corresponding path program 1 times [2022-11-16 12:48:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:11,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064783883] [2022-11-16 12:48:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:11,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:11,105 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:11,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-16 12:48:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:11,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:48:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:11,543 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-16 12:48:11,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-16 12:48:12,114 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-16 12:48:12,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-16 12:48:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:48:12,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:12,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:12,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064783883] [2022-11-16 12:48:12,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064783883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:12,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:12,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:12,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078432770] [2022-11-16 12:48:12,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:12,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:12,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:12,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:12,661 INFO L87 Difference]: Start difference. First operand 5229 states and 22118 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:12,810 INFO L93 Difference]: Finished difference Result 5227 states and 22111 transitions. [2022-11-16 12:48:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:12,810 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 [2022-11-16 12:48:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:12,825 INFO L225 Difference]: With dead ends: 5227 [2022-11-16 12:48:12,826 INFO L226 Difference]: Without dead ends: 5227 [2022-11-16 12:48:12,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:12,826 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:12,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-11-16 12:48:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2022-11-16 12:48:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 5225. [2022-11-16 12:48:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5225 states, 5191 states have (on average 4.2587170102099785) internal successors, (22107), 5224 states have internal predecessors, (22107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5225 states to 5225 states and 22107 transitions. [2022-11-16 12:48:12,925 INFO L78 Accepts]: Start accepts. Automaton has 5225 states and 22107 transitions. Word has length 10 [2022-11-16 12:48:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:12,925 INFO L495 AbstractCegarLoop]: Abstraction has 5225 states and 22107 transitions. [2022-11-16 12:48:12,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5225 states and 22107 transitions. [2022-11-16 12:48:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:12,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:12,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:12,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:48:13,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:13,127 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:13,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1182053552, now seen corresponding path program 1 times [2022-11-16 12:48:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:13,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481298266] [2022-11-16 12:48:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:13,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:13,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:13,128 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:13,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-16 12:48:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:48:13,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:13,557 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:48:13,558 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:48:13,568 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 22 treesize of output 20 [2022-11-16 12:48:13,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:13,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:48:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:13,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:13,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:13,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481298266] [2022-11-16 12:48:13,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481298266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:13,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:13,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770931102] [2022-11-16 12:48:13,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:13,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:48:13,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:48:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:48:13,769 INFO L87 Difference]: Start difference. First operand 5225 states and 22107 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:14,011 INFO L93 Difference]: Finished difference Result 5227 states and 22109 transitions. [2022-11-16 12:48:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:14,027 INFO L225 Difference]: With dead ends: 5227 [2022-11-16 12:48:14,028 INFO L226 Difference]: Without dead ends: 5227 [2022-11-16 12:48:14,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:14,028 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:14,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-16 12:48:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2022-11-16 12:48:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 5227. [2022-11-16 12:48:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5227 states, 5193 states have (on average 4.257461968033891) internal successors, (22109), 5226 states have internal predecessors, (22109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5227 states to 5227 states and 22109 transitions. [2022-11-16 12:48:14,124 INFO L78 Accepts]: Start accepts. Automaton has 5227 states and 22109 transitions. Word has length 11 [2022-11-16 12:48:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:14,124 INFO L495 AbstractCegarLoop]: Abstraction has 5227 states and 22109 transitions. [2022-11-16 12:48:14,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 5227 states and 22109 transitions. [2022-11-16 12:48:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:14,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:14,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:14,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:14,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:14,325 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1413978352, now seen corresponding path program 1 times [2022-11-16 12:48:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:14,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917591904] [2022-11-16 12:48:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:14,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:14,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:14,327 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:14,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 12:48:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:14,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:48:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:14,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:14,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917591904] [2022-11-16 12:48:14,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917591904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:14,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:14,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874388562] [2022-11-16 12:48:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:14,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:14,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:14,564 INFO L87 Difference]: Start difference. First operand 5227 states and 22109 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:14,773 INFO L93 Difference]: Finished difference Result 4369 states and 17688 transitions. [2022-11-16 12:48:14,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:14,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:14,789 INFO L225 Difference]: With dead ends: 4369 [2022-11-16 12:48:14,789 INFO L226 Difference]: Without dead ends: 4297 [2022-11-16 12:48:14,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:14,790 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:14,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:48:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2022-11-16 12:48:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 4297. [2022-11-16 12:48:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4271 states have (on average 4.09084523530789) internal successors, (17472), 4296 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 17472 transitions. [2022-11-16 12:48:14,869 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 17472 transitions. Word has length 11 [2022-11-16 12:48:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:14,869 INFO L495 AbstractCegarLoop]: Abstraction has 4297 states and 17472 transitions. [2022-11-16 12:48:14,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 17472 transitions. [2022-11-16 12:48:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:14,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:14,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:14,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:15,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:15,072 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1413742034, now seen corresponding path program 1 times [2022-11-16 12:48:15,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:15,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190785629] [2022-11-16 12:48:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:15,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:15,073 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:15,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 12:48:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:15,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:48:15,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:15,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:15,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:15,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190785629] [2022-11-16 12:48:15,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190785629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:15,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:15,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:48:15,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909204754] [2022-11-16 12:48:15,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:15,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:15,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:15,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:15,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:15,393 INFO L87 Difference]: Start difference. First operand 4297 states and 17472 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) [2022-11-16 12:48:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:16,329 INFO L93 Difference]: Finished difference Result 5618 states and 22892 transitions. [2022-11-16 12:48:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:48:16,329 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 [2022-11-16 12:48:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:16,346 INFO L225 Difference]: With dead ends: 5618 [2022-11-16 12:48:16,347 INFO L226 Difference]: Without dead ends: 5589 [2022-11-16 12:48:16,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:48:16,347 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 107 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:16,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 21 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:48:16,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5589 states. [2022-11-16 12:48:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5589 to 4144. [2022-11-16 12:48:16,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4118 states have (on average 4.032054395337543) internal successors, (16604), 4143 states have internal predecessors, (16604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 16604 transitions. [2022-11-16 12:48:16,525 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 16604 transitions. Word has length 11 [2022-11-16 12:48:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:16,526 INFO L495 AbstractCegarLoop]: Abstraction has 4144 states and 16604 transitions. [2022-11-16 12:48:16,526 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) [2022-11-16 12:48:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 16604 transitions. [2022-11-16 12:48:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:16,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:16,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:16,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-16 12:48:16,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:16,739 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1117659830, now seen corresponding path program 1 times [2022-11-16 12:48:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:16,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552543854] [2022-11-16 12:48:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:16,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:16,742 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:16,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-16 12:48:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:48:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:16,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:48:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:17,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:18,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552543854] [2022-11-16 12:48:18,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552543854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:18,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 12:48:18,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18596649] [2022-11-16 12:48:18,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:18,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:48:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:48:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:48:18,327 INFO L87 Difference]: Start difference. First operand 4144 states and 16604 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:19,478 INFO L93 Difference]: Finished difference Result 4610 states and 18201 transitions. [2022-11-16 12:48:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:19,490 INFO L225 Difference]: With dead ends: 4610 [2022-11-16 12:48:19,490 INFO L226 Difference]: Without dead ends: 4424 [2022-11-16 12:48:19,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:48:19,491 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 127 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:19,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 44 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2022-11-16 12:48:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2022-11-16 12:48:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4286. [2022-11-16 12:48:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4260 states have (on average 4.041079812206573) internal successors, (17215), 4285 states have internal predecessors, (17215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 17215 transitions. [2022-11-16 12:48:19,571 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 17215 transitions. Word has length 11 [2022-11-16 12:48:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:19,572 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 17215 transitions. [2022-11-16 12:48:19,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 17215 transitions. [2022-11-16 12:48:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:19,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:19,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:19,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:19,773 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1117542033, now seen corresponding path program 1 times [2022-11-16 12:48:19,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:19,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739162288] [2022-11-16 12:48:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:19,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:19,775 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:19,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 12:48:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:48:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:20,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:20,210 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:48:20,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:48:20,300 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:48:20,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:48:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:20,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:20,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:20,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739162288] [2022-11-16 12:48:20,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739162288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:20,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:20,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:48:20,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375980231] [2022-11-16 12:48:20,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:20,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:20,406 INFO L87 Difference]: Start difference. First operand 4286 states and 17215 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:20,559 INFO L93 Difference]: Finished difference Result 4278 states and 17185 transitions. [2022-11-16 12:48:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:20,571 INFO L225 Difference]: With dead ends: 4278 [2022-11-16 12:48:20,571 INFO L226 Difference]: Without dead ends: 4278 [2022-11-16 12:48:20,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:20,572 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:20,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-16 12:48:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2022-11-16 12:48:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 4272. [2022-11-16 12:48:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4272 states, 4246 states have (on average 4.044276966556759) internal successors, (17172), 4271 states have internal predecessors, (17172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4272 states to 4272 states and 17172 transitions. [2022-11-16 12:48:20,649 INFO L78 Accepts]: Start accepts. Automaton has 4272 states and 17172 transitions. Word has length 11 [2022-11-16 12:48:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:20,649 INFO L495 AbstractCegarLoop]: Abstraction has 4272 states and 17172 transitions. [2022-11-16 12:48:20,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4272 states and 17172 transitions. [2022-11-16 12:48:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:20,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:20,650 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:20,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:20,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:20,851 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1458783238, now seen corresponding path program 2 times [2022-11-16 12:48:20,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852227243] [2022-11-16 12:48:20,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:48:20,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:20,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:20,852 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:20,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 12:48:21,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:48:21,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:48:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:21,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:48:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:48:21,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:21,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:21,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852227243] [2022-11-16 12:48:21,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852227243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:21,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:21,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:21,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364885884] [2022-11-16 12:48:21,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:21,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:48:21,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:48:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:48:21,231 INFO L87 Difference]: Start difference. First operand 4272 states and 17172 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:21,546 INFO L93 Difference]: Finished difference Result 3423 states and 13404 transitions. [2022-11-16 12:48:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:48:21,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 11 [2022-11-16 12:48:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:21,555 INFO L225 Difference]: With dead ends: 3423 [2022-11-16 12:48:21,555 INFO L226 Difference]: Without dead ends: 3203 [2022-11-16 12:48:21,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:21,555 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:21,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:48:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2022-11-16 12:48:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 3059. [2022-11-16 12:48:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3048 states have (on average 3.9343832020997374) internal successors, (11992), 3058 states have internal predecessors, (11992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 11992 transitions. [2022-11-16 12:48:21,610 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 11992 transitions. Word has length 11 [2022-11-16 12:48:21,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:21,610 INFO L495 AbstractCegarLoop]: Abstraction has 3059 states and 11992 transitions. [2022-11-16 12:48:21,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 11992 transitions. [2022-11-16 12:48:21,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:21,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:21,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:21,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:21,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:21,812 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1836092141, now seen corresponding path program 1 times [2022-11-16 12:48:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:21,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984995218] [2022-11-16 12:48:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:21,813 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 [2022-11-16 12:48:21,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:21,814 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:21,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-16 12:48:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:22,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:48:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:22,246 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-16 12:48:22,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-16 12:48:22,345 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:48:22,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:48:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:22,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:22,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984995218] [2022-11-16 12:48:22,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984995218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:22,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:22,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:22,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721735398] [2022-11-16 12:48:22,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:22,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:22,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:22,472 INFO L87 Difference]: Start difference. First operand 3059 states and 11992 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:22,730 INFO L93 Difference]: Finished difference Result 3053 states and 11974 transitions. [2022-11-16 12:48:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:22,738 INFO L225 Difference]: With dead ends: 3053 [2022-11-16 12:48:22,738 INFO L226 Difference]: Without dead ends: 3053 [2022-11-16 12:48:22,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:22,739 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:22,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-16 12:48:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2022-11-16 12:48:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 3049. [2022-11-16 12:48:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3049 states, 3038 states have (on average 3.9381171823568137) internal successors, (11964), 3048 states have internal predecessors, (11964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3049 states to 3049 states and 11964 transitions. [2022-11-16 12:48:22,792 INFO L78 Accepts]: Start accepts. Automaton has 3049 states and 11964 transitions. Word has length 11 [2022-11-16 12:48:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:22,792 INFO L495 AbstractCegarLoop]: Abstraction has 3049 states and 11964 transitions. [2022-11-16 12:48:22,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3049 states and 11964 transitions. [2022-11-16 12:48:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:22,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:22,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:22,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:22,994 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:22,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash -36536619, now seen corresponding path program 1 times [2022-11-16 12:48:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428380655] [2022-11-16 12:48:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:22,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:22,996 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:22,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 12:48:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 12:48:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:23,473 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:48:23,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:48:23,601 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:48:23,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:48:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:48:23,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:23,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:23,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428380655] [2022-11-16 12:48:23,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428380655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:23,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:23,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:48:23,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27578422] [2022-11-16 12:48:23,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:23,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:23,713 INFO L87 Difference]: Start difference. First operand 3049 states and 11964 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:23,844 INFO L93 Difference]: Finished difference Result 3057 states and 11984 transitions. [2022-11-16 12:48:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:23,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:23,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:23,856 INFO L225 Difference]: With dead ends: 3057 [2022-11-16 12:48:23,856 INFO L226 Difference]: Without dead ends: 3057 [2022-11-16 12:48:23,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:23,857 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:23,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-16 12:48:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-11-16 12:48:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 3053. [2022-11-16 12:48:23,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3042 states have (on average 3.9368836291913216) internal successors, (11976), 3052 states have internal predecessors, (11976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 11976 transitions. [2022-11-16 12:48:23,933 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 11976 transitions. Word has length 11 [2022-11-16 12:48:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:23,933 INFO L495 AbstractCegarLoop]: Abstraction has 3053 states and 11976 transitions. [2022-11-16 12:48:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 11976 transitions. [2022-11-16 12:48:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:23,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:23,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:24,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:24,143 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash -36533922, now seen corresponding path program 1 times [2022-11-16 12:48:24,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:24,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46207759] [2022-11-16 12:48:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:24,145 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:24,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-16 12:48:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:24,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:48:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:24,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:24,653 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-16 12:48:24,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-16 12:48:25,362 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-16 12:48:25,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-16 12:48:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:48:25,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:25,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:25,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46207759] [2022-11-16 12:48:25,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46207759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:25,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:25,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:48:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621695707] [2022-11-16 12:48:25,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:25,814 INFO L87 Difference]: Start difference. First operand 3053 states and 11976 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:25,941 INFO L93 Difference]: Finished difference Result 3057 states and 11984 transitions. [2022-11-16 12:48:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:25,953 INFO L225 Difference]: With dead ends: 3057 [2022-11-16 12:48:25,953 INFO L226 Difference]: Without dead ends: 3057 [2022-11-16 12:48:25,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:25,953 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:25,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-16 12:48:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-11-16 12:48:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 3057. [2022-11-16 12:48:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3046 states have (on average 3.9343401181877873) internal successors, (11984), 3056 states have internal predecessors, (11984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 11984 transitions. [2022-11-16 12:48:26,003 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 11984 transitions. Word has length 11 [2022-11-16 12:48:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:26,003 INFO L495 AbstractCegarLoop]: Abstraction has 3057 states and 11984 transitions. [2022-11-16 12:48:26,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 11984 transitions. [2022-11-16 12:48:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:26,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:26,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:26,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:48:26,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:26,204 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:26,205 INFO L85 PathProgramCache]: Analyzing trace with hash -36549639, now seen corresponding path program 1 times [2022-11-16 12:48:26,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:26,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047323397] [2022-11-16 12:48:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:26,206 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:26,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 12:48:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:48:26,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:26,678 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-16 12:48:26,678 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 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-16 12:48:26,786 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 12:48:26,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 12:48:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:48:26,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:26,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:26,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047323397] [2022-11-16 