./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:27:42,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:27:42,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:27:42,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:27:42,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:27:42,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:27:42,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:27:42,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:27:42,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:27:42,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:27:42,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:27:42,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:27:42,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:27:42,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:27:42,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:27:42,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:27:42,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:27:42,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:27:42,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:27:42,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:27:42,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:27:42,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:27:42,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:27:42,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:27:42,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:27:42,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:27:42,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:27:42,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:27:42,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:27:42,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:27:42,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:27:42,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:27:42,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:27:42,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:27:42,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:27:42,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:27:42,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:27:42,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:27:42,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:27:42,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:27:42,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:27:42,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:27:42,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:27:42,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:27:42,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:27:42,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:27:42,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:27:42,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:27:42,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:27:42,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:27:42,667 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:27:42,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:27:42,667 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:27:42,667 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:27:42,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:27:42,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:27:42,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:27:42,668 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:27:42,669 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:27:42,669 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:27:42,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:27:42,669 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:27:42,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:27:42,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:27:42,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:27:42,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:27:42,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:27:42,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:27:42,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:27:42,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:27:42,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:27:42,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:27:42,672 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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 [2022-11-16 11:27:42,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:27:43,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:27:43,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:27:43,018 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:27:43,019 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:27:43,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-16 11:27:43,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/33482ff74/56a7fc5bc56e4ae28d34eb8ea74743b8/FLAG67554f83b [2022-11-16 11:27:43,780 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:27:43,784 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-16 11:27:43,797 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/33482ff74/56a7fc5bc56e4ae28d34eb8ea74743b8/FLAG67554f83b [2022-11-16 11:27:44,125 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/33482ff74/56a7fc5bc56e4ae28d34eb8ea74743b8 [2022-11-16 11:27:44,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:27:44,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:27:44,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:27:44,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:27:44,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:27:44,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:27:44" (1/1) ... [2022-11-16 11:27:44,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d961d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:44, skipping insertion in model container [2022-11-16 11:27:44,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:27:44" (1/1) ... [2022-11-16 11:27:44,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:27:44,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:27:44,478 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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-16 11:27:44,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:27:44,517 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-16 11:27:44,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6ca14953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:44, skipping insertion in model container [2022-11-16 11:27:44,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:27:44,521 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:27:44,523 INFO L158 Benchmark]: Toolchain (without parser) took 390.07ms. Allocated memory is still 115.3MB. Free memory was 71.2MB in the beginning and 89.1MB in the end (delta: -17.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:27:44,525 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 115.3MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:27:44,526 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.23ms. Allocated memory is still 115.3MB. Free memory was 71.0MB in the beginning and 89.1MB in the end (delta: -18.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:27:44,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 115.3MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.23ms. Allocated memory is still 115.3MB. Free memory was 71.0MB in the beginning and 89.1MB in the end (delta: -18.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 145]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:27:46,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:27:46,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:27:46,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:27:46,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:27:46,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:27:46,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:27:46,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:27:46,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:27:46,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:27:46,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:27:46,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:27:46,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:27:46,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:27:46,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:27:46,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:27:46,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:27:46,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:27:46,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:27:46,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:27:46,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:27:46,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:27:46,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:27:46,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:27:46,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:27:46,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:27:46,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:27:46,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:27:46,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:27:46,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:27:46,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:27:46,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:27:46,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:27:46,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:27:46,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:27:46,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:27:46,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:27:46,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:27:46,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:27:46,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:27:46,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:27:46,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:27:46,925 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:27:46,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:27:46,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:27:46,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:27:46,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:27:46,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:27:46,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:27:46,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:27:46,932 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:27:46,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:27:46,934 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:27:46,934 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:27:46,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:27:46,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:27:46,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:27:46,936 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:27:46,936 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:27:46,936 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:27:46,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:27:46,937 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:27:46,937 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:27:46,938 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:27:46,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:27:46,938 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:27:46,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:27:46,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:27:46,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:27:46,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:27:46,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:27:46,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:27:46,941 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:27:46,941 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:27:46,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:27:46,942 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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 [2022-11-16 11:27:47,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:27:47,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:27:47,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:27:47,501 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:27:47,504 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:27:47,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-16 11:27:47,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/d162fab99/847670f3e8504e5bac4dfe43dcde8292/FLAG69b5b86e4 [2022-11-16 11:27:48,216 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:27:48,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-16 11:27:48,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/d162fab99/847670f3e8504e5bac4dfe43dcde8292/FLAG69b5b86e4 [2022-11-16 11:27:48,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/data/d162fab99/847670f3e8504e5bac4dfe43dcde8292 [2022-11-16 11:27:48,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:27:48,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:27:48,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:27:48,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:27:48,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:27:48,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:48,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be33a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48, skipping insertion in model container [2022-11-16 11:27:48,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:48,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:27:48,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:27:48,793 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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-16 11:27:48,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:27:48,832 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:27:48,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:27:48,889 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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-16 11:27:48,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:27:48,910 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:27:48,936 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_7259d9a2-7b01-45b1-81e5-a5175e8acae8/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-16 11:27:48,941 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:27:48,959 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:27:48,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48 WrapperNode [2022-11-16 11:27:48,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:27:48,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:27:48,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:27:48,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:27:48,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:48,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,014 