12:48:26,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047323397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:26,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:26,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:26,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224136009] [2022-11-16 12:48:26,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:26,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:26,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:26,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:26,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:26,935 INFO L87 Difference]: Start difference. First operand 3057 states and 11984 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:27,143 INFO L93 Difference]: Finished difference Result 3007 states and 11794 transitions. [2022-11-16 12:48:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:27,150 INFO L225 Difference]: With dead ends: 3007 [2022-11-16 12:48:27,151 INFO L226 Difference]: Without dead ends: 2992 [2022-11-16 12:48:27,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:27,151 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:27,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 6 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:48:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-11-16 12:48:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2976. [2022-11-16 12:48:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2968 states have (on average 3.9504716981132075) internal successors, (11725), 2975 states have internal predecessors, (11725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 11725 transitions. [2022-11-16 12:48:27,201 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 11725 transitions. Word has length 11 [2022-11-16 12:48:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:27,201 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 11725 transitions. [2022-11-16 12:48:27,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 11725 transitions. [2022-11-16 12:48:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:27,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:27,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:27,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:27,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:27,403 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:27,403 INFO L85 PathProgramCache]: Analyzing trace with hash -257405324, now seen corresponding path program 1 times [2022-11-16 12:48:27,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:27,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167423021] [2022-11-16 12:48:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:27,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:27,404 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:27,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 12:48:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:48:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:27,881 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-16 12:48:27,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-16 12:48:28,453 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-16 12:48:28,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-16 12:48:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:48:29,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:29,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:29,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167423021] [2022-11-16 12:48:29,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167423021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:29,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:29,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:29,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000086288] [2022-11-16 12:48:29,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:29,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:29,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:29,084 INFO L87 Difference]: Start difference. First operand 2976 states and 11725 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:29,199 INFO L93 Difference]: Finished difference Result 2975 states and 11723 transitions. [2022-11-16 12:48:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:29,207 INFO L225 Difference]: With dead ends: 2975 [2022-11-16 12:48:29,207 INFO L226 Difference]: Without dead ends: 2975 [2022-11-16 12:48:29,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:29,207 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:29,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-16 12:48:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2022-11-16 12:48:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2975. [2022-11-16 12:48:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2968 states have (on average 3.949797843665768) internal successors, (11723), 2974 states have internal predecessors, (11723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 11723 transitions. [2022-11-16 12:48:29,256 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 11723 transitions. Word has length 11 [2022-11-16 12:48:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:29,256 INFO L495 AbstractCegarLoop]: Abstraction has 2975 states and 11723 transitions. [2022-11-16 12:48:29,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 11723 transitions. [2022-11-16 12:48:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:48:29,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:29,257 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:29,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-16 12:48:29,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:29,469 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2022606075, now seen corresponding path program 2 times [2022-11-16 12:48:29,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:29,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112171688] [2022-11-16 12:48:29,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:48:29,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:29,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:29,471 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:29,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 12:48:29,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:48:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:29,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:48:29,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:29,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:29,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:29,946 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:48:29,947 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:48:29,957 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 22 treesize of output 20 [2022-11-16 12:48:30,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:30,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:48:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:48:30,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:30,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112171688] [2022-11-16 12:48:30,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112171688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:30,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:30,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884345402] [2022-11-16 12:48:30,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:30,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:48:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:48:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:48:30,172 INFO L87 Difference]: Start difference. First operand 2975 states and 11723 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:30,369 INFO L93 Difference]: Finished difference Result 2991 states and 11791 transitions. [2022-11-16 12:48:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:30,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:48:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:30,377 INFO L225 Difference]: With dead ends: 2991 [2022-11-16 12:48:30,377 INFO L226 Difference]: Without dead ends: 2991 [2022-11-16 12:48:30,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:30,377 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:30,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:48:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2022-11-16 12:48:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2941. [2022-11-16 12:48:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2934 states have (on average 3.9662576687116564) internal successors, (11637), 2940 states have internal predecessors, (11637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 11637 transitions. [2022-11-16 12:48:30,441 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 11637 transitions. Word has length 12 [2022-11-16 12:48:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:30,442 INFO L495 AbstractCegarLoop]: Abstraction has 2941 states and 11637 transitions. [2022-11-16 12:48:30,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 11637 transitions. [2022-11-16 12:48:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:48:30,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:30,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:30,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:30,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:30,651 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash -837877656, now seen corresponding path program 1 times [2022-11-16 12:48:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:30,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576388263] [2022-11-16 12:48:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:30,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:30,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:30,653 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:30,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 12:48:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:48:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:30,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:31,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:31,179 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:48:31,179 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:48:31,191 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 22 treesize of output 20 [2022-11-16 12:48:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:31,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:48:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:31,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:31,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:31,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576388263] [2022-11-16 12:48:31,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576388263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:31,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:31,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269515522] [2022-11-16 12:48:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:48:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:31,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:48:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:48:31,410 INFO L87 Difference]: Start difference. First operand 2941 states and 11637 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:31,606 INFO L93 Difference]: Finished difference Result 2953 states and 11679 transitions. [2022-11-16 12:48:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:48:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:31,614 INFO L225 Difference]: With dead ends: 2953 [2022-11-16 12:48:31,614 INFO L226 Difference]: Without dead ends: 2953 [2022-11-16 12:48:31,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:31,615 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:31,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:48:31,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-11-16 12:48:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2953. [2022-11-16 12:48:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 2946 states have (on average 3.9643584521384927) internal successors, (11679), 2952 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 11679 transitions. [2022-11-16 12:48:31,667 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 11679 transitions. Word has length 12 [2022-11-16 12:48:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:31,667 INFO L495 AbstractCegarLoop]: Abstraction has 2953 states and 11679 transitions. [2022-11-16 12:48:31,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 11679 transitions. [2022-11-16 12:48:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:48:31,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:31,668 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:31,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:48:31,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:31,868 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1666722267, now seen corresponding path program 1 times [2022-11-16 12:48:31,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:31,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266913633] [2022-11-16 12:48:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:31,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:31,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:31,870 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:31,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 12:48:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:48:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:32,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:32,399 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:48:32,400 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:48:32,410 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 22 treesize of output 20 [2022-11-16 12:48:32,476 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:48:32,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:48:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:33,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:34,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:34,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266913633] [2022-11-16 12:48:34,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266913633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:34,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:34,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:48:34,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841197199] [2022-11-16 12:48:34,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:34,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:48:34,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:48:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:48:34,049 INFO L87 Difference]: Start difference. First operand 2953 states and 11679 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:36,433 INFO L93 Difference]: Finished difference Result 4429 states and 17266 transitions. [2022-11-16 12:48:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:48:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:48:36,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:36,445 INFO L225 Difference]: With dead ends: 4429 [2022-11-16 12:48:36,445 INFO L226 Difference]: Without dead ends: 4429 [2022-11-16 12:48:36,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:48:36,446 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 328 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:36,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 109 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 298 Invalid, 0 Unknown, 254 Unchecked, 1.5s Time] [2022-11-16 12:48:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2022-11-16 12:48:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3009. [2022-11-16 12:48:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3002 states have (on average 3.9437041972018654) internal successors, (11839), 3008 states have internal predecessors, (11839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 11839 transitions. [2022-11-16 12:48:36,506 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 11839 transitions. Word has length 13 [2022-11-16 12:48:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:36,507 INFO L495 AbstractCegarLoop]: Abstraction has 3009 states and 11839 transitions. [2022-11-16 12:48:36,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 11839 transitions. [2022-11-16 12:48:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:48:36,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:36,507 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:36,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:36,708 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1666807920, now seen corresponding path program 1 times [2022-11-16 12:48:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:36,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398671638] [2022-11-16 12:48:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:36,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:36,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:36,710 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:36,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 12:48:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:48:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:37,328 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:48:37,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:48:37,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7950 treesize of output 7822 [2022-11-16 12:48:37,731 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:48:37,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:48:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:38,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:39,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:39,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398671638] [2022-11-16 12:48:39,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398671638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:39,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:39,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:48:39,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561137570] [2022-11-16 12:48:39,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:39,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:48:39,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:39,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:48:39,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:48:39,331 INFO L87 Difference]: Start difference. First operand 3009 states and 11839 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:41,203 INFO L93 Difference]: Finished difference Result 4357 states and 16968 transitions. [2022-11-16 12:48:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:48:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:48:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:41,215 INFO L225 Difference]: With dead ends: 4357 [2022-11-16 12:48:41,215 INFO L226 Difference]: Without dead ends: 4296 [2022-11-16 12:48:41,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:48:41,215 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 333 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:41,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 103 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 276 Invalid, 0 Unknown, 239 Unchecked, 1.3s Time] [2022-11-16 12:48:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2022-11-16 12:48:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3017. [2022-11-16 12:48:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3010 states have (on average 3.935880398671096) internal successors, (11847), 3016 states have internal predecessors, (11847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 11847 transitions. [2022-11-16 12:48:41,275 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 11847 transitions. Word has length 13 [2022-11-16 12:48:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:41,275 INFO L495 AbstractCegarLoop]: Abstraction has 3017 states and 11847 transitions. [2022-11-16 12:48:41,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 11847 transitions. [2022-11-16 12:48:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:48:41,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:41,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:41,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-16 12:48:41,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:41,479 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash -204406665, now seen corresponding path program 1 times [2022-11-16 12:48:41,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:41,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720139764] [2022-11-16 12:48:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:41,481 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:41,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 12:48:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:41,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:48:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:41,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:42,020 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:48:42,021 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:48:42,031 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 22 treesize of output 20 [2022-11-16 12:48:42,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:48:42,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:48:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:48:42,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:48:42,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:42,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720139764] [2022-11-16 12:48:42,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720139764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:42,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:42,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:42,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375485548] [2022-11-16 12:48:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:42,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:48:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:48:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:48:42,252 INFO L87 Difference]: Start difference. First operand 3017 states and 11847 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:42,445 INFO L93 Difference]: Finished difference Result 3013 states and 11833 transitions. [2022-11-16 12:48:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:48:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:42,454 INFO L225 Difference]: With dead ends: 3013 [2022-11-16 12:48:42,454 INFO L226 Difference]: Without dead ends: 3013 [2022-11-16 12:48:42,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:42,454 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:42,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:48:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2022-11-16 12:48:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 3001. [2022-11-16 12:48:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3001 states, 2994 states have (on average 3.938209752839011) internal successors, (11791), 3000 states have internal predecessors, (11791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 11791 transitions. [2022-11-16 12:48:42,507 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 11791 transitions. Word has length 13 [2022-11-16 12:48:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:42,508 INFO L495 AbstractCegarLoop]: Abstraction has 3001 states and 11791 transitions. [2022-11-16 12:48:42,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 11791 transitions. [2022-11-16 12:48:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:48:42,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:42,509 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-16 12:48:42,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:42,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:42,718 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:48:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:42,719 INFO L85 PathProgramCache]: Analyzing trace with hash -354834783, now seen corresponding path program 3 times [2022-11-16 12:48:42,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:48:42,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016678634] [2022-11-16 12:48:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:48:42,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:48:42,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:48:42,720 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:48:42,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 12:48:43,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 12:48:43,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:48:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:43,378 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:48:43,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:48:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:44,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:47,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:48:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016678634] [2022-11-16 12:48:47,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016678634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:47,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:48:47,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-16 12:48:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427606388] [2022-11-16 12:48:47,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:47,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:48:47,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:48:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:48:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:48:47,995 INFO L87 Difference]: Start difference. First operand 3001 states and 11791 transitions. Second operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:02,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:04,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:06,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:08,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:10,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:12,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:14,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:16,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:18,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:20,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:22,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:40,783 INFO L93 Difference]: Finished difference Result 17336 states and 69442 transitions. [2022-11-16 12:49:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:49:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:49:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:40,843 INFO L225 Difference]: With dead ends: 17336 [2022-11-16 12:49:40,843 INFO L226 Difference]: Without dead ends: 17336 [2022-11-16 12:49:40,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:49:40,844 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 3873 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 4935 mSolverCounterSat, 256 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3873 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 5201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 4935 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:40,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3873 Valid, 918 Invalid, 5201 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [256 Valid, 4935 Invalid, 10 Unknown, 0 Unchecked, 33.4s Time] [2022-11-16 12:49:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17336 states. [2022-11-16 12:49:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17336 to 3014. [2022-11-16 12:49:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3007 states have (on average 3.9298303957432656) internal successors, (11817), 3013 states have internal predecessors, (11817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 11817 transitions. [2022-11-16 12:49:41,002 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 11817 transitions. Word has length 13 [2022-11-16 12:49:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:41,003 INFO L495 AbstractCegarLoop]: Abstraction has 3014 states and 11817 transitions. [2022-11-16 12:49:41,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 11817 transitions. [2022-11-16 12:49:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:49:41,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:41,004 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:41,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-16 12:49:41,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:41,204 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:49:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash -128786264, now seen corresponding path program 1 times [2022-11-16 12:49:41,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:49:41,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637402089] [2022-11-16 12:49:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:41,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:41,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:49:41,206 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:49:41,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 12:49:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:49:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:41,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:41,817 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:49:41,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:49:41,845 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 1042 treesize of output 1026 [2022-11-16 12:49:41,971 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:49:41,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:49:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:42,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:49:43,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:49:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637402089] [2022-11-16 12:49:43,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637402089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:43,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:49:43,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:49:43,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421507114] [2022-11-16 12:49:43,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:43,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:49:43,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:49:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:49:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:49:43,590 INFO L87 Difference]: Start difference. First operand 3014 states and 11817 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:45,631 INFO L93 Difference]: Finished difference Result 5241 states and 20580 transitions. [2022-11-16 12:49:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:49:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:49:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:45,647 INFO L225 Difference]: With dead ends: 5241 [2022-11-16 12:49:45,647 INFO L226 Difference]: Without dead ends: 5241 [2022-11-16 12:49:45,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:49:45,648 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 356 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:45,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 101 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 287 Invalid, 0 Unknown, 214 Unchecked, 1.4s Time] [2022-11-16 12:49:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2022-11-16 12:49:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 3030. [2022-11-16 12:49:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3030 states, 3023 states have (on average 3.9288785974197817) internal successors, (11877), 3029 states have internal predecessors, (11877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 11877 transitions. [2022-11-16 12:49:45,724 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 11877 transitions. Word has length 14 [2022-11-16 12:49:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:45,724 INFO L495 AbstractCegarLoop]: Abstraction has 3030 states and 11877 transitions. [2022-11-16 12:49:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 11877 transitions. [2022-11-16 12:49:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:49:45,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:45,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:45,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-16 12:49:45,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:45,939 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:49:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash -23843598, now seen corresponding path program 1 times [2022-11-16 12:49:45,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:49:45,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683735999] [2022-11-16 12:49:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:45,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:49:45,941 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:49:45,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 12:49:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:49:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:46,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:46,569 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:49:46,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:49:46,596 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 1998 treesize of output 1966 [2022-11-16 12:49:46,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:46,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:49:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:46,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:49:46,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:49:46,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683735999] [2022-11-16 12:49:46,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683735999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:46,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:46,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:46,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100880200] [2022-11-16 12:49:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:49:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:49:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:49:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:49:46,930 INFO L87 Difference]: Start difference. First operand 3030 states and 11877 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:47,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:47,136 INFO L93 Difference]: Finished difference Result 3047 states and 11933 transitions. [2022-11-16 12:49:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:49:47,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:49:47,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:47,145 INFO L225 Difference]: With dead ends: 3047 [2022-11-16 12:49:47,145 INFO L226 Difference]: Without dead ends: 3047 [2022-11-16 12:49:47,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:47,146 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:47,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:49:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-11-16 12:49:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 3047. [2022-11-16 12:49:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3040 states have (on average 3.925328947368421) internal successors, (11933), 3046 states have internal predecessors, (11933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 11933 transitions. [2022-11-16 12:49:47,198 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 11933 transitions. Word has length 14 [2022-11-16 12:49:47,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:47,198 INFO L495 AbstractCegarLoop]: Abstraction has 3047 states and 11933 transitions. [2022-11-16 12:49:47,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:47,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 11933 transitions. [2022-11-16 12:49:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:49:47,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:47,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:47,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-16 12:49:47,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:47,400 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:49:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2041749064, now seen corresponding path program 1 times [2022-11-16 12:49:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:49:47,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528408465] [2022-11-16 12:49:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:47,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:47,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:49:47,402 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:49:47,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 12:49:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:47,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:49:47,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:48,048 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:49:48,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:49:48,081 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 2355 treesize of output 2323 [2022-11-16 12:49:48,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:48,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:49:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:48,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:49:48,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:49:48,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528408465] [2022-11-16 12:49:48,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528408465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:48,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:48,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385658028] [2022-11-16 12:49:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:48,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:49:48,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:49:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:49:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:49:48,432 INFO L87 Difference]: Start difference. First operand 3047 states and 11933 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:48,624 INFO L93 Difference]: Finished difference Result 3051 states and 11951 transitions. [2022-11-16 12:49:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:49:48,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:49:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:48,632 INFO L225 Difference]: With dead ends: 3051 [2022-11-16 12:49:48,632 INFO L226 Difference]: Without dead ends: 3051 [2022-11-16 12:49:48,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:48,632 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:48,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:49:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2022-11-16 12:49:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3051. [2022-11-16 12:49:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 3044 states have (on average 3.9260840998685937) internal successors, (11951), 3050 states have internal predecessors, (11951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 11951 transitions. [2022-11-16 12:49:48,702 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 11951 transitions. Word has length 14 [2022-11-16 12:49:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:48,702 INFO L495 AbstractCegarLoop]: Abstraction has 3051 states and 11951 transitions. [2022-11-16 12:49:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 11951 transitions. [2022-11-16 12:49:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:49:48,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:48,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:48,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 12:49:48,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:48,904 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:49:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:48,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2041747018, now seen corresponding path program 1 times [2022-11-16 12:49:48,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:49:48,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319430991] [2022-11-16 12:49:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:48,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:48,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:49:48,905 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:49:48,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 12:49:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:49,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:49:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:49,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:49:49,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:49:49,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319430991] [2022-11-16 12:49:49,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319430991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:49,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:49,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:49:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343768155] [2022-11-16 12:49:49,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:49,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:49:49,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:49:49,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:49:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:49,240 INFO L87 Difference]: Start difference. First operand 3051 states and 11951 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:50,132 INFO L93 Difference]: Finished difference Result 3953 states and 15710 transitions. [2022-11-16 12:49:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:49:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:49:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:50,144 INFO L225 Difference]: With dead ends: 3953 [2022-11-16 12:49:50,145 INFO L226 Difference]: Without dead ends: 3953 [2022-11-16 12:49:50,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:49:50,145 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:50,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 36 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:49:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2022-11-16 12:49:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3056. [2022-11-16 12:49:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3049 states have (on average 3.9262053132174484) internal successors, (11971), 3055 states have internal predecessors, (11971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 11971 transitions. [2022-11-16 12:49:50,226 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 11971 transitions. Word has length 14 [2022-11-16 12:49:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:50,227 INFO L495 AbstractCegarLoop]: Abstraction has 3056 states and 11971 transitions. [2022-11-16 12:49:50,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 11971 transitions. [2022-11-16 12:49:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:49:50,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:50,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:50,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:49:50,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:50,429 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:49:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2041639355, now seen corresponding path program 1 times [2022-11-16 12:49:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:49:50,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535030474] [2022-11-16 12:49:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:50,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:50,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:49:50,430 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:49:50,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 12:49:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:49:50,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:50,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:51,144 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:49:51,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:49:51,173 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 182 treesize of output 178 [2022-11-16 12:49:51,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:51,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:49:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:49:51,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:49:51,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:49:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535030474] [2022-11-16 12:49:51,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535030474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:49:51,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:49:51,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:49:51,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703695088] [2022-11-16 12:49:51,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:49:51,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:49:51,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:49:51,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:49:51,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:49:51,482 INFO L87 Difference]: Start difference. First operand 3056 states and 11971 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:51,682 INFO L93 Difference]: Finished difference Result 3058 states and 11979 transitions. [2022-11-16 12:49:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:49:51,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:49:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:51,691 INFO L225 Difference]: With dead ends: 3058 [2022-11-16 12:49:51,691 INFO L226 Difference]: Without dead ends: 3058 [2022-11-16 12:49:51,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:49:51,692 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:51,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:49:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-11-16 12:49:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 3058. [2022-11-16 12:49:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3051 states have (on average 3.926253687315634) internal successors, (11979), 3057 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 11979 transitions. [2022-11-16 12:49:51,763 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 11979 transitions. Word has length 14 [2022-11-16 12:49:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:51,763 INFO L495 AbstractCegarLoop]: Abstraction has 3058 states and 11979 transitions. [2022-11-16 12:49:51,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:51,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 11979 transitions. [2022-11-16 12:49:51,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:49:51,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:51,765 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:51,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-16 12:49:51,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:51,966 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:49:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash 803305096, now seen corresponding path program 1 times [2022-11-16 12:49:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:49:51,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208291089] [2022-11-16 12:49:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:51,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:51,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:49:51,967 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:49:51,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 12:49:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:52,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:49:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:52,653 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:49:52,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:49:52,682 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 246 treesize of output 242 [2022-11-16 12:49:52,794 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:49:52,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:49:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:53,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:54,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:49:54,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208291089] [2022-11-16 12:49:54,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208291089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:54,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:49:54,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:49:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006813903] [2022-11-16 12:49:54,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:54,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:49:54,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:49:54,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:49:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:49:54,587 INFO L87 Difference]: Start difference. First operand 3058 states and 11979 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:49:56,682 INFO L93 Difference]: Finished difference Result 5241 states and 20829 transitions. [2022-11-16 12:49:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:49:56,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:49:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:49:56,697 INFO L225 Difference]: With dead ends: 5241 [2022-11-16 12:49:56,697 INFO L226 Difference]: Without dead ends: 5241 [2022-11-16 12:49:56,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:49:56,698 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 276 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:49:56,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 103 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 299 Invalid, 0 Unknown, 205 Unchecked, 1.4s Time] [2022-11-16 12:49:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2022-11-16 12:49:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 3068. [2022-11-16 12:49:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3061 states have (on average 3.9251878471087878) internal successors, (12015), 3067 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:56,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 12015 transitions. [2022-11-16 12:49:56,787 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 12015 transitions. Word has length 14 [2022-11-16 12:49:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:49:56,787 INFO L495 AbstractCegarLoop]: Abstraction has 3068 states and 12015 transitions. [2022-11-16 12:49:56,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:49:56,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 12015 transitions. [2022-11-16 12:49:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:49:56,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:49:56,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:49:56,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-16 12:49:56,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:56,990 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:49:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:49:56,990 INFO L85 PathProgramCache]: Analyzing trace with hash 302593014, now seen corresponding path program 1 times [2022-11-16 12:49:56,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:49:56,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946786854] [2022-11-16 12:49:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:49:56,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:49:56,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:49:56,991 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:49:56,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 12:49:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:49:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:49:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:49:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:57,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:49:57,581 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:49:57,581 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:49:57,594 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 22 treesize of output 20 [2022-11-16 12:49:57,660 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:49:57,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:49:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:58,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:49:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:49:59,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:49:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946786854] [2022-11-16 12:49:59,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946786854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:49:59,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:49:59,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:49:59,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118848699] [2022-11-16 12:49:59,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:49:59,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:49:59,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:49:59,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:49:59,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:49:59,524 INFO L87 Difference]: Start difference. First operand 3068 states and 12015 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:01,527 INFO L93 Difference]: Finished difference Result 5024 states and 19859 transitions. [2022-11-16 12:50:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:50:01,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:50:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:01,541 INFO L225 Difference]: With dead ends: 5024 [2022-11-16 12:50:01,542 INFO L226 Difference]: Without dead ends: 4979 [2022-11-16 12:50:01,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:50:01,542 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 305 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:01,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 108 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 242 Unchecked, 1.4s Time] [2022-11-16 12:50:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2022-11-16 12:50:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 3031. [2022-11-16 12:50:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3024 states have (on average 3.9441137566137567) internal successors, (11927), 3030 states have internal predecessors, (11927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 11927 transitions. [2022-11-16 12:50:01,625 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 11927 transitions. Word has length 15 [2022-11-16 12:50:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:01,625 INFO L495 AbstractCegarLoop]: Abstraction has 3031 states and 11927 transitions. [2022-11-16 12:50:01,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 11927 transitions. [2022-11-16 12:50:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:50:01,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:01,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:01,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-16 12:50:01,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:01,831 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash -739244853, now seen corresponding path program 1 times [2022-11-16 12:50:01,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:01,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802486513] [2022-11-16 12:50:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:01,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:01,832 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:01,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 12:50:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:50:02,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:02,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:02,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:02,428 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:02,429 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:02,439 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 22 treesize of output 20 [2022-11-16 12:50:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:02,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:02,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:02,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:02,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802486513] [2022-11-16 12:50:02,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802486513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:02,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:02,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:02,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50553267] [2022-11-16 12:50:02,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:02,709 INFO L87 Difference]: Start difference. First operand 3031 states and 11927 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:02,917 INFO L93 Difference]: Finished difference Result 3035 states and 11941 transitions. [2022-11-16 12:50:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:50:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:02,926 INFO L225 Difference]: With dead ends: 3035 [2022-11-16 12:50:02,927 INFO L226 Difference]: Without dead ends: 3035 [2022-11-16 12:50:02,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:02,927 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:02,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:50:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2022-11-16 12:50:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3031. [2022-11-16 12:50:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3024 states have (on average 3.945436507936508) internal successors, (11931), 3030 states have internal predecessors, (11931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 11931 transitions. [2022-11-16 12:50:02,999 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 11931 transitions. Word has length 15 [2022-11-16 12:50:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:02,999 INFO L495 AbstractCegarLoop]: Abstraction has 3031 states and 11931 transitions. [2022-11-16 12:50:02,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 11931 transitions. [2022-11-16 12:50:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:50:03,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:03,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:03,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:03,202 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1130285351, now seen corresponding path program 1 times [2022-11-16 12:50:03,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693064153] [2022-11-16 12:50:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:03,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:03,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:03,203 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:03,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 12:50:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:50:03,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:03,866 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:03,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:03,899 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 266 treesize of output 262 [2022-11-16 12:50:04,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:04,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:04,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:04,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:04,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693064153] [2022-11-16 12:50:04,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693064153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:04,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:04,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:04,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803074055] [2022-11-16 12:50:04,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:04,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:04,234 INFO L87 Difference]: Start difference. First operand 3031 states and 11931 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:04,421 INFO L93 Difference]: Finished difference Result 3019 states and 11873 transitions. [2022-11-16 12:50:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:04,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:50:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:04,429 INFO L225 Difference]: With dead ends: 3019 [2022-11-16 12:50:04,430 INFO L226 Difference]: Without dead ends: 3019 [2022-11-16 12:50:04,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:04,430 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:04,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:50:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2022-11-16 12:50:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3005. [2022-11-16 12:50:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 2998 states have (on average 3.944296197464977) internal successors, (11825), 3004 states have internal predecessors, (11825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 11825 transitions. [2022-11-16 12:50:04,480 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 11825 transitions. Word has length 15 [2022-11-16 12:50:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:04,480 INFO L495 AbstractCegarLoop]: Abstraction has 3005 states and 11825 transitions. [2022-11-16 12:50:04,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 11825 transitions. [2022-11-16 12:50:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:50:04,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:04,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:04,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-16 12:50:04,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:04,682 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1133486597, now seen corresponding path program 1 times [2022-11-16 12:50:04,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:04,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807922364] [2022-11-16 12:50:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:04,682 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 [2022-11-16 12:50:04,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:04,683 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:04,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 12:50:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:50:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:05,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:05,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:05,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807922364] [2022-11-16 12:50:05,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807922364] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:50:05,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:50:05,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2022-11-16 12:50:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909148507] [2022-11-16 12:50:05,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:50:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:50:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:50:05,506 INFO L87 Difference]: Start difference. First operand 3005 states and 11825 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:06,431 INFO L93 Difference]: Finished difference Result 5491 states and 22107 transitions. [2022-11-16 12:50:06,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:50:06,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:50:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:06,445 INFO L225 Difference]: With dead ends: 5491 [2022-11-16 12:50:06,445 INFO L226 Difference]: Without dead ends: 5491 [2022-11-16 12:50:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:50:06,445 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 24 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:50:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5491 states. [2022-11-16 12:50:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5491 to 3441. [2022-11-16 12:50:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3441 states, 3434 states have (on average 3.9711706464764123) internal successors, (13637), 3440 states have internal predecessors, (13637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3441 states to 3441 states and 13637 transitions. [2022-11-16 12:50:06,521 INFO L78 Accepts]: Start accepts. Automaton has 3441 states and 13637 transitions. Word has length 15 [2022-11-16 12:50:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:06,521 INFO L495 AbstractCegarLoop]: Abstraction has 3441 states and 13637 transitions. [2022-11-16 12:50:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states and 13637 transitions. [2022-11-16 12:50:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:50:06,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:06,522 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:06,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-16 12:50:06,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:06,723 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash -867348905, now seen corresponding path program 1 times [2022-11-16 12:50:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:06,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091682858] [2022-11-16 12:50:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:06,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:06,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:06,724 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:06,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 12:50:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:50:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:07,365 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:07,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:07,394 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 3970 treesize of output 3906 [2022-11-16 12:50:07,572 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:07,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:08,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:09,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:09,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091682858] [2022-11-16 12:50:09,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091682858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:09,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:09,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:50:09,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803131315] [2022-11-16 12:50:09,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:09,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:50:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:50:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:50:09,274 INFO L87 Difference]: Start difference. First operand 3441 states and 13637 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:10,868 INFO L93 Difference]: Finished difference Result 3931 states and 15679 transitions. [2022-11-16 12:50:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:50:10,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 12:50:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:10,879 INFO L225 Difference]: With dead ends: 3931 [2022-11-16 12:50:10,879 INFO L226 Difference]: Without dead ends: 3931 [2022-11-16 12:50:10,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:50:10,879 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:10,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 94 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 93 Unchecked, 1.0s Time] [2022-11-16 12:50:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-16 12:50:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3451. [2022-11-16 12:50:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3444 states have (on average 3.9729965156794425) internal successors, (13683), 3450 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 13683 transitions. [2022-11-16 12:50:10,952 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 