INFO L138 Inliner]: procedures = 29, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 283 [2022-11-16 11:27:49,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:27:49,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:27:49,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:27:49,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:27:49,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:27:49,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:27:49,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:27:49,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:27:49,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (1/1) ... [2022-11-16 11:27:49,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:27:49,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:27:49,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:27:49,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:27:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:27:49,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:27:49,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:27:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:27:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:27:49,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:27:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:27:49,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:27:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:27:49,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:27:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 11:27:49,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 11:27:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:27:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:27:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:27:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:27:49,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:27:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:27:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 11:27:49,159 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:27:49,348 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:27:49,351 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:27:50,264 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:27:50,726 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:27:50,727 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 11:27:50,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:27:50 BoogieIcfgContainer [2022-11-16 11:27:50,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:27:50,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:27:50,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:27:50,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:27:50,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:27:48" (1/3) ... [2022-11-16 11:27:50,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2918a98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:27:50, skipping insertion in model container [2022-11-16 11:27:50,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:27:48" (2/3) ... [2022-11-16 11:27:50,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2918a98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:27:50, skipping insertion in model container [2022-11-16 11:27:50,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:27:50" (3/3) ... [2022-11-16 11:27:50,746 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2022-11-16 11:27:50,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:27:50,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-16 11:27:50,790 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:27:50,961 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 11:27:51,016 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:27:51,038 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 226 transitions, 484 flow [2022-11-16 11:27:51,042 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 226 transitions, 484 flow [2022-11-16 11:27:51,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 226 transitions, 484 flow [2022-11-16 11:27:51,210 INFO L130 PetriNetUnfolder]: 15/222 cut-off events. [2022-11-16 11:27:51,210 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 11:27:51,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 222 events. 15/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 206 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2022-11-16 11:27:51,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2022-11-16 11:28:21,151 WARN L233 SmtUtils]: Spent 6.46s 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 11:28:29,682 WARN L233 SmtUtils]: Spent 6.81s 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 11:28:31,991 INFO L134 LiptonReduction]: Checked pairs total: 7377 [2022-11-16 11:28:31,991 INFO L136 LiptonReduction]: Total number of compositions: 237 [2022-11-16 11:28:32,000 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 63 transitions, 158 flow [2022-11-16 11:28:32,241 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3750 states, 3346 states have (on average 4.950986252241482) internal successors, (16566), 3749 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:32,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:28:32,264 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;@31c85488, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:28:32,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2022-11-16 11:28:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 3750 states, 3346 states have (on average 4.950986252241482) internal successors, (16566), 3749 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:28:32,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:32,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:28:32,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:32,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash 38461, now seen corresponding path program 1 times [2022-11-16 11:28:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:32,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565613176] [2022-11-16 11:28:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:32,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:32,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:32,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:32,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 11:28:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:32,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:28:32,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:32,961 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-16 11:28:32,962 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 11:28:33,043 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-16 11:28:33,044 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 11:28:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:33,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:33,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565613176] [2022-11-16 11:28:33,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565613176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:33,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:33,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:33,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230753470] [2022-11-16 11:28:33,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:33,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:33,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:33,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:33,233 INFO L87 Difference]: Start difference. First operand has 3750 states, 3346 states have (on average 4.950986252241482) internal successors, (16566), 3749 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:33,777 INFO L93 Difference]: Finished difference Result 3750 states and 16570 transitions. [2022-11-16 11:28:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 11:28:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:33,846 INFO L225 Difference]: With dead ends: 3750 [2022-11-16 11:28:33,846 INFO L226 Difference]: Without dead ends: 3750 [2022-11-16 11:28:33,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:33,856 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:33,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-11-16 11:28:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-11-16 11:28:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3750. [2022-11-16 11:28:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 3347 states have (on average 4.950702121302659) internal successors, (16570), 3749 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 16570 transitions. [2022-11-16 11:28:34,268 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 16570 transitions. Word has length 2 [2022-11-16 11:28:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:34,269 INFO L495 AbstractCegarLoop]: Abstraction has 3750 states and 16570 transitions. [2022-11-16 11:28:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 16570 transitions. [2022-11-16 11:28:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:28:34,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:34,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:28:34,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:34,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash 38462, now seen corresponding path program 1 times [2022-11-16 11:28:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:34,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786730667] [2022-11-16 11:28:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:34,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:34,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:34,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:34,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 11:28:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:28:34,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:34,852 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 11:28:34,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 69 [2022-11-16 11:28:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:35,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:35,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:35,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786730667] [2022-11-16 11:28:35,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786730667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:35,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:35,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:35,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347834163] [2022-11-16 11:28:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:35,023 INFO L87 Difference]: Start difference. First operand 3750 states and 16570 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:35,441 INFO L93 Difference]: Finished difference Result 3750 states and 16569 transitions. [2022-11-16 11:28:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:35,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 11:28:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:35,500 INFO L225 Difference]: With dead ends: 3750 [2022-11-16 11:28:35,501 INFO L226 Difference]: Without dead ends: 3750 [2022-11-16 11:28:35,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:35,508 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:35,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-11-16 11:28:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-11-16 11:28:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3750. [2022-11-16 11:28:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 3347 states have (on average 4.950403346280251) internal successors, (16569), 3749 states have internal predecessors, (16569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 16569 transitions. [2022-11-16 11:28:35,938 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 16569 transitions. Word has length 2 [2022-11-16 11:28:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:35,938 INFO L495 AbstractCegarLoop]: Abstraction has 3750 states and 16569 transitions. [2022-11-16 11:28:35,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 16569 transitions. [2022-11-16 11:28:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:28:35,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:35,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:28:35,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:36,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:36,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:36,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:36,156 INFO L85 PathProgramCache]: Analyzing trace with hash 38281, now seen corresponding path program 1 times [2022-11-16 11:28:36,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:36,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508257815] [2022-11-16 11:28:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:36,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:36,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:36,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:36,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 11:28:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:36,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:28:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:36,586 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 11:28:36,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:28:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:36,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:36,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:36,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508257815] [2022-11-16 11:28:36,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508257815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:36,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:36,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:36,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301402631] [2022-11-16 11:28:36,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:36,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:36,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:36,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:36,638 INFO L87 Difference]: Start difference. First operand 3750 states and 16569 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:37,029 INFO L93 Difference]: Finished difference Result 3749 states and 16567 transitions. [2022-11-16 11:28:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 11:28:37,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:37,085 INFO L225 Difference]: With dead ends: 3749 [2022-11-16 11:28:37,085 INFO L226 Difference]: Without dead ends: 3749 [2022-11-16 11:28:37,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:37,087 