13683 transitions. Word has length 15 [2022-11-16 12:50:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:10,953 INFO L495 AbstractCegarLoop]: Abstraction has 3451 states and 13683 transitions. [2022-11-16 12:50:10,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 13683 transitions. [2022-11-16 12:50:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:10,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:10,955 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:10,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-16 12:50:11,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:11,155 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash 289070108, now seen corresponding path program 2 times [2022-11-16 12:50:11,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:11,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937186972] [2022-11-16 12:50:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:50:11,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:11,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:11,157 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:11,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 12:50:11,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:50:11,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:11,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:50:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:11,667 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:11,668 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:11,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 12:50:11,741 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:11,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:50:12,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:12,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:12,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937186972] [2022-11-16 12:50:12,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937186972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:12,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:12,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:50:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810516296] [2022-11-16 12:50:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:12,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:50:12,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:12,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:50:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:12,226 INFO L87 Difference]: Start difference. First operand 3451 states and 13683 transitions. Second operand has 6 states, 5 states have (on average 2.4) 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) [2022-11-16 12:50:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:12,635 INFO L93 Difference]: Finished difference Result 6001 states and 24208 transitions. [2022-11-16 12:50:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:12,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) 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 16 [2022-11-16 12:50:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:12,652 INFO L225 Difference]: With dead ends: 6001 [2022-11-16 12:50:12,652 INFO L226 Difference]: Without dead ends: 6001 [2022-11-16 12:50:12,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:50:12,653 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:12,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-11-16 12:50:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2022-11-16 12:50:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 3508. [2022-11-16 12:50:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3508 states, 3501 states have (on average 3.9785775492716366) internal successors, (13929), 3507 states have internal predecessors, (13929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3508 states to 3508 states and 13929 transitions. [2022-11-16 12:50:12,762 INFO L78 Accepts]: Start accepts. Automaton has 3508 states and 13929 transitions. Word has length 16 [2022-11-16 12:50:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:12,762 INFO L495 AbstractCegarLoop]: Abstraction has 3508 states and 13929 transitions. [2022-11-16 12:50:12,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) 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) [2022-11-16 12:50:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3508 states and 13929 transitions. [2022-11-16 12:50:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:12,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:12,764 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:12,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-16 12:50:12,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:12,965 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash 288984455, now seen corresponding path program 2 times [2022-11-16 12:50:12,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:12,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035132476] [2022-11-16 12:50:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:50:12,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:12,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:12,967 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:12,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 12:50:13,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:50:13,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:50:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:13,564 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:13,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:13,593 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 374 treesize of output 366 [2022-11-16 12:50:13,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:13,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:50:13,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:13,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:13,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035132476] [2022-11-16 12:50:13,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035132476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:13,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:13,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108703204] [2022-11-16 12:50:13,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:13,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:13,953 INFO L87 Difference]: Start difference. First operand 3508 states and 13929 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:14,137 INFO L93 Difference]: Finished difference Result 3548 states and 14027 transitions. [2022-11-16 12:50:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:14,138 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 16 [2022-11-16 12:50:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:14,146 INFO L225 Difference]: With dead ends: 3548 [2022-11-16 12:50:14,146 INFO L226 Difference]: Without dead ends: 3540 [2022-11-16 12:50:14,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:14,147 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:14,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:50:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2022-11-16 12:50:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 3508. [2022-11-16 12:50:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3508 states, 3501 states have (on average 3.9762924878606114) internal successors, (13921), 3507 states have internal predecessors, (13921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3508 states to 3508 states and 13921 transitions. [2022-11-16 12:50:14,212 INFO L78 Accepts]: Start accepts. Automaton has 3508 states and 13921 transitions. Word has length 16 [2022-11-16 12:50:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:14,212 INFO L495 AbstractCegarLoop]: Abstraction has 3508 states and 13921 transitions. [2022-11-16 12:50:14,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3508 states and 13921 transitions. [2022-11-16 12:50:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:14,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:14,214 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:14,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:50:14,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:14,415 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash 285466358, now seen corresponding path program 3 times [2022-11-16 12:50:14,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:14,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551730989] [2022-11-16 12:50:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:50:14,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:14,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:14,416 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:14,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-16 12:50:14,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:50:14,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:14,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:50:14,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:14,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:14,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:14,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:14,915 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:14,916 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:14,926 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 22 treesize of output 20 [2022-11-16 12:50:14,986 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:14,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:50:15,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:15,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:15,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551730989] [2022-11-16 12:50:15,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551730989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:15,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:15,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:50:15,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081620895] [2022-11-16 12:50:15,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:15,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:50:15,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:15,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:50:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:50:15,441 INFO L87 Difference]: Start difference. First operand 3508 states and 13921 transitions. Second operand has 6 states, 5 states have (on average 2.4) 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) [2022-11-16 12:50:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:15,897 INFO L93 Difference]: Finished difference Result 5966 states and 24121 transitions. [2022-11-16 12:50:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) 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 16 [2022-11-16 12:50:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:15,913 INFO L225 Difference]: With dead ends: 5966 [2022-11-16 12:50:15,913 INFO L226 Difference]: Without dead ends: 5966 [2022-11-16 12:50:15,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:50:15,914 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:15,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 38 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 117 Unchecked, 0.4s Time] [2022-11-16 12:50:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5966 states. [2022-11-16 12:50:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5966 to 3515. [2022-11-16 12:50:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 3508 states have (on average 3.9740592930444696) internal successors, (13941), 3514 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 13941 transitions. [2022-11-16 12:50:15,992 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 13941 transitions. Word has length 16 [2022-11-16 12:50:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:15,992 INFO L495 AbstractCegarLoop]: Abstraction has 3515 states and 13941 transitions. [2022-11-16 12:50:15,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) 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) [2022-11-16 12:50:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 13941 transitions. [2022-11-16 12:50:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:15,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:15,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:16,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-16 12:50:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:16,194 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1445153118, now seen corresponding path program 1 times [2022-11-16 12:50:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:16,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262980114] [2022-11-16 12:50:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:16,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:16,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:16,197 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:16,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 12:50:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:16,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:50:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:16,768 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:16,768 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:16,779 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 22 treesize of output 20 [2022-11-16 12:50:16,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:16,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:17,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:17,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262980114] [2022-11-16 12:50:17,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262980114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:17,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:17,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249434637] [2022-11-16 12:50:17,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:17,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:17,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:17,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:17,100 INFO L87 Difference]: Start difference. First operand 3515 states and 13941 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:17,312 INFO L93 Difference]: Finished difference Result 3535 states and 14005 transitions. [2022-11-16 12:50:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:50:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:17,323 INFO L225 Difference]: With dead ends: 3535 [2022-11-16 12:50:17,323 INFO L226 Difference]: Without dead ends: 3535 [2022-11-16 12:50:17,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:17,324 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:17,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:50:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2022-11-16 12:50:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 3535. [2022-11-16 12:50:17,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3528 states have (on average 3.9696712018140587) internal successors, (14005), 3534 states have internal predecessors, (14005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 14005 transitions. [2022-11-16 12:50:17,407 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 14005 transitions. Word has length 16 [2022-11-16 12:50:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:17,407 INFO L495 AbstractCegarLoop]: Abstraction has 3535 states and 14005 transitions. [2022-11-16 12:50:17,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 14005 transitions. [2022-11-16 12:50:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:17,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:17,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:17,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-16 12:50:17,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:17,610 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1441753999, now seen corresponding path program 1 times [2022-11-16 12:50:17,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:17,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557029754] [2022-11-16 12:50:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:17,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:17,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:17,612 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:17,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 12:50:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:18,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:50:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:18,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:18,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:18,235 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:18,235 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:18,247 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 22 treesize of output 20 [2022-11-16 12:50:18,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:18,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:50:18,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:18,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:18,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557029754] [2022-11-16 12:50:18,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557029754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:18,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:18,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318841614] [2022-11-16 12:50:18,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:18,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:18,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:18,563 INFO L87 Difference]: Start difference. First operand 3535 states and 14005 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:18,768 INFO L93 Difference]: Finished difference Result 3536 states and 14006 transitions. [2022-11-16 12:50:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:18,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:50:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:18,778 INFO L225 Difference]: With dead ends: 3536 [2022-11-16 12:50:18,778 INFO L226 Difference]: Without dead ends: 3536 [2022-11-16 12:50:18,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:18,779 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:18,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 12:50:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2022-11-16 12:50:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 3536. [2022-11-16 12:50:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 3529 states have (on average 3.9688296967979597) internal successors, (14006), 3535 states have internal predecessors, (14006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 14006 transitions. [2022-11-16 12:50:18,847 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 14006 transitions. Word has length 16 [2022-11-16 12:50:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:18,847 INFO L495 AbstractCegarLoop]: Abstraction has 3536 states and 14006 transitions. [2022-11-16 12:50:18,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 14006 transitions. [2022-11-16 12:50:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:18,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:18,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:18,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:50:19,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:19,050 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:19,050 INFO L85 PathProgramCache]: Analyzing trace with hash 679107477, now seen corresponding path program 1 times [2022-11-16 12:50:19,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:19,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598620877] [2022-11-16 12:50:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:19,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:19,051 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:19,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-16 12:50:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:50:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:19,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:19,795 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:19,795 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:19,805 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 22 treesize of output 20 [2022-11-16 12:50:19,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:19,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:50:20,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:20,071 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598620877] [2022-11-16 12:50:20,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598620877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:20,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:20,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102668390] [2022-11-16 12:50:20,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:20,072 INFO L87 Difference]: Start difference. First operand 3536 states and 14006 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:20,266 INFO L93 Difference]: Finished difference Result 3528 states and 13980 transitions. [2022-11-16 12:50:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:50:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:20,276 INFO L225 Difference]: With dead ends: 3528 [2022-11-16 12:50:20,276 INFO L226 Difference]: Without dead ends: 3528 [2022-11-16 12:50:20,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:20,276 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:20,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:50:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-11-16 12:50:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3528. [2022-11-16 12:50:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3521 states have (on average 3.97046293666572) internal successors, (13980), 3527 states have internal predecessors, (13980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 13980 transitions. [2022-11-16 12:50:20,368 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 13980 transitions. Word has length 16 [2022-11-16 12:50:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:20,368 INFO L495 AbstractCegarLoop]: Abstraction has 3528 states and 13980 transitions. [2022-11-16 12:50:20,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 13980 transitions. [2022-11-16 12:50:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:20,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:20,371 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:20,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:20,584 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1031290185, now seen corresponding path program 1 times [2022-11-16 12:50:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:20,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580192936] [2022-11-16 12:50:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:20,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:20,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:20,586 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:20,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 12:50:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:21,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:50:21,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:21,247 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:21,248 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:21,257 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 22 treesize of output 20 [2022-11-16 12:50:21,320 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:21,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:22,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:23,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:23,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580192936] [2022-11-16 12:50:23,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580192936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:23,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:23,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:50:23,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678834667] [2022-11-16 12:50:23,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:23,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:50:23,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:50:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:50:23,028 INFO L87 Difference]: Start difference. First operand 3528 states and 13980 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:24,874 INFO L93 Difference]: Finished difference Result 6020 states and 24131 transitions. [2022-11-16 12:50:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:50:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:50:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:24,890 INFO L225 Difference]: With dead ends: 6020 [2022-11-16 12:50:24,891 INFO L226 Difference]: Without dead ends: 6020 [2022-11-16 12:50:24,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:50:24,891 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 273 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:24,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 111 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 285 Invalid, 0 Unknown, 252 Unchecked, 1.3s Time] [2022-11-16 12:50:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6020 states. [2022-11-16 12:50:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6020 to 3536. [2022-11-16 12:50:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 3529 states have (on average 3.9688296967979597) internal successors, (14006), 3535 states have internal predecessors, (14006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 14006 transitions. [2022-11-16 12:50:24,966 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 14006 transitions. Word has length 16 [2022-11-16 12:50:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:24,966 INFO L495 AbstractCegarLoop]: Abstraction has 3536 states and 14006 transitions. [2022-11-16 12:50:24,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 14006 transitions. [2022-11-16 12:50:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:24,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:24,968 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:24,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:50:25,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:25,169 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:25,169 INFO L85 PathProgramCache]: Analyzing trace with hash 899783442, now seen corresponding path program 1 times [2022-11-16 12:50:25,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:25,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774588842] [2022-11-16 12:50:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:25,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:25,170 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:25,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-16 12:50:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:25,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:50:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:25,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:25,779 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:25,779 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:25,788 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 22 treesize of output 20 [2022-11-16 12:50:25,850 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:25,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:26,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:27,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:27,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774588842] [2022-11-16 12:50:27,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774588842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:27,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:27,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:50:27,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560771694] [2022-11-16 12:50:27,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:27,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:50:27,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:27,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:50:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:50:27,480 INFO L87 Difference]: Start difference. First operand 3536 states and 14006 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:29,409 INFO L93 Difference]: Finished difference Result 6093 states and 24383 transitions. [2022-11-16 12:50:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:50:29,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:50:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:29,433 INFO L225 Difference]: With dead ends: 6093 [2022-11-16 12:50:29,434 INFO L226 Difference]: Without dead ends: 6093 [2022-11-16 12:50:29,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:50:29,434 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:29,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 107 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 259 Invalid, 0 Unknown, 121 Unchecked, 1.3s Time] [2022-11-16 12:50:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6093 states. [2022-11-16 12:50:29,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6093 to 3558. [2022-11-16 12:50:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3551 states have (on average 3.9622641509433962) internal successors, (14070), 3557 states have internal predecessors, (14070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 14070 transitions. [2022-11-16 12:50:29,532 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 14070 transitions. Word has length 16 [2022-11-16 12:50:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:29,532 INFO L495 AbstractCegarLoop]: Abstraction has 3558 states and 14070 transitions. [2022-11-16 12:50:29,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 14070 transitions. [2022-11-16 12:50:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:29,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:29,534 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:29,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:29,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:29,734 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:29,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1118122024, now seen corresponding path program 1 times [2022-11-16 12:50:29,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:29,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231594367] [2022-11-16 12:50:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:29,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:29,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:29,736 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:29,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 12:50:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:30,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:50:30,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:30,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:30,480 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:30,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:30,505 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 266 treesize of output 262 [2022-11-16 12:50:30,623 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:30,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:31,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:32,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231594367] [2022-11-16 12:50:32,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231594367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:32,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:32,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:50:32,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513241740] [2022-11-16 12:50:32,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:32,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:50:32,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:50:32,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:50:32,420 INFO L87 Difference]: Start difference. First operand 3558 states and 14070 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:34,364 INFO L93 Difference]: Finished difference Result 5920 states and 23723 transitions. [2022-11-16 12:50:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:50:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:50:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:34,381 INFO L225 Difference]: With dead ends: 5920 [2022-11-16 12:50:34,382 INFO L226 Difference]: Without dead ends: 5920 [2022-11-16 12:50:34,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:50:34,382 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 391 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:34,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 108 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 280 Invalid, 0 Unknown, 241 Unchecked, 1.3s Time] [2022-11-16 12:50:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2022-11-16 12:50:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 3562. [2022-11-16 12:50:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3555 states have (on average 3.9628691983122364) internal successors, (14088), 3561 states have internal predecessors, (14088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 14088 transitions. [2022-11-16 12:50:34,461 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 14088 transitions. Word has length 16 [2022-11-16 12:50:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:34,461 INFO L495 AbstractCegarLoop]: Abstraction has 3562 states and 14088 transitions. [2022-11-16 12:50:34,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 14088 transitions. [2022-11-16 12:50:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 12:50:34,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:34,464 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:34,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:50:34,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:34,667 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1118012315, now seen corresponding path program 1 times [2022-11-16 12:50:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:34,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139482570] [2022-11-16 12:50:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:34,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:34,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:34,669 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:34,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-16 12:50:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:35,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:50:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:35,372 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:35,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:35,398 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 1014 treesize of output 998 [2022-11-16 12:50:35,531 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:35,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:50:36,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:50:37,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:37,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139482570] [2022-11-16 12:50:37,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139482570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:37,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:37,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:50:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154836316] [2022-11-16 12:50:37,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:37,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:50:37,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:37,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:50:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:50:37,305 INFO L87 Difference]: Start difference. First operand 3562 states and 14088 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:39,155 INFO L93 Difference]: Finished difference Result 5930 states and 23749 transitions. [2022-11-16 12:50:39,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:50:39,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 12:50:39,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:39,172 INFO L225 Difference]: With dead ends: 5930 [2022-11-16 12:50:39,172 INFO L226 Difference]: Without dead ends: 5930 [2022-11-16 12:50:39,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:50:39,172 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 330 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:39,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 99 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 279 Invalid, 0 Unknown, 207 Unchecked, 1.3s Time] [2022-11-16 12:50:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2022-11-16 12:50:39,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 3572. [2022-11-16 12:50:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 3565 states have (on average 3.959046283309958) internal successors, (14114), 3571 states have internal predecessors, (14114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 14114 transitions. [2022-11-16 12:50:39,252 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 14114 transitions. Word has length 16 [2022-11-16 12:50:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:39,253 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 14114 transitions. [2022-11-16 12:50:39,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 14114 transitions. [2022-11-16 12:50:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:50:39,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:39,255 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:39,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:39,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:39,455 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:39,456 INFO L85 PathProgramCache]: Analyzing trace with hash 371235217, now seen corresponding path program 2 times [2022-11-16 12:50:39,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:39,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578281718] [2022-11-16 12:50:39,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:50:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:39,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:39,457 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:39,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-16 12:50:39,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:50:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:50:39,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:40,056 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:40,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:40,087 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 266 treesize of output 262 [2022-11-16 12:50:40,208 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:40,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:50:40,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:40,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:40,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578281718] [2022-11-16 12:50:40,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578281718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:40,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:40,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:50:40,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697038452] [2022-11-16 12:50:40,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:40,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:50:40,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:50:40,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:40,670 INFO L87 Difference]: Start difference. First operand 3572 states and 14114 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:40,798 INFO L93 Difference]: Finished difference Result 3634 states and 14337 transitions. [2022-11-16 12:50:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:40,798 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 17 [2022-11-16 12:50:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:40,807 INFO L225 Difference]: With dead ends: 3634 [2022-11-16 12:50:40,807 INFO L226 Difference]: Without dead ends: 3634 [2022-11-16 12:50:40,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:40,808 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:40,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-11-16 12:50:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2022-11-16 12:50:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 3596. [2022-11-16 12:50:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 3589 states have (on average 3.954304820284202) internal successors, (14192), 3595 states have internal predecessors, (14192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 14192 transitions. [2022-11-16 12:50:40,868 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 14192 transitions. Word has length 17 [2022-11-16 12:50:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:40,868 INFO L495 AbstractCegarLoop]: Abstraction has 3596 states and 14192 transitions. [2022-11-16 12:50:40,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 14192 transitions. [2022-11-16 12:50:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:50:40,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:40,870 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:40,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:50:41,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:41,071 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash 368496367, now seen corresponding path program 3 times [2022-11-16 12:50:41,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:41,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278786609] [2022-11-16 12:50:41,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:50:41,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:41,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:41,072 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:41,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-16 12:50:41,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:50:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:50:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:41,615 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:41,616 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:41,627 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 22 treesize of output 20 [2022-11-16 12:50:41,681 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:41,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:50:42,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:42,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:42,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278786609] [2022-11-16 12:50:42,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278786609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:42,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:42,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:50:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403243336] [2022-11-16 12:50:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:42,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:50:42,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:50:42,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:42,141 INFO L87 Difference]: Start difference. First operand 3596 states and 14192 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:42,261 INFO L93 Difference]: Finished difference Result 3654 states and 14407 transitions. [2022-11-16 12:50:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:42,261 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 17 [2022-11-16 12:50:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:42,270 INFO L225 Difference]: With dead ends: 3654 [2022-11-16 12:50:42,271 INFO L226 Difference]: Without dead ends: 3654 [2022-11-16 12:50:42,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:42,271 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:42,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-11-16 12:50:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2022-11-16 12:50:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 3596. [2022-11-16 12:50:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3596 states, 3589 states have (on average 3.954304820284202) internal successors, (14192), 3595 states have internal predecessors, (14192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 14192 transitions. [2022-11-16 12:50:42,333 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 14192 transitions. Word has length 17 [2022-11-16 12:50:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:42,333 INFO L495 AbstractCegarLoop]: Abstraction has 3596 states and 14192 transitions. [2022-11-16 12:50:42,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 14192 transitions. [2022-11-16 12:50:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:50:42,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:42,335 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:42,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:42,536 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 259518967, now seen corresponding path program 4 times [2022-11-16 12:50:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:42,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140537043] [2022-11-16 12:50:42,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:50:42,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:42,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:42,538 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:42,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 12:50:42,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:50:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:50:42,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:50:42,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:43,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:43,225 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:43,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:43,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6886 treesize of output 6758 [2022-11-16 12:50:43,495 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:43,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:44,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:50:46,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:46,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140537043] [2022-11-16 12:50:46,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140537043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:46,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:50:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574688667] [2022-11-16 12:50:46,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:50:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:50:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:50:46,342 INFO L87 Difference]: Start difference. First operand 3596 states and 14192 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:51,994 INFO L93 Difference]: Finished difference Result 6720 states and 26652 transitions. [2022-11-16 12:50:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:50:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:50:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:52,013 INFO L225 Difference]: With dead ends: 6720 [2022-11-16 12:50:52,013 INFO L226 Difference]: Without dead ends: 6720 [2022-11-16 12:50:52,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:50:52,013 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 248 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:52,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 217 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 520 Invalid, 0 Unknown, 226 Unchecked, 2.6s Time] [2022-11-16 12:50:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6720 states. [2022-11-16 12:50:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6720 to 3670. [2022-11-16 12:50:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3663 states have (on average 3.9333879333879334) internal successors, (14408), 3669 states have internal predecessors, (14408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 14408 transitions. [2022-11-16 12:50:52,096 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 14408 transitions. Word has length 17 [2022-11-16 12:50:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:52,096 INFO L495 AbstractCegarLoop]: Abstraction has 3670 states and 14408 transitions. [2022-11-16 12:50:52,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 14408 transitions. [2022-11-16 12:50:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:50:52,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:52,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:52,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-16 12:50:52,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:52,299 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:52,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:52,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1850167013, now seen corresponding path program 1 times [2022-11-16 12:50:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:52,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487364902] [2022-11-16 12:50:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:52,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:52,301 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:52,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-16 12:50:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:50:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:52,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:52,932 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:52,933 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:52,943 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 22 treesize of output 20 [2022-11-16 12:50:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:53,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:53,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:53,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:53,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487364902] [2022-11-16 12:50:53,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487364902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:53,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:53,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:53,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975432721] [2022-11-16 12:50:53,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:53,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:53,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:53,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:53,229 INFO L87 Difference]: Start difference. First operand 3670 states and 14408 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:53,425 INFO L93 Difference]: Finished difference Result 3670 states and 14400 transitions. [2022-11-16 12:50:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:50:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:53,434 INFO L225 Difference]: With dead ends: 3670 [2022-11-16 12:50:53,435 INFO L226 Difference]: Without dead ends: 3670 [2022-11-16 12:50:53,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:53,435 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:53,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:50:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-11-16 12:50:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3650. [2022-11-16 12:50:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 3643 states have (on average 3.9352182267362066) internal successors, (14336), 3649 states have internal predecessors, (14336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 14336 transitions. [2022-11-16 12:50:53,500 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 14336 transitions. Word has length 17 [2022-11-16 12:50:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:53,500 INFO L495 AbstractCegarLoop]: Abstraction has 3650 states and 14336 transitions. [2022-11-16 12:50:53,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 14336 transitions. [2022-11-16 12:50:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:50:53,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:53,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:53,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:50:53,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:53,703 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash -422698882, now seen corresponding path program 1 times [2022-11-16 12:50:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:53,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141646518] [2022-11-16 12:50:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:53,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:53,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:53,705 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:53,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 12:50:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:50:54,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:54,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:54,410 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:54,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:54,438 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 502 treesize of output 494 [2022-11-16 12:50:54,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:54,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:50:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:50:54,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:50:54,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:54,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141646518] [2022-11-16 12:50:54,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141646518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:50:54,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:50:54,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:50:54,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315153659] [2022-11-16 12:50:54,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:50:54,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:50:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:50:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:50:54,764 INFO L87 Difference]: Start difference. First operand 3650 states and 14336 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:54,954 INFO L93 Difference]: Finished difference Result 3646 states and 14322 transitions. [2022-11-16 12:50:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:50:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:50:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:54,964 INFO L225 Difference]: With dead ends: 3646 [2022-11-16 12:50:54,964 INFO L226 Difference]: Without dead ends: 3646 [2022-11-16 12:50:54,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:50:54,964 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:54,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:50:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2022-11-16 12:50:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3646. [2022-11-16 12:50:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3639 states have (on average 3.935696619950536) internal successors, (14322), 3645 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 14322 transitions. [2022-11-16 12:50:55,023 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 14322 transitions. Word has length 17 [2022-11-16 12:50:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:55,023 INFO L495 AbstractCegarLoop]: Abstraction has 3646 states and 14322 transitions. [2022-11-16 12:50:55,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 14322 transitions. [2022-11-16 12:50:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:50:55,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:55,026 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:55,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:55,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:55,226 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1905221558, now seen corresponding path program 1 times [2022-11-16 12:50:55,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:55,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983247334] [2022-11-16 12:50:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:55,228 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:55,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-16 12:50:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:55,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:50:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:55,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:55,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:55,873 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:50:55,873 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:50:55,882 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 22 treesize of output 20 [2022-11-16 12:50:55,950 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:55,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:50:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:56,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:50:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:50:57,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:50:57,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983247334] [2022-11-16 12:50:57,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983247334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:50:57,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:50:57,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:50:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861788756] [2022-11-16 12:50:57,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:50:57,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:50:57,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:50:57,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:50:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:50:57,698 INFO L87 Difference]: Start difference. First operand 3646 states and 14322 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:50:58,695 INFO L93 Difference]: Finished difference Result 6572 states and 26495 transitions. [2022-11-16 12:50:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:50:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:50:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:50:58,715 INFO L225 Difference]: With dead ends: 6572 [2022-11-16 12:50:58,715 INFO L226 Difference]: Without dead ends: 6572 [2022-11-16 12:50:58,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:50:58,715 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 142 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:50:58,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 86 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 119 Invalid, 0 Unknown, 184 Unchecked, 0.6s Time] [2022-11-16 12:50:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2022-11-16 12:50:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 3667. [2022-11-16 12:50:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3660 states have (on average 3.944262295081967) internal successors, (14436), 3666 states have internal predecessors, (14436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 14436 transitions. [2022-11-16 12:50:58,802 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 14436 transitions. Word has length 17 [2022-11-16 12:50:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:50:58,802 INFO L495 AbstractCegarLoop]: Abstraction has 3667 states and 14436 transitions. [2022-11-16 12:50:58,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:50:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 14436 transitions. [2022-11-16 12:50:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:50:58,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:50:58,805 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:50:58,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-16 12:50:59,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:59,005 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:50:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:50:59,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1905221124, now seen corresponding path program 1 times [2022-11-16 12:50:59,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:50:59,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75475200] [2022-11-16 12:50:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:50:59,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:50:59,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:50:59,007 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:50:59,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-16 12:50:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:50:59,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:50:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:50:59,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:50:59,749 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:50:59,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:50:59,776 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 994 treesize of output 978 [2022-11-16 12:50:59,924 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:50:59,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:51:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:51:00,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:51:01,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75475200] [2022-11-16 12:51:01,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75475200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:01,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:01,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:51:01,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984100382] [2022-11-16 12:51:01,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:01,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:51:01,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:51:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:51:01,679 INFO L87 Difference]: Start difference. First operand 3667 states and 14436 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:03,609 INFO L93 Difference]: Finished difference Result 6179 states and 24641 transitions. [2022-11-16 12:51:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:51:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:51:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:03,628 INFO L225 Difference]: With dead ends: 6179 [2022-11-16 12:51:03,628 INFO L226 Difference]: Without dead ends: 6179 [2022-11-16 12:51:03,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:51:03,628 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:03,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 114 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 301 Invalid, 0 Unknown, 248 Unchecked, 1.3s Time] [2022-11-16 12:51:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6179 states. [2022-11-16 12:51:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6179 to 3689. [2022-11-16 12:51:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3682 states have (on average 3.9429657794676807) internal successors, (14518), 3688 states have internal predecessors, (14518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 14518 transitions. [2022-11-16 12:51:03,707 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 14518 transitions. Word has length 17 [2022-11-16 12:51:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:03,708 INFO L495 AbstractCegarLoop]: Abstraction has 3689 states and 14518 transitions. [2022-11-16 12:51:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 14518 transitions. [2022-11-16 12:51:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:51:03,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:03,710 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:03,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:03,910 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1681536985, now seen corresponding path program 2 times [2022-11-16 12:51:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:03,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316560484] [2022-11-16 12:51:03,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:51:03,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:03,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:03,912 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:03,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:51:04,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:51:04,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:51:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:51:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:04,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:04,551 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:51:04,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:51:04,580 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 758 treesize of output 742 [2022-11-16 12:51:04,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:04,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:51:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:51:04,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:51:04,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316560484] [2022-11-16 12:51:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316560484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:04,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:04,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021703132] [2022-11-16 12:51:04,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:04,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:51:04,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:04,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:51:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:51:04,949 INFO L87 Difference]: Start difference. First operand 3689 states and 14518 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:05,122 INFO L93 Difference]: Finished difference Result 3727 states and 14656 transitions. [2022-11-16 12:51:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:51:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:51:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:05,132 INFO L225 Difference]: With dead ends: 3727 [2022-11-16 12:51:05,132 INFO L226 Difference]: Without dead ends: 3727 [2022-11-16 12:51:05,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:51:05,132 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:05,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:51:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2022-11-16 12:51:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3699. [2022-11-16 12:51:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3692 states have (on average 3.9420368364030334) internal successors, (14554), 3698 states have internal predecessors, (14554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 14554 transitions. [2022-11-16 12:51:05,196 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 14554 transitions. Word has length 17 [2022-11-16 12:51:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:05,196 INFO L495 AbstractCegarLoop]: Abstraction has 3699 states and 14554 transitions. [2022-11-16 12:51:05,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 14554 transitions. [2022-11-16 12:51:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:51:05,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:05,198 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:05,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 12:51:05,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:05,399 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1376610259, now seen corresponding path program 2 times [2022-11-16 12:51:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763661840] [2022-11-16 12:51:05,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:51:05,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:05,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:05,400 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:05,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:51:05,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:51:05,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:51:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:51:05,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:06,023 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:51:06,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:51:06,055 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 