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:37,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:28:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-11-16 11:28:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3749. [2022-11-16 11:28:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3347 states have (on average 4.9498057962354345) internal successors, (16567), 3748 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 16567 transitions. [2022-11-16 11:28:37,371 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 16567 transitions. Word has length 2 [2022-11-16 11:28:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:37,372 INFO L495 AbstractCegarLoop]: Abstraction has 3749 states and 16567 transitions. [2022-11-16 11:28:37,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 16567 transitions. [2022-11-16 11:28:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:28:37,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:37,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:28:37,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:37,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:37,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 38282, now seen corresponding path program 1 times [2022-11-16 11:28:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:37,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623293032] [2022-11-16 11:28:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:37,599 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 11:28:37,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:37,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:37,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 11:28:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:37,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:28:37,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:38,009 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:28:38,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:28:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:38,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:38,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623293032] [2022-11-16 11:28:38,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623293032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:38,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:38,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920605011] [2022-11-16 11:28:38,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:38,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:38,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:38,066 INFO L87 Difference]: Start difference. First operand 3749 states and 16567 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:38,928 INFO L93 Difference]: Finished difference Result 7492 states and 33124 transitions. [2022-11-16 11:28:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 11:28:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:39,019 INFO L225 Difference]: With dead ends: 7492 [2022-11-16 11:28:39,020 INFO L226 Difference]: Without dead ends: 7492 [2022-11-16 11:28:39,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:39,023 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:39,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:28:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-11-16 11:28:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 3749. [2022-11-16 11:28:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3347 states have (on average 4.9495070212130265) internal successors, (16566), 3748 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 16566 transitions. [2022-11-16 11:28:39,376 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 16566 transitions. Word has length 2 [2022-11-16 11:28:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:39,376 INFO L495 AbstractCegarLoop]: Abstraction has 3749 states and 16566 transitions. [2022-11-16 11:28:39,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 16566 transitions. [2022-11-16 11:28:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:28:39,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:39,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:28:39,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:39,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:39,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:39,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:39,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1191599, now seen corresponding path program 1 times [2022-11-16 11:28:39,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:39,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230008679] [2022-11-16 11:28:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:39,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:39,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:39,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:39,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 11:28:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:28:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:40,064 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:28:40,065 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 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:28:40,145 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-16 11:28:40,145 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 89 treesize of output 88 [2022-11-16 11:28:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:40,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:40,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230008679] [2022-11-16 11:28:40,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230008679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:40,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:40,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:28:40,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199821450] [2022-11-16 11:28:40,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:40,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:28:40,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:28:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:40,749 INFO L87 Difference]: Start difference. First operand 3749 states and 16566 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:41,181 INFO L93 Difference]: Finished difference Result 3751 states and 16574 transitions. [2022-11-16 11:28:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:28:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:28:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:41,219 INFO L225 Difference]: With dead ends: 3751 [2022-11-16 11:28:41,219 INFO L226 Difference]: Without dead ends: 3751 [2022-11-16 11:28:41,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:41,221 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:41,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-11-16 11:28:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-11-16 11:28:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3751. [2022-11-16 11:28:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3349 states have (on average 4.948939982084204) internal successors, (16574), 3750 states have internal predecessors, (16574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:41,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 16574 transitions. [2022-11-16 11:28:41,435 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 16574 transitions. Word has length 3 [2022-11-16 11:28:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:41,435 INFO L495 AbstractCegarLoop]: Abstraction has 3751 states and 16574 transitions. [2022-11-16 11:28:41,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 16574 transitions. [2022-11-16 11:28:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:28:41,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:41,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:28:41,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:41,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:41,652 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1191600, now seen corresponding path program 1 times [2022-11-16 11:28:41,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:41,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569195828] [2022-11-16 11:28:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:41,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:41,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:41,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:41,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 11:28:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:28:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:41,971 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 11:28:41,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 69 [2022-11-16 11:28:42,155 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 11:28:42,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:42,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569195828] [2022-11-16 11:28:42,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569195828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:42,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:42,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428460067] [2022-11-16 11:28:42,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:42,158 INFO L87 Difference]: Start difference. First operand 3751 states and 16574 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 11:28:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:42,504 INFO L93 Difference]: Finished difference Result 3750 states and 16571 transitions. [2022-11-16 11:28:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:42,505 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 11:28:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:42,536 INFO L225 Difference]: With dead ends: 3750 [2022-11-16 11:28:42,536 INFO L226 Difference]: Without dead ends: 3750 [2022-11-16 11:28:42,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:42,538 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:42,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-16 11:28:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-11-16 11:28:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3750. [2022-11-16 11:28:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 3349 states have (on average 4.948044192296208) internal successors, (16571), 3749 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 16571 transitions. [2022-11-16 11:28:42,722 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 16571 transitions. Word has length 3 [2022-11-16 11:28:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:42,723 INFO L495 AbstractCegarLoop]: Abstraction has 3750 states and 16571 transitions. [2022-11-16 11:28:42,723 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 11:28:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 16571 transitions. [2022-11-16 11:28:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:28:42,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:42,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:28:42,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:28:42,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:42,935 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1191420, now seen corresponding path program 1 times [2022-11-16 11:28:42,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:42,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567735280] [2022-11-16 11:28:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:42,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:42,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:42,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:42,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 11:28:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:28:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:43,357 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:28:43,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:28:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:43,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:43,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:43,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567735280] [2022-11-16 11:28:43,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567735280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:43,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:43,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:28:43,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12238627] [2022-11-16 11:28:43,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:43,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:28:43,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:43,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:28:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:43,747 INFO L87 Difference]: Start difference. First operand 3750 states and 16571 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:44,957 INFO L93 Difference]: Finished difference Result 11237 states and 49688 transitions. [2022-11-16 11:28:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:28:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:28:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:45,094 INFO L225 Difference]: With dead ends: 11237 [2022-11-16 11:28:45,094 INFO L226 Difference]: Without dead ends: 11237 [2022-11-16 11:28:45,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:28:45,096 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:45,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:28:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11237 states. [2022-11-16 11:28:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11237 to 3751. [2022-11-16 11:28:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3350 states have (on average 4.946865671641791) internal successors, (16572), 3750 states have internal predecessors, (16572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 16572 transitions. [2022-11-16 11:28:45,588 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 16572 transitions. Word has length 3 [2022-11-16 11:28:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:45,588 INFO L495 AbstractCegarLoop]: Abstraction has 3751 states and 16572 transitions. [2022-11-16 11:28:45,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 16572 transitions. [2022-11-16 11:28:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:28:45,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:45,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:28:45,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:28:45,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:45,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash 36992668, now seen corresponding path program 1 times [2022-11-16 11:28:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544569779] [2022-11-16 