266 treesize of output 262 [2022-11-16 12:51:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:06,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:51:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:51:06,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:51:06,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:06,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763661840] [2022-11-16 12:51:06,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763661840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:06,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:06,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:06,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479462830] [2022-11-16 12:51:06,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:51:06,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:51:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:51:06,450 INFO L87 Difference]: Start difference. First operand 3699 states and 14554 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:06,640 INFO L93 Difference]: Finished difference Result 3675 states and 14476 transitions. [2022-11-16 12:51:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:51:06,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:51:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:06,650 INFO L225 Difference]: With dead ends: 3675 [2022-11-16 12:51:06,650 INFO L226 Difference]: Without dead ends: 3573 [2022-11-16 12:51:06,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:51:06,650 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:06,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:51:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2022-11-16 12:51:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3508. [2022-11-16 12:51:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3508 states, 3502 states have (on average 4.000856653340948) internal successors, (14011), 3507 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3508 states to 3508 states and 14011 transitions. [2022-11-16 12:51:06,710 INFO L78 Accepts]: Start accepts. Automaton has 3508 states and 14011 transitions. Word has length 18 [2022-11-16 12:51:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:06,710 INFO L495 AbstractCegarLoop]: Abstraction has 3508 states and 14011 transitions. [2022-11-16 12:51:06,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3508 states and 14011 transitions. [2022-11-16 12:51:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:51:06,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:06,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:06,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:06,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:06,913 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:06,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1520602591, now seen corresponding path program 1 times [2022-11-16 12:51:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:06,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824466324] [2022-11-16 12:51:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:06,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:06,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:06,915 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:06,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:51:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:07,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 12:51:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:07,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:07,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:07,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:07,581 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:51:07,581 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:51:07,592 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 22 treesize of output 20 [2022-11-16 12:51:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:07,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:51:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:51:07,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:51:07,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:07,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824466324] [2022-11-16 12:51:07,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824466324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:07,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:07,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:07,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916618672] [2022-11-16 12:51:07,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:07,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:51:07,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:51:07,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:51:07,923 INFO L87 Difference]: Start difference. First operand 3508 states and 14011 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:08,111 INFO L93 Difference]: Finished difference Result 3508 states and 14007 transitions. [2022-11-16 12:51:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:51:08,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:51:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:08,120 INFO L225 Difference]: With dead ends: 3508 [2022-11-16 12:51:08,120 INFO L226 Difference]: Without dead ends: 3508 [2022-11-16 12:51:08,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:51:08,121 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:08,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-16 12:51:08,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2022-11-16 12:51:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3499. [2022-11-16 12:51:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 3493 states have (on average 4.000572573718866) internal successors, (13974), 3498 states have internal predecessors, (13974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 13974 transitions. [2022-11-16 12:51:08,179 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 13974 transitions. Word has length 18 [2022-11-16 12:51:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:08,179 INFO L495 AbstractCegarLoop]: Abstraction has 3499 states and 13974 transitions. [2022-11-16 12:51:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 13974 transitions. [2022-11-16 12:51:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:51:08,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:08,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:08,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:51:08,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:08,382 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1001649997, now seen corresponding path program 1 times [2022-11-16 12:51:08,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:08,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465386642] [2022-11-16 12:51:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:08,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:08,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:08,384 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:08,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-16 12:51:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:51:08,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:51:08,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:51:08,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465386642] [2022-11-16 12:51:08,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465386642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:08,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:08,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143962620] [2022-11-16 12:51:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:51:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:51:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:51:08,768 INFO L87 Difference]: Start difference. First operand 3499 states and 13974 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:08,955 INFO L93 Difference]: Finished difference Result 3355 states and 13326 transitions. [2022-11-16 12:51:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:51:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:51:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:08,964 INFO L225 Difference]: With dead ends: 3355 [2022-11-16 12:51:08,964 INFO L226 Difference]: Without dead ends: 3355 [2022-11-16 12:51:08,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:51:08,964 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:08,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:51:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2022-11-16 12:51:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 3355. [2022-11-16 12:51:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3350 states have (on average 3.977910447761194) internal successors, (13326), 3354 states have internal predecessors, (13326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 13326 transitions. [2022-11-16 12:51:09,020 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 13326 transitions. Word has length 18 [2022-11-16 12:51:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:09,020 INFO L495 AbstractCegarLoop]: Abstraction has 3355 states and 13326 transitions. [2022-11-16 12:51:09,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:09,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 13326 transitions. [2022-11-16 12:51:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:51:09,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:09,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:09,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:09,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:09,223 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash -218763490, now seen corresponding path program 1 times [2022-11-16 12:51:09,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:09,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009400775] [2022-11-16 12:51:09,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:09,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:09,225 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:09,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-16 12:51:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:51:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:09,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:09,934 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:51:09,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:51:09,960 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 266 treesize of output 262 [2022-11-16 12:51:10,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:10,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:51:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:51:10,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:51:10,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:10,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009400775] [2022-11-16 12:51:10,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009400775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:10,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:10,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035701301] [2022-11-16 12:51:10,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:10,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:51:10,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:51:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:51:10,339 INFO L87 Difference]: Start difference. First operand 3355 states and 13326 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:10,524 INFO L93 Difference]: Finished difference Result 3353 states and 13322 transitions. [2022-11-16 12:51:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:51:10,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:51:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:10,533 INFO L225 Difference]: With dead ends: 3353 [2022-11-16 12:51:10,533 INFO L226 Difference]: Without dead ends: 3353 [2022-11-16 12:51:10,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:51:10,533 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:10,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:51:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2022-11-16 12:51:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 3353. [2022-11-16 12:51:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3348 states have (on average 3.9790919952210273) internal successors, (13322), 3352 states have internal predecessors, (13322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 13322 transitions. [2022-11-16 12:51:10,595 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 13322 transitions. Word has length 18 [2022-11-16 12:51:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:10,595 INFO L495 AbstractCegarLoop]: Abstraction has 3353 states and 13322 transitions. [2022-11-16 12:51:10,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 13322 transitions. [2022-11-16 12:51:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:51:10,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:10,598 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:10,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:10,798 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:10,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1067677385, now seen corresponding path program 1 times [2022-11-16 12:51:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:10,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366717240] [2022-11-16 12:51:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:10,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:10,800 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:10,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:51:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:51:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:11,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:11,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:11,470 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:51:11,471 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:51:11,481 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 22 treesize of output 20 [2022-11-16 12:51:11,557 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:51:11,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:51:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:51:12,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:51:13,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366717240] [2022-11-16 12:51:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366717240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:13,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:13,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:51:13,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081022196] [2022-11-16 12:51:13,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:13,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:51:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:51:13,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:51:13,416 INFO L87 Difference]: Start difference. First operand 3353 states and 13322 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:14,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:14,377 INFO L93 Difference]: Finished difference Result 4568 states and 18344 transitions. [2022-11-16 12:51:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:51:14,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:51:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:14,389 INFO L225 Difference]: With dead ends: 4568 [2022-11-16 12:51:14,389 INFO L226 Difference]: Without dead ends: 4568 [2022-11-16 12:51:14,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:51:14,390 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:14,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 87 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-11-16 12:51:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2022-11-16 12:51:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 3353. [2022-11-16 12:51:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3348 states have (on average 3.9847670250896057) internal successors, (13341), 3352 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 13341 transitions. [2022-11-16 12:51:14,457 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 13341 transitions. Word has length 18 [2022-11-16 12:51:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:14,457 INFO L495 AbstractCegarLoop]: Abstraction has 3353 states and 13341 transitions. [2022-11-16 12:51:14,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:14,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 13341 transitions. [2022-11-16 12:51:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:51:14,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:14,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:14,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:14,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:14,661 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1067687398, now seen corresponding path program 1 times [2022-11-16 12:51:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:14,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797278899] [2022-11-16 12:51:14,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:14,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:14,663 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:14,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:51:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:51:15,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:15,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:15,395 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:51:15,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:51:15,419 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 182 treesize of output 178 [2022-11-16 12:51:15,530 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:51:15,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:51:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:51:16,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:51:17,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:17,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797278899] [2022-11-16 12:51:17,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797278899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:17,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:17,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:51:17,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113053494] [2022-11-16 12:51:17,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:51:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:51:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:51:17,311 INFO L87 Difference]: Start difference. First operand 3353 states and 13341 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:18,906 INFO L93 Difference]: Finished difference Result 4677 states and 18579 transitions. [2022-11-16 12:51:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:51:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:51:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:18,919 INFO L225 Difference]: With dead ends: 4677 [2022-11-16 12:51:18,919 INFO L226 Difference]: Without dead ends: 4677 [2022-11-16 12:51:18,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:51:18,919 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 192 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:18,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 109 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 239 Invalid, 0 Unknown, 159 Unchecked, 1.0s Time] [2022-11-16 12:51:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4677 states. [2022-11-16 12:51:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4677 to 3387. [2022-11-16 12:51:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3382 states have (on average 3.977232406859846) internal successors, (13451), 3386 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 13451 transitions. [2022-11-16 12:51:18,985 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 13451 transitions. Word has length 18 [2022-11-16 12:51:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:18,986 INFO L495 AbstractCegarLoop]: Abstraction has 3387 states and 13451 transitions. [2022-11-16 12:51:18,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 13451 transitions. [2022-11-16 12:51:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:51:18,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:18,988 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:18,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:19,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:19,189 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash 588035878, now seen corresponding path program 2 times [2022-11-16 12:51:19,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:19,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536339297] [2022-11-16 12:51:19,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:51:19,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:19,190 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:19,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-16 12:51:19,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:51:19,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:51:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:51:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:19,861 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:51:19,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:51:19,889 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 3494 treesize of output 3430 [2022-11-16 12:51:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:51:20,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:51:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:51:20,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:51:20,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:20,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536339297] [2022-11-16 12:51:20,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536339297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:20,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:20,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:51:20,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111487342] [2022-11-16 12:51:20,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:20,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:51:20,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:51:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:51:20,315 INFO L87 Difference]: Start difference. First operand 3387 states and 13451 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:20,489 INFO L93 Difference]: Finished difference Result 3411 states and 13561 transitions. [2022-11-16 12:51:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:51:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:51:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:51:20,498 INFO L225 Difference]: With dead ends: 3411 [2022-11-16 12:51:20,498 INFO L226 Difference]: Without dead ends: 3411 [2022-11-16 12:51:20,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:51:20,498 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:51:20,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:51:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2022-11-16 12:51:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 3379. [2022-11-16 12:51:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3374 states have (on average 3.978660343805572) internal successors, (13424), 3378 states have internal predecessors, (13424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 13424 transitions. [2022-11-16 12:51:20,554 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 13424 transitions. Word has length 18 [2022-11-16 12:51:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:51:20,554 INFO L495 AbstractCegarLoop]: Abstraction has 3379 states and 13424 transitions. [2022-11-16 12:51:20,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 13424 transitions. [2022-11-16 12:51:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:51:20,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:51:20,557 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1] [2022-11-16 12:51:20,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-11-16 12:51:20,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:20,758 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:51:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash -6918510, now seen corresponding path program 2 times [2022-11-16 12:51:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:51:20,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53995673] [2022-11-16 12:51:20,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:51:20,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:51:20,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:51:20,760 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:51:20,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-16 12:51:21,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:51:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:51:21,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:51:21,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:21,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 12:51:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:22,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:28,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:51:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53995673] [2022-11-16 12:51:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53995673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:28,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:51:28,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-16 12:51:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044167075] [2022-11-16 12:51:28,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:28,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 12:51:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:51:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 12:51:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 12:51:28,082 INFO L87 Difference]: Start difference. First operand 3379 states and 13424 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:44,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:46,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:48,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:50,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:52,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:54,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:56,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:58,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:00,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:02,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:04,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:06,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:08,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:10,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:12,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:14,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:53:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:13,826 INFO L93 Difference]: Finished difference Result 44751 states and 184127 transitions. [2022-11-16 12:53:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:53:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:13,983 INFO L225 Difference]: With dead ends: 44751 [2022-11-16 12:53:13,983 INFO L226 Difference]: Without dead ends: 44751 [2022-11-16 12:53:13,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=934, Invalid=1718, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:53:13,984 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 12136 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 9413 mSolverCounterSat, 562 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12136 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 9990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 9413 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:13,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12136 Valid, 1813 Invalid, 9990 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [562 Valid, 9413 Invalid, 15 Unknown, 0 Unchecked, 68.1s Time] [2022-11-16 12:53:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44751 states. [2022-11-16 12:53:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44751 to 3415. [2022-11-16 12:53:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3410 states have (on average 3.952492668621701) internal successors, (13478), 3414 states have internal predecessors, (13478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13478 transitions. [2022-11-16 12:53:14,364 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13478 transitions. Word has length 19 [2022-11-16 12:53:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:14,364 INFO L495 AbstractCegarLoop]: Abstraction has 3415 states and 13478 transitions. [2022-11-16 12:53:14,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13478 transitions. [2022-11-16 12:53:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:14,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:14,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:14,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:14,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:14,568 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash 99999746, now seen corresponding path program 1 times [2022-11-16 12:53:14,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:14,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711172791] [2022-11-16 12:53:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:14,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:14,569 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:14,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:53:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:15,287 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:53:15,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:53:15,313 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 1014 treesize of output 998 [2022-11-16 12:53:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:15,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:53:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:53:15,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:15,673 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711172791] [2022-11-16 12:53:15,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711172791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:15,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:15,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:53:15,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805737818] [2022-11-16 12:53:15,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:15,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:53:15,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:15,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:53:15,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:53:15,675 INFO L87 Difference]: Start difference. First operand 3415 states and 13478 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:15,866 INFO L93 Difference]: Finished difference Result 3415 states and 13476 transitions. [2022-11-16 12:53:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:53:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:15,875 INFO L225 Difference]: With dead ends: 3415 [2022-11-16 12:53:15,875 INFO L226 Difference]: Without dead ends: 3415 [2022-11-16 12:53:15,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:53:15,876 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:15,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:53:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2022-11-16 12:53:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3415. [2022-11-16 12:53:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3410 states have (on average 3.9519061583577715) internal successors, (13476), 3414 states have internal predecessors, (13476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13476 transitions. [2022-11-16 12:53:15,933 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13476 transitions. Word has length 19 [2022-11-16 12:53:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:15,933 INFO L495 AbstractCegarLoop]: Abstraction has 3415 states and 13476 transitions. [2022-11-16 12:53:15,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13476 transitions. [2022-11-16 12:53:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:15,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:15,936 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:15,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:16,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:16,137 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1258443508, now seen corresponding path program 1 times [2022-11-16 12:53:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:16,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853596779] [2022-11-16 12:53:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:16,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:16,138 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-16 12:53:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:16,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:53:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:16,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:16,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:16,915 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:53:16,915 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:53:16,925 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 22 treesize of output 20 [2022-11-16 12:53:16,992 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:53:16,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:53:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:17,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:18,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:18,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853596779] [2022-11-16 12:53:18,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853596779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:18,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:18,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:53:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96880935] [2022-11-16 