11:28:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:45,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:45,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:45,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 11:28:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:45,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:28:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:46,287 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-16 11:28:46,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2022-11-16 11:28:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:46,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:46,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544569779] [2022-11-16 11:28:46,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544569779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:46,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:46,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:46,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005820410] [2022-11-16 11:28:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:46,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:46,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:46,439 INFO L87 Difference]: Start difference. First operand 3751 states and 16572 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:47,325 INFO L93 Difference]: Finished difference Result 4577 states and 20598 transitions. [2022-11-16 11:28:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:47,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:28:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:47,365 INFO L225 Difference]: With dead ends: 4577 [2022-11-16 11:28:47,365 INFO L226 Difference]: Without dead ends: 4577 [2022-11-16 11:28:47,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:47,366 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:47,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:28:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4577 states. [2022-11-16 11:28:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4577 to 4229. [2022-11-16 11:28:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4229 states, 3828 states have (on average 5.129832810867294) internal successors, (19637), 4228 states have internal predecessors, (19637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 19637 transitions. [2022-11-16 11:28:47,662 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 19637 transitions. Word has length 4 [2022-11-16 11:28:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:47,663 INFO L495 AbstractCegarLoop]: Abstraction has 4229 states and 19637 transitions. [2022-11-16 11:28:47,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 19637 transitions. [2022-11-16 11:28:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:28:47,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:47,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:28:47,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:47,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:47,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash 36992669, now seen corresponding path program 1 times [2022-11-16 11:28:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:47,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800325164] [2022-11-16 11:28:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:47,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:47,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:47,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:47,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 11:28:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:48,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:28:48,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:48,213 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-16 11:28:48,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:28:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:48,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:48,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:48,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800325164] [2022-11-16 11:28:48,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800325164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:48,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:48,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:28:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71389943] [2022-11-16 11:28:48,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:48,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:48,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:48,254 INFO L87 Difference]: Start difference. First operand 4229 states and 19637 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:48,569 INFO L93 Difference]: Finished difference Result 2029 states and 9021 transitions. [2022-11-16 11:28:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:48,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:28:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:48,590 INFO L225 Difference]: With dead ends: 2029 [2022-11-16 11:28:48,590 INFO L226 Difference]: Without dead ends: 2029 [2022-11-16 11:28:48,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:48,591 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:48,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:28:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2022-11-16 11:28:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2022-11-16 11:28:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 1923 states have (on average 4.691107644305772) internal successors, (9021), 2028 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 9021 transitions. [2022-11-16 11:28:48,691 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 9021 transitions. Word has length 4 [2022-11-16 11:28:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:48,692 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 9021 transitions. [2022-11-16 11:28:48,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 9021 transitions. [2022-11-16 11:28:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:28:48,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:48,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:28:48,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:48,905 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash 36992718, now seen corresponding path program 1 times [2022-11-16 11:28:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:48,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288731672] [2022-11-16 11:28:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:48,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:48,907 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:48,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 11:28:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:49,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:28:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:49,187 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-16 11:28:49,188 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 62 [2022-11-16 11:28:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:49,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:49,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:49,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288731672] [2022-11-16 11:28:49,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288731672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:49,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:49,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:49,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866215413] [2022-11-16 11:28:49,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:49,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:49,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:49,430 INFO L87 Difference]: Start difference. First operand 2029 states and 9021 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:49,633 INFO L93 Difference]: Finished difference Result 2031 states and 9026 transitions. [2022-11-16 11:28:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:28:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:49,651 INFO L225 Difference]: With dead ends: 2031 [2022-11-16 11:28:49,651 INFO L226 Difference]: Without dead ends: 2031 [2022-11-16 11:28:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:49,652 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:49,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-16 11:28:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-11-16 11:28:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2022-11-16 11:28:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1925 states have (on average 4.688831168831169) internal successors, (9026), 2030 states have internal predecessors, (9026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 9026 transitions. [2022-11-16 11:28:49,767 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 9026 transitions. Word has length 4 [2022-11-16 11:28:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:49,767 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 9026 transitions. [2022-11-16 11:28:49,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 9026 transitions. [2022-11-16 11:28:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:28:49,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:49,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:28:49,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:49,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:49,982 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 36992719, now seen corresponding path program 1 times [2022-11-16 11:28:49,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:49,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663462965] [2022-11-16 11:28:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:49,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:49,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:49,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:49,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-16 11:28:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:50,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:28:50,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:50,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:50,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:50,335 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-11-16 11:28:50,335 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 11:28:50,390 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 11:28:50,391 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 11:28:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:50,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:50,515 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663462965] [2022-11-16 11:28:50,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663462965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:50,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:50,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203703925] [2022-11-16 11:28:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:50,517 INFO L87 Difference]: Start difference. First operand 2031 states and 9026 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:50,743 INFO L93 Difference]: Finished difference Result 2031 states and 9025 transitions. [2022-11-16 11:28:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:28:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:50,757 INFO L225 Difference]: With dead ends: 2031 [2022-11-16 11:28:50,758 INFO L226 Difference]: Without dead ends: 2031 [2022-11-16 11:28:50,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:50,758 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:50,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-16 11:28:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-11-16 11:28:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2022-11-16 11:28:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1925 states have (on average 4.688311688311688) internal successors, (9025), 2030 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 9025 transitions. [2022-11-16 11:28:50,870 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 9025 transitions. Word has length 4 [2022-11-16 11:28:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:50,870 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 9025 transitions. [2022-11-16 11:28:50,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 9025 transitions. [2022-11-16 11:28:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:50,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:50,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:28:50,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:28:51,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:51,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:51,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1146773777, now seen corresponding path program 1 times [2022-11-16 11:28:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:51,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208568543] [2022-11-16 11:28:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:51,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:51,088 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:51,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-16 11:28:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:28:51,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:51,491 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:28:51,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:28:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:51,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:51,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208568543] [2022-11-16 11:28:51,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208568543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:51,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:51,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137606767] [2022-11-16 11:28:51,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:51,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:51,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:51,645 INFO L87 Difference]: Start difference. First operand 2031 states and 9025 transitions. Second operand has 4 states, 4 states have (on average 1.25) 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 11:28:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:52,046 INFO L93 Difference]: Finished difference Result 2031 states and 9024 transitions. [2022-11-16 11:28:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:28:52,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 11:28:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:52,061 INFO L225 Difference]: With dead ends: 2031 [2022-11-16 