12:53:18,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:53:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:53:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:53:18,870 INFO L87 Difference]: Start difference. First operand 3415 states and 13476 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:20,453 INFO L93 Difference]: Finished difference Result 4696 states and 18604 transitions. [2022-11-16 12:53:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:53:20,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:20,466 INFO L225 Difference]: With dead ends: 4696 [2022-11-16 12:53:20,466 INFO L226 Difference]: Without dead ends: 4696 [2022-11-16 12:53:20,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:53:20,467 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 396 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:20,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 102 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 216 Invalid, 0 Unknown, 134 Unchecked, 1.0s Time] [2022-11-16 12:53:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2022-11-16 12:53:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3425. [2022-11-16 12:53:20,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3420 states have (on average 3.953216374269006) internal successors, (13520), 3424 states have internal predecessors, (13520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 13520 transitions. [2022-11-16 12:53:20,536 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 13520 transitions. Word has length 19 [2022-11-16 12:53:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:20,537 INFO L495 AbstractCegarLoop]: Abstraction has 3425 states and 13520 transitions. [2022-11-16 12:53:20,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 13520 transitions. [2022-11-16 12:53:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:20,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:20,539 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:20,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:20,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:20,740 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1261739335, now seen corresponding path program 1 times [2022-11-16 12:53:20,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:20,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580375929] [2022-11-16 12:53:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:20,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:20,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:20,742 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:20,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-16 12:53:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:21,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:53:21,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:21,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:21,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:21,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:21,456 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:53:21,456 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:53:21,465 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 22 treesize of output 20 [2022-11-16 12:53:21,526 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:53:21,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:53:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:53:22,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:53:23,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580375929] [2022-11-16 12:53:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580375929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:23,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:23,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:53:23,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182772509] [2022-11-16 12:53:23,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:23,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:53:23,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:53:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:53:23,426 INFO L87 Difference]: Start difference. First operand 3425 states and 13520 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:25,395 INFO L93 Difference]: Finished difference Result 5729 states and 22922 transitions. [2022-11-16 12:53:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:53:25,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:25,410 INFO L225 Difference]: With dead ends: 5729 [2022-11-16 12:53:25,410 INFO L226 Difference]: Without dead ends: 5729 [2022-11-16 12:53:25,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:53:25,411 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 298 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:25,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 109 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 222 Invalid, 0 Unknown, 97 Unchecked, 1.1s Time] [2022-11-16 12:53:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5729 states. [2022-11-16 12:53:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5729 to 3429. [2022-11-16 12:53:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3424 states have (on average 3.9526869158878504) internal successors, (13534), 3428 states have internal predecessors, (13534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13534 transitions. [2022-11-16 12:53:25,483 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13534 transitions. Word has length 19 [2022-11-16 12:53:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:25,483 INFO L495 AbstractCegarLoop]: Abstraction has 3429 states and 13534 transitions. [2022-11-16 12:53:25,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13534 transitions. [2022-11-16 12:53:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:25,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:25,486 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:25,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-16 12:53:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:25,686 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1261739397, now seen corresponding path program 1 times [2022-11-16 12:53:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:25,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575713929] [2022-11-16 12:53:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:25,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:25,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:25,688 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:25,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:53:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:53:26,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:53:26,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:26,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575713929] [2022-11-16 12:53:26,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575713929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:26,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:26,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 12:53:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966380443] [2022-11-16 12:53:26,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:26,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:53:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:53:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:53:26,762 INFO L87 Difference]: Start difference. First operand 3429 states and 13534 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:27,984 INFO L93 Difference]: Finished difference Result 4948 states and 20319 transitions. [2022-11-16 12:53:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:53:27,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:27,999 INFO L225 Difference]: With dead ends: 4948 [2022-11-16 12:53:27,999 INFO L226 Difference]: Without dead ends: 4948 [2022-11-16 12:53:27,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:53:27,999 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 149 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:27,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 18 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 338 Unchecked, 0.9s Time] [2022-11-16 12:53:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2022-11-16 12:53:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 4037. [2022-11-16 12:53:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 4032 states have (on average 4.047123015873016) internal successors, (16318), 4036 states have internal predecessors, (16318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 16318 transitions. [2022-11-16 12:53:28,078 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 16318 transitions. Word has length 19 [2022-11-16 12:53:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:28,078 INFO L495 AbstractCegarLoop]: Abstraction has 4037 states and 16318 transitions. [2022-11-16 12:53:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 16318 transitions. [2022-11-16 12:53:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:28,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:28,081 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:28,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:28,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:28,282 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:28,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1261335777, now seen corresponding path program 2 times [2022-11-16 12:53:28,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:28,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927009449] [2022-11-16 12:53:28,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:53:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:28,283 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:28,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-16 12:53:28,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:53:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:53:28,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:28,930 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:53:28,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:53:28,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 428 treesize of output 420 [2022-11-16 12:53:29,079 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:53:29,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:53:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:53:29,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:29,570 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927009449] [2022-11-16 12:53:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927009449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:29,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:29,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:53:29,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504231655] [2022-11-16 12:53:29,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:29,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:53:29,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:53:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:53:29,572 INFO L87 Difference]: Start difference. First operand 4037 states and 16318 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:30,062 INFO L93 Difference]: Finished difference Result 7128 states and 29785 transitions. [2022-11-16 12:53:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:53:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:30,084 INFO L225 Difference]: With dead ends: 7128 [2022-11-16 12:53:30,084 INFO L226 Difference]: Without dead ends: 7128 [2022-11-16 12:53:30,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:53:30,085 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:30,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 44 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 96 Unchecked, 0.4s Time] [2022-11-16 12:53:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2022-11-16 12:53:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 4147. [2022-11-16 12:53:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4147 states, 4142 states have (on average 4.052148720424915) internal successors, (16784), 4146 states have internal predecessors, (16784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 16784 transitions. [2022-11-16 12:53:30,193 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 16784 transitions. Word has length 19 [2022-11-16 12:53:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:30,193 INFO L495 AbstractCegarLoop]: Abstraction has 4147 states and 16784 transitions. [2022-11-16 12:53:30,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 16784 transitions. [2022-11-16 12:53:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:30,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:30,197 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:30,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-11-16 12:53:30,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:30,407 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:30,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1632163257, now seen corresponding path program 3 times [2022-11-16 12:53:30,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:30,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703072573] [2022-11-16 12:53:30,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:53:30,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:30,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:30,408 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:30,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-16 12:53:30,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:53:30,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:53:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:30,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:30,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:30,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:30,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:31,036 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:53:31,036 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:53:31,048 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 22 treesize of output 20 [2022-11-16 12:53:31,120 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:53:31,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:53:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:53:31,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:31,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:31,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703072573] [2022-11-16 12:53:31,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703072573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:31,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:31,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:53:31,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648466050] [2022-11-16 12:53:31,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:31,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:53:31,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:53:31,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:53:31,638 INFO L87 Difference]: Start difference. First operand 4147 states and 16784 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:32,083 INFO L93 Difference]: Finished difference Result 7109 states and 29735 transitions. [2022-11-16 12:53:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:53:32,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:32,105 INFO L225 Difference]: With dead ends: 7109 [2022-11-16 12:53:32,105 INFO L226 Difference]: Without dead ends: 7109 [2022-11-16 12:53:32,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:53:32,106 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:32,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 36 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-11-16 12:53:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7109 states. [2022-11-16 12:53:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7109 to 4104. [2022-11-16 12:53:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4099 states have (on average 4.055379360819712) internal successors, (16623), 4103 states have internal predecessors, (16623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 16623 transitions. [2022-11-16 12:53:32,206 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 16623 transitions. Word has length 19 [2022-11-16 12:53:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:32,206 INFO L495 AbstractCegarLoop]: Abstraction has 4104 states and 16623 transitions. [2022-11-16 12:53:32,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 16623 transitions. [2022-11-16 12:53:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:32,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:32,210 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:32,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-16 12:53:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:32,411 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:32,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1227928541, now seen corresponding path program 2 times [2022-11-16 12:53:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:32,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595818371] [2022-11-16 12:53:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:53:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:32,413 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:32,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:32,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:53:32,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:53:32,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:32,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:32,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:32,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:33,053 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:53:33,053 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:53:33,065 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 22 treesize of output 20 [2022-11-16 12:53:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:33,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:53:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:53:33,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:33,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:33,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595818371] [2022-11-16 12:53:33,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595818371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:33,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:33,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:53:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736322676] [2022-11-16 12:53:33,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:33,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:53:33,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:53:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:53:33,447 INFO L87 Difference]: Start difference. First operand 4104 states and 16623 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:33,645 INFO L93 Difference]: Finished difference Result 4144 states and 16730 transitions. [2022-11-16 12:53:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:53:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:33,657 INFO L225 Difference]: With dead ends: 4144 [2022-11-16 12:53:33,657 INFO L226 Difference]: Without dead ends: 4144 [2022-11-16 12:53:33,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:53:33,657 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:33,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:53:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2022-11-16 12:53:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4116. [2022-11-16 12:53:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4111 states have (on average 4.0503527122354654) internal successors, (16651), 4115 states have internal predecessors, (16651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 16651 transitions. [2022-11-16 12:53:33,731 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 16651 transitions. Word has length 19 [2022-11-16 12:53:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:33,731 INFO L495 AbstractCegarLoop]: Abstraction has 4116 states and 16651 transitions. [2022-11-16 12:53:33,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 16651 transitions. [2022-11-16 12:53:33,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:33,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:33,736 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:33,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:33,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:33,936 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:33,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1049133289, now seen corresponding path program 2 times [2022-11-16 12:53:33,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:33,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316247964] [2022-11-16 12:53:33,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:53:33,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:33,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:33,938 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:33,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-16 12:53:34,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:53:34,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 12:53:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:34,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:34,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:34,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:34,586 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:53:34,586 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:53:34,598 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 22 treesize of output 20 [2022-11-16 12:53:34,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:34,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:53:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:53:35,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:35,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:35,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316247964] [2022-11-16 12:53:35,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316247964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:35,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:35,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:53:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937025322] [2022-11-16 12:53:35,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:35,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:53:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:53:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:53:35,015 INFO L87 Difference]: Start difference. First operand 4116 states and 16651 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:35,209 INFO L93 Difference]: Finished difference Result 4120 states and 16660 transitions. [2022-11-16 12:53:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:53:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:35,221 INFO L225 Difference]: With dead ends: 4120 [2022-11-16 12:53:35,222 INFO L226 Difference]: Without dead ends: 4120 [2022-11-16 12:53:35,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:53:35,222 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:35,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:53:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2022-11-16 12:53:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 4108. [2022-11-16 12:53:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 4103 states have (on average 4.050694613697295) internal successors, (16620), 4107 states have internal predecessors, (16620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 16620 transitions. [2022-11-16 12:53:35,299 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 16620 transitions. Word has length 19 [2022-11-16 12:53:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:35,300 INFO L495 AbstractCegarLoop]: Abstraction has 4108 states and 16620 transitions. [2022-11-16 12:53:35,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 16620 transitions. [2022-11-16 12:53:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:53:35,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:35,303 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:35,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:35,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:35,504 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1049242998, now seen corresponding path program 2 times [2022-11-16 12:53:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:35,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112958658] [2022-11-16 12:53:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:53:35,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:35,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:35,506 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:35,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-16 12:53:35,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:53:35,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:35,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:53:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:35,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:36,196 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:53:36,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:53:36,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 178 [2022-11-16 12:53:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:36,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:53:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:53:36,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:36,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:36,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112958658] [2022-11-16 12:53:36,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112958658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:36,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:36,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:53:36,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881916171] [2022-11-16 12:53:36,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:36,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:53:36,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:36,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:53:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:53:36,608 INFO L87 Difference]: Start difference. First operand 4108 states and 16620 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:36,787 INFO L93 Difference]: Finished difference Result 4134 states and 16729 transitions. [2022-11-16 12:53:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:53:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:53:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:36,798 INFO L225 Difference]: With dead ends: 4134 [2022-11-16 12:53:36,798 INFO L226 Difference]: Without dead ends: 4134 [2022-11-16 12:53:36,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:53:36,799 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:36,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-16 12:53:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2022-11-16 12:53:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 4109. [2022-11-16 12:53:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4104 states have (on average 4.050438596491228) internal successors, (16623), 4108 states have internal predecessors, (16623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 16623 transitions. [2022-11-16 12:53:36,896 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 16623 transitions. Word has length 19 [2022-11-16 12:53:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:36,896 INFO L495 AbstractCegarLoop]: Abstraction has 4109 states and 16623 transitions. [2022-11-16 12:53:36,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 16623 transitions. [2022-11-16 12:53:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:53:36,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:36,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:36,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:37,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:37,101 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:37,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1194975206, now seen corresponding path program 1 times [2022-11-16 12:53:37,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:37,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528937888] [2022-11-16 12:53:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:37,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:37,103 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:37,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:53:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:37,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:37,880 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:53:37,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:53:37,910 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 3062 treesize of output 2998 [2022-11-16 12:53:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:38,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:53:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:53:38,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:53:38,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:38,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528937888] [2022-11-16 12:53:38,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528937888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:53:38,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:53:38,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:53:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365774072] [2022-11-16 12:53:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:53:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:53:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:53:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:53:38,370 INFO L87 Difference]: Start difference. First operand 4109 states and 16623 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:38,576 INFO L93 Difference]: Finished difference Result 4109 states and 16622 transitions. [2022-11-16 12:53:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:53:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:53:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:38,588 INFO L225 Difference]: With dead ends: 4109 [2022-11-16 12:53:38,588 INFO L226 Difference]: Without dead ends: 4109 [2022-11-16 12:53:38,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:53:38,588 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:38,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-16 12:53:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2022-11-16 12:53:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 4109. [2022-11-16 12:53:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4104 states have (on average 4.050194931773879) internal successors, (16622), 4108 states have internal predecessors, (16622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 16622 transitions. [2022-11-16 12:53:38,663 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 16622 transitions. Word has length 20 [2022-11-16 12:53:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:38,663 INFO L495 AbstractCegarLoop]: Abstraction has 4109 states and 16622 transitions. [2022-11-16 12:53:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 16622 transitions. [2022-11-16 12:53:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:53:38,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:38,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:38,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:38,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:38,868 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 357052999, now seen corresponding path program 1 times [2022-11-16 12:53:38,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:38,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364811716] [2022-11-16 12:53:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:38,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:38,869 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:38,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-16 12:53:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:53:39,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:39,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:39,736 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:53:39,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:53:39,767 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 2038 treesize of output 2006 [2022-11-16 12:53:39,899 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:53:39,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:53:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:40,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:53:41,933 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:41,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364811716] [2022-11-16 12:53:41,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364811716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:41,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:41,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:53:41,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850794030] [2022-11-16 12:53:41,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:41,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:53:41,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:41,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:53:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:53:41,936 INFO L87 Difference]: Start difference. First operand 4109 states and 16622 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:43,523 INFO L93 Difference]: Finished difference Result 6912 states and 28390 transitions. [2022-11-16 12:53:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:53:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:53:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:43,545 INFO L225 Difference]: With dead ends: 6912 [2022-11-16 12:53:43,545 INFO L226 Difference]: Without dead ends: 6912 [2022-11-16 