11:28:52,061 INFO L226 Difference]: Without dead ends: 2031 [2022-11-16 11:28:52,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:52,062 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:52,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-11-16 11:28:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-11-16 11:28:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2022-11-16 11:28:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1925 states have (on average 4.687792207792207) internal successors, (9024), 2030 states have internal predecessors, (9024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 9024 transitions. [2022-11-16 11:28:52,171 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 9024 transitions. Word has length 5 [2022-11-16 11:28:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:52,172 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 9024 transitions. [2022-11-16 11:28:52,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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 11:28:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 9024 transitions. [2022-11-16 11:28:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:52,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:52,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:28:52,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:52,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:52,389 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1146776350, now seen corresponding path program 1 times [2022-11-16 11:28:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994345498] [2022-11-16 11:28:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:52,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:52,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:52,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 11:28:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:28:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:52,667 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-16 11:28:52,668 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 62 [2022-11-16 11:28:52,953 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 11:28:52,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:52,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994345498] [2022-11-16 11:28:52,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994345498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:52,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:52,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:52,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677909202] [2022-11-16 11:28:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:52,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:52,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:52,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:52,956 INFO L87 Difference]: Start difference. First operand 2031 states and 9024 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 11:28:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:53,215 INFO L93 Difference]: Finished difference Result 2032 states and 9026 transitions. [2022-11-16 11:28:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:53,216 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 11:28:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:53,228 INFO L225 Difference]: With dead ends: 2032 [2022-11-16 11:28:53,228 INFO L226 Difference]: Without dead ends: 2032 [2022-11-16 11:28:53,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:53,229 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:53,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-16 11:28:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2022-11-16 11:28:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2022-11-16 11:28:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 1926 states have (on average 4.686396677050882) internal successors, (9026), 2031 states have internal predecessors, (9026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 9026 transitions. [2022-11-16 11:28:53,318 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 9026 transitions. Word has length 5 [2022-11-16 11:28:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:53,318 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 9026 transitions. [2022-11-16 11:28:53,319 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 11:28:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 9026 transitions. [2022-11-16 11:28:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:53,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:53,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:28:53,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-16 11:28:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:53,530 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1146776351, now seen corresponding path program 1 times [2022-11-16 11:28:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:53,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240235669] [2022-11-16 11:28:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:53,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:53,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:53,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 11:28:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:53,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:28:53,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:53,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:53,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:53,912 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-11-16 11:28:53,913 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 11:28:53,985 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 11:28:53,986 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 139 treesize of output 138 [2022-11-16 11:28:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:54,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:54,148 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:54,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240235669] [2022-11-16 11:28:54,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240235669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:54,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:54,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:54,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447561091] [2022-11-16 11:28:54,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:54,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:54,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:54,151 INFO L87 Difference]: Start difference. First operand 2032 states and 9026 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 11:28:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:54,396 INFO L93 Difference]: Finished difference Result 2032 states and 9025 transitions. [2022-11-16 11:28:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:54,397 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 11:28:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:54,407 INFO L225 Difference]: With dead ends: 2032 [2022-11-16 11:28:54,407 INFO L226 Difference]: Without dead ends: 2032 [2022-11-16 11:28:54,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:54,408 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:54,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-16 11:28:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2022-11-16 11:28:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2022-11-16 11:28:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 1926 states have (on average 4.685877466251298) internal successors, (9025), 2031 states have internal predecessors, (9025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 9025 transitions. [2022-11-16 11:28:54,503 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 9025 transitions. Word has length 5 [2022-11-16 11:28:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:54,503 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 9025 transitions. [2022-11-16 11:28:54,503 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 11:28:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 9025 transitions. [2022-11-16 11:28:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:54,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:54,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:28:54,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:54,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:54,718 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1145158336, now seen corresponding path program 1 times [2022-11-16 11:28:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287705338] [2022-11-16 11:28:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:54,719 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 11:28:54,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:54,720 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:54,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 11:28:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:28:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:55,007 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-16 11:28:55,008 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 66 [2022-11-16 11:28:55,140 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 11:28:55,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:55,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:55,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287705338] [2022-11-16 11:28:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287705338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:55,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:55,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416536524] [2022-11-16 11:28:55,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:55,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:55,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:55,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:55,142 INFO L87 Difference]: Start difference. First operand 2032 states and 9025 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 11:28:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:55,376 INFO L93 Difference]: Finished difference Result 2031 states and 9022 transitions. [2022-11-16 11:28:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:55,376 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 11:28:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:55,384 INFO L225 Difference]: With dead ends: 2031 [2022-11-16 11:28:55,384 INFO L226 Difference]: Without dead ends: 2031 [2022-11-16 11:28:55,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:55,385 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:55,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-16 11:28:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-11-16 11:28:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2022-11-16 11:28:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1925 states have (on average 4.686753246753247) internal successors, (9022), 2030 states have internal predecessors, (9022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 9022 transitions. [2022-11-16 11:28:55,458 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 9022 transitions. Word has length 5 [2022-11-16 11:28:55,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:55,458 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 9022 transitions. [2022-11-16 11:28:55,458 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 11:28:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 9022 transitions. [2022-11-16 11:28:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:55,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:55,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:28:55,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:55,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:55,673 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:55,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1145158337, now seen corresponding path program 1 times [2022-11-16 11:28:55,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:55,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889576597] [2022-11-16 11:28:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:55,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:55,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:55,675 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:55,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 11:28:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:28:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:55,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:55,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:56,058 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:28:56,059 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 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:28:56,094 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:28:56,094 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 31 treesize of output 27 [2022-11-16 11:28:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:56,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:56,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889576597] [2022-11-16 11:28:56,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889576597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:56,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:56,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:28:56,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966539217] [2022-11-16 11:28:56,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:56,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:28:56,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:28:56,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:28:56,932 INFO L87 Difference]: Start difference. First operand 2031 states and 9022 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:57,509 INFO L93 Difference]: Finished difference Result 1964 states and 8712 transitions. [2022-11-16 11:28:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:28:57,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:28:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:57,516 INFO L225 Difference]: With dead ends: 1964 [2022-11-16 11:28:57,517 INFO L226 Difference]: Without dead ends: 1964 [2022-11-16 11:28:57,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:28:57,517 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:57,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 143 Unchecked, 0.4s Time] [2022-11-16 11:28:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-11-16 11:28:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1958. [2022-11-16 11:28:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1860 states have (on average 4.679569892473118) internal successors, (8704), 1957 states have