12:53:43,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:53:43,545 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 202 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:43,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 90 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 227 Invalid, 0 Unknown, 213 Unchecked, 1.1s Time] [2022-11-16 12:53:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6912 states. [2022-11-16 12:53:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6912 to 4118. [2022-11-16 12:53:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4118 states, 4113 states have (on average 4.058594699732556) internal successors, (16693), 4117 states have internal predecessors, (16693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 16693 transitions. [2022-11-16 12:53:43,649 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 16693 transitions. Word has length 20 [2022-11-16 12:53:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:43,649 INFO L495 AbstractCegarLoop]: Abstraction has 4118 states and 16693 transitions. [2022-11-16 12:53:43,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 16693 transitions. [2022-11-16 12:53:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:53:43,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:43,653 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:43,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:43,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:43,854 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:43,854 INFO L85 PathProgramCache]: Analyzing trace with hash 357042986, now seen corresponding path program 1 times [2022-11-16 12:53:43,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:43,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473625052] [2022-11-16 12:53:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:53:43,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:43,855 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:43,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 12:53:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:53:44,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:53:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:44,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:44,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:44,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:53:44,663 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:53:44,663 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:53:44,674 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 22 treesize of output 20 [2022-11-16 12:53:44,738 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:53:44,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:53:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:53:45,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:53:46,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:46,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473625052] [2022-11-16 12:53:46,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473625052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:46,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:46,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 12:53:46,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364007877] [2022-11-16 12:53:46,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:46,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:53:46,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:53:46,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:53:46,786 INFO L87 Difference]: Start difference. First operand 4118 states and 16693 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:48,759 INFO L93 Difference]: Finished difference Result 6923 states and 28419 transitions. [2022-11-16 12:53:48,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:53:48,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:53:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:48,782 INFO L225 Difference]: With dead ends: 6923 [2022-11-16 12:53:48,782 INFO L226 Difference]: Without dead ends: 6923 [2022-11-16 12:53:48,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:53:48,782 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 344 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:48,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 110 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 263 Invalid, 0 Unknown, 251 Unchecked, 1.3s Time] [2022-11-16 12:53:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6923 states. [2022-11-16 12:53:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6923 to 4144. [2022-11-16 12:53:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4139 states have (on average 4.057743416284127) internal successors, (16795), 4143 states have internal predecessors, (16795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 16795 transitions. [2022-11-16 12:53:48,885 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 16795 transitions. Word has length 20 [2022-11-16 12:53:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:48,886 INFO L495 AbstractCegarLoop]: Abstraction has 4144 states and 16795 transitions. [2022-11-16 12:53:48,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 16795 transitions. [2022-11-16 12:53:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:53:48,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:48,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:48,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:49,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:49,090 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:49,091 INFO L85 PathProgramCache]: Analyzing trace with hash 459130078, now seen corresponding path program 4 times [2022-11-16 12:53:49,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:49,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145976682] [2022-11-16 12:53:49,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:53:49,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:49,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:49,092 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:49,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:49,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:53:49,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:49,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:53:49,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:53:49,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:53:50,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:50,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145976682] [2022-11-16 12:53:50,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145976682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:50,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:50,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 12:53:50,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559789575] [2022-11-16 12:53:50,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:50,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:53:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:50,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:53:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:53:50,307 INFO L87 Difference]: Start difference. First operand 4144 states and 16795 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:53,295 INFO L93 Difference]: Finished difference Result 9296 states and 36932 transitions. [2022-11-16 12:53:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:53:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:53:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:53,323 INFO L225 Difference]: With dead ends: 9296 [2022-11-16 12:53:53,323 INFO L226 Difference]: Without dead ends: 9296 [2022-11-16 12:53:53,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:53:53,324 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 272 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:53,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 31 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 569 Invalid, 0 Unknown, 328 Unchecked, 2.0s Time] [2022-11-16 12:53:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9296 states. [2022-11-16 12:53:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9296 to 5791. [2022-11-16 12:53:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5791 states, 5786 states have (on average 4.127894918769443) internal successors, (23884), 5790 states have internal predecessors, (23884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 23884 transitions. [2022-11-16 12:53:53,476 INFO L78 Accepts]: Start accepts. Automaton has 5791 states and 23884 transitions. Word has length 20 [2022-11-16 12:53:53,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:53,477 INFO L495 AbstractCegarLoop]: Abstraction has 5791 states and 23884 transitions. [2022-11-16 12:53:53,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5791 states and 23884 transitions. [2022-11-16 12:53:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:53:53,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:53,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:53,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:53:53,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:53,685 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash 446906158, now seen corresponding path program 5 times [2022-11-16 12:53:53,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:53,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436886613] [2022-11-16 12:53:53,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:53:53,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:53,686 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:53,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 12:53:54,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:53:54,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:54,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:53:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:53:54,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:53:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:53:55,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:53:55,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436886613] [2022-11-16 12:53:55,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436886613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:53:55,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:53:55,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-16 12:53:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018862666] [2022-11-16 12:53:55,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:53:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:53:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:53:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:53:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:53:55,346 INFO L87 Difference]: Start difference. First operand 5791 states and 23884 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:58,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:53:58,905 INFO L93 Difference]: Finished difference Result 16234 states and 68161 transitions. [2022-11-16 12:53:58,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:53:58,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:53:58,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:53:58,959 INFO L225 Difference]: With dead ends: 16234 [2022-11-16 12:53:58,959 INFO L226 Difference]: Without dead ends: 16234 [2022-11-16 12:53:58,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:53:58,959 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 287 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:53:58,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 16 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 649 Invalid, 0 Unknown, 455 Unchecked, 2.8s Time] [2022-11-16 12:53:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16234 states. [2022-11-16 12:53:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16234 to 9079. [2022-11-16 12:53:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9079 states, 9074 states have (on average 4.395305267798104) internal successors, (39883), 9078 states have internal predecessors, (39883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9079 states to 9079 states and 39883 transitions. [2022-11-16 12:53:59,231 INFO L78 Accepts]: Start accepts. Automaton has 9079 states and 39883 transitions. Word has length 20 [2022-11-16 12:53:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:53:59,231 INFO L495 AbstractCegarLoop]: Abstraction has 9079 states and 39883 transitions. [2022-11-16 12:53:59,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:53:59,231 INFO L276 IsEmpty]: Start isEmpty. Operand 9079 states and 39883 transitions. [2022-11-16 12:53:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:53:59,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:53:59,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:53:59,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:53:59,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:59,441 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:53:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:53:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 446617858, now seen corresponding path program 6 times [2022-11-16 12:53:59,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:53:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413704156] [2022-11-16 12:53:59,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:53:59,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:53:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:53:59,447 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:53:59,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-16 12:53:59,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 12:53:59,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:53:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:53:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:53:59,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:00,164 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:54:00,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:54:00,194 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 3686 treesize of output 3622 [2022-11-16 12:54:00,491 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:54:00,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:54:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:54:00,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:54:02,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:54:02,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413704156] [2022-11-16 12:54:02,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413704156] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:54:02,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:54:02,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2022-11-16 12:54:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265291444] [2022-11-16 12:54:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:54:02,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:54:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:54:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:54:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:54:02,064 INFO L87 Difference]: Start difference. First operand 9079 states and 39883 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:02,460 INFO L93 Difference]: Finished difference Result 9119 states and 39861 transitions. [2022-11-16 12:54:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:54:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:54:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:02,491 INFO L225 Difference]: With dead ends: 9119 [2022-11-16 12:54:02,491 INFO L226 Difference]: Without dead ends: 9119 [2022-11-16 12:54:02,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:54:02,492 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:02,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 24 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-16 12:54:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9119 states. [2022-11-16 12:54:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9119 to 4708. [2022-11-16 12:54:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4704 states have (on average 4.292304421768708) internal successors, (20191), 4707 states have internal predecessors, (20191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 20191 transitions. [2022-11-16 12:54:02,623 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 20191 transitions. Word has length 20 [2022-11-16 12:54:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:02,623 INFO L495 AbstractCegarLoop]: Abstraction has 4708 states and 20191 transitions. [2022-11-16 12:54:02,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 20191 transitions. [2022-11-16 12:54:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:54:02,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:02,630 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:02,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-11-16 12:54:02,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:02,830 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:54:02,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash 588827578, now seen corresponding path program 1 times [2022-11-16 12:54:02,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:54:02,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521764532] [2022-11-16 12:54:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:02,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:02,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:54:02,832 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:54:02,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:54:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:54:03,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:03,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:03,659 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:54:03,660 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:54:03,673 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 22 treesize of output 20 [2022-11-16 12:54:03,740 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:54:03,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:54:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:54:04,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:54:06,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:54:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521764532] [2022-11-16 12:54:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521764532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:54:06,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:54:06,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 12:54:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888243239] [2022-11-16 12:54:06,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:54:06,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:54:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:54:06,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:54:06,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:54:06,937 INFO L87 Difference]: Start difference. First operand 4708 states and 20191 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:11,811 INFO L93 Difference]: Finished difference Result 12762 states and 55937 transitions. [2022-11-16 12:54:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:54:11,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:54:11,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:11,861 INFO L225 Difference]: With dead ends: 12762 [2022-11-16 12:54:11,861 INFO L226 Difference]: Without dead ends: 12762 [2022-11-16 12:54:11,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:54:11,862 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 594 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:11,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 203 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 577 Invalid, 0 Unknown, 332 Unchecked, 2.3s Time] [2022-11-16 12:54:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2022-11-16 12:54:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 4708. [2022-11-16 12:54:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4704 states have (on average 4.292304421768708) internal successors, (20191), 4707 states have internal predecessors, (20191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 20191 transitions. [2022-11-16 12:54:12,037 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 20191 transitions. Word has length 20 [2022-11-16 12:54:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:12,037 INFO L495 AbstractCegarLoop]: Abstraction has 4708 states and 20191 transitions. [2022-11-16 12:54:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 20191 transitions. [2022-11-16 12:54:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:54:12,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:12,049 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:12,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:12,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:12,264 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:54:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:12,265 INFO L85 PathProgramCache]: Analyzing trace with hash -584927718, now seen corresponding path program 2 times [2022-11-16 12:54:12,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:54:12,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122856158] [2022-11-16 12:54:12,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:54:12,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:12,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:54:12,266 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:54:12,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-16 12:54:12,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:54:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:54:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:54:12,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:13,048 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-16 12:54:13,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-16 12:54:13,083 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 906 treesize of output 894 [2022-11-16 12:54:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:13,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 12:54:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 12:54:13,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:54:13,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:54:13,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122856158] [2022-11-16 12:54:13,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122856158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:54:13,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:54:13,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:54:13,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966278586] [2022-11-16 12:54:13,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:54:13,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:54:13,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:54:13,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:54:13,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:54:13,583 INFO L87 Difference]: Start difference. First operand 4708 states and 20191 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:13,770 INFO L93 Difference]: Finished difference Result 4750 states and 20354 transitions. [2022-11-16 12:54:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:54:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 12:54:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:13,784 INFO L225 Difference]: With dead ends: 4750 [2022-11-16 12:54:13,784 INFO L226 Difference]: Without dead ends: 4750 [2022-11-16 12:54:13,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:54:13,784 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:13,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-16 12:54:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4750 states. [2022-11-16 12:54:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4750 to 4704. [2022-11-16 12:54:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4700 states have (on average 4.293829787234043) internal successors, (20181), 4703 states have internal predecessors, (20181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 20181 transitions. [2022-11-16 12:54:13,875 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 20181 transitions. Word has length 26 [2022-11-16 12:54:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:13,875 INFO L495 AbstractCegarLoop]: Abstraction has 4704 states and 20181 transitions. [2022-11-16 12:54:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 20181 transitions. [2022-11-16 12:54:13,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:54:13,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:13,885 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:54:13,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:14,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:14,085 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:54:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1284602486, now seen corresponding path program 1 times [2022-11-16 12:54:14,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:54:14,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969942437] [2022-11-16 12:54:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:54:14,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:54:14,087 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:54:14,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 12:54:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:54:14,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:54:14,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:14,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:14,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:14,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:54:15,045 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 12:54:15,045 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-16 12:54:15,055 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 22 treesize of output 20 [2022-11-16 12:54:15,117 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 12:54:15,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 12:54:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:54:17,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:54:21,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:54:21,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969942437] [2022-11-16 12:54:21,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969942437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:54:21,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:54:21,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2022-11-16 12:54:21,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157395815] [2022-11-16 12:54:21,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:54:21,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:54:21,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:54:21,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:54:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:54:21,671 INFO L87 Difference]: Start difference. First operand 4704 states and 20181 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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) [2022-11-16 12:54:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:54:33,613 INFO L93 Difference]: Finished difference Result 15330 states and 67830 transitions. [2022-11-16 12:54:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:54:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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 26 [2022-11-16 12:54:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:54:33,669 INFO L225 Difference]: With dead ends: 15330 [2022-11-16 12:54:33,669 INFO L226 Difference]: Without dead ends: 15330 [2022-11-16 12:54:33,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=691, Invalid=1661, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:54:33,670 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 288 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:54:33,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 369 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 834 Invalid, 0 Unknown, 481 Unchecked, 3.0s Time] [2022-11-16 12:54:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15330 states. [2022-11-16 12:54:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15330 to 4821. [2022-11-16 12:54:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4821 states, 4817 states have (on average 4.292920905127673) internal successors, (20679), 4820 states have internal predecessors, (20679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:54:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4821 states to 4821 states and 20679 transitions. [2022-11-16 12:54:33,871 INFO L78 Accepts]: Start accepts. Automaton has 4821 states and 20679 transitions. Word has length 26 [2022-11-16 12:54:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:54:33,871 INFO L495 AbstractCegarLoop]: Abstraction has 4821 states and 20679 transitions. [2022-11-16 12:54:33,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 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) [2022-11-16 12:54:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4821 states and 20679 transitions. [2022-11-16 12:54:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:54:33,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:54:33,882 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1] [2022-11-16 12:54:33,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 12:54:34,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:34,095 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-16 12:54:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:54:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2133542724, now seen corresponding path program 4 times [2022-11-16 12:54:34,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 12:54:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752568956] [2022-11-16 12:54:34,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:54:34,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 12:54:34,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 12:54:34,097 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 12:54:34,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87f114c-547b-4c5b-b1f2-355930460219/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 12:54:34,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:54:34,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:54:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 12:54:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:54:34,882 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 12:54:34,882 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 12:54:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:37,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:54:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:54:55,567 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 12:54:55,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752568956] [2022-11-16 12:54:55,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752568956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:54:55,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:54:55,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 50 [2022-11-16 12:54:55,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560325202] [2022-11-16 12:54:55,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:54:55,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:54:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 12:54:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:54:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=1926, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:54:55,569 INFO L87 Difference]: Start difference. First operand 4821 states and 20679 transitions. Second operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 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) [2022-11-16 12:55:46,359 WARN L233 SmtUtils]: Spent 24.10s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:56:11,436 WARN L233 SmtUtils]: Spent 21.46s on a formula simplification that was a NOOP. DAG size: 265 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:56:13,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:15,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:17,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:19,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:21,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:23,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:25,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:27,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:29,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:31,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:33,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:35,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:37,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:39,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:41,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:43,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:45,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:47,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:49,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:51,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:53,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:55,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:57,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:56:59,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 12:57:30,220 WARN L233 SmtUtils]: Spent 26.84s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:57:47,631 WARN L233 SmtUtils]: Spent 13.96s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:58:04,417 WARN L233 SmtUtils]: Spent 13.36s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:58:23,541 WARN L233 SmtUtils]: Spent 16.28s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:58:43,357 WARN L233 SmtUtils]: Spent 15.92s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:58:56,097 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:59:07,376 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:59:16,563 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)