internal predecessors, (8704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 8704 transitions. [2022-11-16 11:28:57,580 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 8704 transitions. Word has length 5 [2022-11-16 11:28:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:57,581 INFO L495 AbstractCegarLoop]: Abstraction has 1958 states and 8704 transitions. [2022-11-16 11:28:57,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 8704 transitions. [2022-11-16 11:28:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:28:57,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:57,582 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-16 11:28:57,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:57,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:57,794 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:57,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1145104495, now seen corresponding path program 2 times [2022-11-16 11:28:57,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:57,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266651131] [2022-11-16 11:28:57,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:28:57,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:57,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:57,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 11:28:57,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:28:57,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:57,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:28:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:57,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:57,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:57,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:57,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:58,172 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-16 11:28:58,173 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 11:28:58,226 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-16 11:28:58,227 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 11:28:58,323 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 11:28:58,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:58,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:58,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266651131] [2022-11-16 11:28:58,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266651131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:58,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:58,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:58,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766547285] [2022-11-16 11:28:58,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:58,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:58,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:58,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:58,325 INFO L87 Difference]: Start difference. First operand 1958 states and 8704 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 11:28:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:58,524 INFO L93 Difference]: Finished difference Result 1957 states and 8702 transitions. [2022-11-16 11:28:58,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:58,525 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 5 [2022-11-16 11:28:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:58,531 INFO L225 Difference]: With dead ends: 1957 [2022-11-16 11:28:58,531 INFO L226 Difference]: Without dead ends: 1957 [2022-11-16 11:28:58,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:58,532 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:58,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-16 11:28:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-11-16 11:28:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1957. [2022-11-16 11:28:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1860 states have (on average 4.678494623655914) internal successors, (8702), 1956 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:58,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 8702 transitions. [2022-11-16 11:28:58,595 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 8702 transitions. Word has length 5 [2022-11-16 11:28:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:58,596 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 8702 transitions. [2022-11-16 11:28:58,596 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 11:28:58,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 8702 transitions. [2022-11-16 11:28:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:28:58,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:58,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:28:58,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:58,803 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:58,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1190292596, now seen corresponding path program 1 times [2022-11-16 11:28:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:58,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107248334] [2022-11-16 11:28:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:58,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:58,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:58,804 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:58,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 11:28:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:28:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:59,055 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-16 11:28:59,056 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 51 [2022-11-16 11:28:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:59,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:59,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:59,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107248334] [2022-11-16 11:28:59,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107248334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:59,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:59,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:28:59,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944676483] [2022-11-16 11:28:59,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:59,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:59,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:59,278 INFO L87 Difference]: Start difference. First operand 1957 states and 8702 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 11:28:59,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:59,453 INFO L93 Difference]: Finished difference Result 1959 states and 8711 transitions. [2022-11-16 11:28:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:59,454 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 11:28:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:59,464 INFO L225 Difference]: With dead ends: 1959 [2022-11-16 11:28:59,464 INFO L226 Difference]: Without dead ends: 1959 [2022-11-16 11:28:59,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:59,465 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:59,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-16 11:28:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-11-16 11:28:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1959. [2022-11-16 11:28:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1862 states have (on average 4.678302900107411) internal successors, (8711), 1958 states have internal predecessors, (8711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 8711 transitions. [2022-11-16 11:28:59,535 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 8711 transitions. Word has length 6 [2022-11-16 11:28:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:59,535 INFO L495 AbstractCegarLoop]: Abstraction has 1959 states and 8711 transitions. [2022-11-16 11:28:59,535 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 11:28:59,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 8711 transitions. [2022-11-16 11:28:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:28:59,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:59,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:28:59,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:59,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:59,751 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:28:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1190292597, now seen corresponding path program 1 times [2022-11-16 11:28:59,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:59,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167235124] [2022-11-16 11:28:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:59,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:59,754 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:59,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 11:28:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:28:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:28:59,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:00,190 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-16 11:29:00,190 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 11:29:00,224 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 510 treesize of output 494 [2022-11-16 11:29:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:00,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:00,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167235124] [2022-11-16 11:29:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167235124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:00,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160169014] [2022-11-16 11:29:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:00,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:00,408 INFO L87 Difference]: Start difference. First operand 1959 states and 8711 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 11:29:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:00,583 INFO L93 Difference]: Finished difference Result 1959 states and 8710 transitions. [2022-11-16 11:29:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:00,583 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 11:29:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:00,590 INFO L225 Difference]: With dead ends: 1959 [2022-11-16 11:29:00,590 INFO L226 Difference]: Without dead ends: 1959 [2022-11-16 11:29:00,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:00,591 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:00,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-16 11:29:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-11-16 11:29:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1959. [2022-11-16 11:29:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1862 states have (on average 4.677765843179377) internal successors, (8710), 1958 states have internal predecessors, (8710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 8710 transitions. [2022-11-16 11:29:00,654 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 8710 transitions. Word has length 6 [2022-11-16 11:29:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:00,654 INFO L495 AbstractCegarLoop]: Abstraction has 1959 states and 8710 transitions. [2022-11-16 11:29:00,654 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 11:29:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 8710 transitions. [2022-11-16 11:29:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:29:00,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:00,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:29:00,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:00,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:00,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1140169567, now seen corresponding path program 1 times [2022-11-16 11:29:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083873212] [2022-11-16 11:29:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:00,869 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 11:29:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:00,870 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:00,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 11:29:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:29:01,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:01,281 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:01,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:29:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:01,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:01,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083873212] [2022-11-16 11:29:01,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083873212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:01,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:01,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-16 11:29:01,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182553442] [2022-11-16 11:29:01,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:01,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:29:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:29:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:29:01,638 INFO L87 Difference]: Start difference. First operand 1959 states and 8710 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:03,479 INFO L93 Difference]: Finished difference Result 2473 states and 10448 transitions. [2022-11-16 11:29:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:29:03,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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 6 [2022-11-16 11:29:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:03,488 INFO L225 Difference]: With dead ends: 2473 [2022-11-16 11:29:03,488 INFO L226 Difference]: Without dead ends: 2473 [2022-11-16 11:29:03,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:29:03,489 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:03,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 240 Invalid, 0 Unknown, 41 Unchecked, 1.7s Time] [2022-11-16 11:29:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-11-16 11:29:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2259. [2022-11-16 11:29:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2162 states have (on average 4.563367252543941) internal successors, (9866), 2258 states have internal predecessors, (9866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 9866 transitions. [2022-11-16 11:29:03,564 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 9866 transitions. Word has length 6 [2022-11-16 11:29:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:03,565 INFO L495 AbstractCegarLoop]: Abstraction has 2259 states and 9866 transitions. [2022-11-16 11:29:03,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 9866 transitions. [2022-11-16 11:29:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:29:03,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:03,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:29:03,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:03,779 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1140172140, now seen corresponding path program 1 times [2022-11-16 11:29:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163639510] [2022-11-16 11:29:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:03,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:03,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:03,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-16 11:29:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:03,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:04,048 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-16 11:29:04,049 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 62 [2022-11-16 11:29:04,311 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 11:29:04,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:04,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:04,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163639510] [2022-11-16 11:29:04,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163639510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:04,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:04,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170155159] [2022-11-16 11:29:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:04,313 INFO L87 Difference]: Start difference. First operand 2259 states and 9866 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 11:29:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:04,528 INFO L93 Difference]: Finished difference Result 2255 states and 9852 transitions. [2022-11-16 11:29:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:04,528 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 11:29:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:04,536 INFO L225 Difference]: With dead ends: 2255 [2022-11-16 11:29:04,537 INFO L226 Difference]: Without dead ends: 2255 [2022-11-16 11:29:04,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:04,538 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:04,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-16 11:29:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2022-11-16 11:29:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 2255. [2022-11-16 11:29:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2160 states have (on average 4.561111111111111) internal successors, (9852), 2254 states have internal predecessors, (9852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 9852 transitions. [2022-11-16 11:29:04,619 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 9852 transitions. Word has length 6 [2022-11-16 11:29:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:04,619 INFO L495 AbstractCegarLoop]: Abstraction has 2255 states and 9852 transitions. [2022-11-16 11:29:04,619 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 11:29:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 9852 transitions. [2022-11-16 11:29:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:29:04,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:04,620 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:29:04,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:04,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:04,833 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:04,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1138500106, now seen corresponding path program 2 times [2022-11-16 11:29:04,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:04,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446967001] [2022-11-16 11:29:04,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:29:04,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:04,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:04,835 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:04,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 11:29:05,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:29:05,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:05,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:29:05,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:05,243 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:05,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:05,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:06,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:06,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446967001] [2022-11-16 11:29:06,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446967001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:06,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:06,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:29:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262687543] [2022-11-16 11:29:06,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:06,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:29:06,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:29:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:06,134 INFO L87 Difference]: Start difference. First operand 2255 states and 9852 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:13,556 INFO L93 Difference]: Finished difference Result 17940 states and 79669 transitions. [2022-11-16 11:29:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:29:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:29:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:13,646 INFO L225 Difference]: With dead ends: 17940 [2022-11-16 11:29:13,646 INFO L226 Difference]: Without dead ends: 17940 [2022-11-16 11:29:13,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:29:13,647 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1305 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:13,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1305 Valid, 0 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-16 11:29:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17940 states. [2022-11-16 11:29:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17940 to 2261. [2022-11-16 11:29:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2166 states have (on average 4.554016620498615) internal successors, (9864), 2260 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 9864 transitions. [2022-11-16 11:29:13,859 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 9864 transitions. Word has length 6 [2022-11-16 11:29:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:13,859 INFO L495 AbstractCegarLoop]: Abstraction has 2261 states and 9864 transitions. [2022-11-16 11:29:13,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 9864 transitions. [2022-11-16 11:29:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:29:13,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:13,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:13,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:29:14,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:14,060 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1755633936, now seen corresponding path program 1 times [2022-11-16 11:29:14,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:14,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970314279] [2022-11-16 11:29:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:14,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:14,062 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:14,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 11:29:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:29:14,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:14,311 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-11-16 11:29:14,311 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 55 [2022-11-16 11:29:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:14,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:14,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:14,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970314279] [2022-11-16 11:29:14,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970314279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:14,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:14,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:14,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278623502] [2022-11-16 11:29:14,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:14,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:14,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:14,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:14,357 INFO L87 Difference]: Start difference. First operand 2261 states and 9864 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 11:29:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:14,588 INFO L93 Difference]: Finished difference Result 2224 states and 9753 transitions. [2022-11-16 11:29:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:14,588 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 11:29:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:14,596 INFO L225 Difference]: With dead ends: 2224 [2022-11-16 11:29:14,596 INFO L226 Difference]: Without dead ends: 2224 [2022-11-16 11:29:14,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:14,597 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:14,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:29:14,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2022-11-16 11:29:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2224. [2022-11-16 11:29:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2137 states have (on average 4.5638745905474964) internal successors, (9753), 2223 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 9753 transitions. [2022-11-16 11:29:14,654 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 9753 transitions. Word has length 7 [2022-11-16 11:29:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:14,655 INFO L495 AbstractCegarLoop]: Abstraction has 2224 states and 9753 transitions. [2022-11-16 11:29:14,655 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 11:29:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 9753 transitions. [2022-11-16 11:29:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:29:14,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:14,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:14,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:14,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:14,856 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1755633935, now seen corresponding path program 1 times [2022-11-16 11:29:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359188758] [2022-11-16 11:29:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:14,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:14,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:14,859 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:14,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 11:29:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:29:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:15,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:15,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:15,284 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:29:15,284 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 11:29:15,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:29:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:15,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:15,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359188758] [2022-11-16 11:29:15,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359188758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:15,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:15,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250071988] [2022-11-16 11:29:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:15,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:15,451 INFO L87 Difference]: Start difference. First operand 2224 states and 9753 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 11:29:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:15,629 INFO L93 Difference]: Finished difference Result 2223 states and 9751 transitions. [2022-11-16 11:29:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:15,630 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 11:29:15,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:15,637 INFO L225 Difference]: With dead ends: 2223 [2022-11-16 11:29:15,638 INFO L226 Difference]: Without dead ends: 2223 [2022-11-16 11:29:15,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:15,638 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:15,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-16 11:29:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2022-11-16 11:29:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2223. [2022-11-16 11:29:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2136 states have (on average 4.565074906367041) internal successors, (9751), 2222 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 9751 transitions. [2022-11-16 11:29:15,697 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 9751 transitions. Word has length 7 [2022-11-16 11:29:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:15,697 INFO L495 AbstractCegarLoop]: Abstraction has 2223 states and 9751 transitions. [2022-11-16 11:29:15,697 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 11:29:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 9751 transitions. [2022-11-16 11:29:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:29:15,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:15,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:15,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:15,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:15,911 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1755633904, now seen corresponding path program 1 times [2022-11-16 11:29:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:15,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353698484] [2022-11-16 11:29:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:15,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:15,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:15,913 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:15,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 11:29:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:29:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:16,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:16,320 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:29:16,320 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 11:29:16,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:29:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:16,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:16,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:16,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353698484] [2022-11-16 11:29:16,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353698484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:16,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:16,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:16,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516401701] [2022-11-16 11:29:16,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:16,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:16,473 INFO L87 Difference]: Start difference. First operand 2223 states and 9751 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 11:29:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:16,657 INFO L93 Difference]: Finished difference Result 2222 states and 9749 transitions. [2022-11-16 11:29:16,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:16,658 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 11:29:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:16,666 INFO L225 Difference]: With dead ends: 2222 [2022-11-16 11:29:16,666 INFO L226 Difference]: Without dead ends: 2222 [2022-11-16 11:29:16,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:16,667 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:16,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-16 11:29:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-11-16 11:29:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2222. [2022-11-16 11:29:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2135 states have (on average 4.566276346604216) internal successors, (9749), 2221 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 9749 transitions. [2022-11-16 11:29:16,776 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 9749 transitions. Word has length 7 [2022-11-16 11:29:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:16,776 INFO L495 AbstractCegarLoop]: Abstraction has 2222 states and 9749 transitions. [2022-11-16 11:29:16,776 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 11:29:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 9749 transitions. [2022-11-16 11:29:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:29:16,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:16,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:16,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:16,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:16,996 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 985562087, now seen corresponding path program 1 times [2022-11-16 11:29:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:16,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064241890] [2022-11-16 11:29:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:16,999 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:17,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 11:29:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:29:17,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:17,447 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-16 11:29:17,448 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-16 11:29:17,470 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 60 treesize of output 58 [2022-11-16 11:29:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:17,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:18,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:18,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064241890] [2022-11-16 11:29:18,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064241890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:18,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:18,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:29:18,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753286790] [2022-11-16 11:29:18,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:18,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:29:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:18,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:29:18,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:29:18,109 INFO L87 Difference]: Start difference. First operand 2222 states and 9749 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 11:29:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:18,915 INFO L93 Difference]: Finished difference Result 4086 states and 18193 transitions. [2022-11-16 11:29:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:29:18,916 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 11:29:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:18,933 INFO L225 Difference]: With dead ends: 4086 [2022-11-16 11:29:18,934 INFO L226 Difference]: Without dead ends: 4086 [2022-11-16 11:29:18,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:29:18,934 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:18,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2022-11-16 11:29:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2022-11-16 11:29:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2231. [2022-11-16 11:29:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2148 states have (on average 4.549348230912477) internal successors, (9772), 2230 states have internal predecessors, (9772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 9772 transitions. [2022-11-16 11:29:19,007 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 9772 transitions. Word has length 7 [2022-11-16 11:29:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:19,008 INFO L495 AbstractCegarLoop]: Abstraction has 2231 states and 9772 transitions. [2022-11-16 11:29:19,008 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 11:29:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 9772 transitions. [2022-11-16 11:29:19,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:29:19,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:19,008 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-16 11:29:19,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:19,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:19,209 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:19,210 INFO L85 PathProgramCache]: Analyzing trace with hash 933823617, now seen corresponding path program 2 times [2022-11-16 11:29:19,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:19,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398884458] [2022-11-16 11:29:19,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:29:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:19,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:19,211 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:19,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 11:29:19,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:29:19,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:19,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:19,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:19,591 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-16 11:29:19,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-16 11:29:19,639 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:29:19,639 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 31 treesize of output 27 [2022-11-16 11:29:19,778 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 11:29:19,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:19,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:19,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398884458] [2022-11-16 11:29:19,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398884458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:19,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:19,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937413531] [2022-11-16 11:29:19,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:19,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:19,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:19,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:19,780 INFO L87 Difference]: Start difference. First operand 2231 states and 9772 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 11:29:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:19,997 INFO L93 Difference]: Finished difference Result 2230 states and 9769 transitions. [2022-11-16 11:29:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:19,998 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 7 [2022-11-16 11:29:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:20,007 INFO L225 Difference]: With dead ends: 2230 [2022-11-16 11:29:20,007 INFO L226 Difference]: Without dead ends: 2230 [2022-11-16 11:29:20,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:20,008 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:20,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-16 11:29:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2022-11-16 11:29:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2230. [2022-11-16 11:29:20,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2147 states have (on average 4.550069864927806) internal successors, (9769), 2229 states have internal predecessors, (9769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9769 transitions. [2022-11-16 11:29:20,084 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9769 transitions. Word has length 7 [2022-11-16 11:29:20,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:20,084 INFO L495 AbstractCegarLoop]: Abstraction has 2230 states and 9769 transitions. [2022-11-16 11:29:20,084 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 11:29:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9769 transitions. [2022-11-16 11:29:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:29:20,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:20,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:20,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:20,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:20,298 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1409912868, now seen corresponding path program 1 times [2022-11-16 11:29:20,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:20,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644221962] [2022-11-16 11:29:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:20,300 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 11:29:20,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:20,301 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:20,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 11:29:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:29:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:20,721 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-16 11:29:20,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2022-11-16 11:29:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:20,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:20,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644221962] [2022-11-16 11:29:20,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644221962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:20,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:20,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89289999] [2022-11-16 11:29:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:20,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:20,933 INFO L87 Difference]: Start difference. First operand 2230 states and 9769 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:21,502 INFO L93 Difference]: Finished difference Result 2848 states and 12487 transitions. [2022-11-16 11:29:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:29:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:29:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:21,513 INFO L225 Difference]: With dead ends: 2848 [2022-11-16 11:29:21,513 INFO L226 Difference]: Without dead ends: 2848 [2022-11-16 11:29:21,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:29:21,514 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:21,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:29:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2022-11-16 11:29:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2690. [2022-11-16 11:29:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2607 states have (on average 4.645186037591101) internal successors, (12110), 2689 states have internal predecessors, (12110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 12110 transitions. [2022-11-16 11:29:21,595 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 12110 transitions. Word has length 8 [2022-11-16 11:29:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:21,595 INFO L495 AbstractCegarLoop]: Abstraction has 2690 states and 12110 transitions. [2022-11-16 11:29:21,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 12110 transitions. [2022-11-16 11:29:21,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:29:21,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:21,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:21,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:21,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:21,809 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:21,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1409912918, now seen corresponding path program 1 times [2022-11-16 11:29:21,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:21,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376802251] [2022-11-16 11:29:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:21,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:21,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:21,810 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 11:29:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:29:21,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:22,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:22,129 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:29:22,129 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 11:29:22,138 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 11:29:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:22,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:22,178 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:22,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376802251] [2022-11-16 11:29:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376802251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:22,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:22,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246254950] [2022-11-16 11:29:22,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:22,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:22,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:22,180 INFO L87 Difference]: Start difference. First operand 2690 states and 12110 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 11:29:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:22,395 INFO L93 Difference]: Finished difference Result 2575 states and 11615 transitions. [2022-11-16 11:29:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:22,395 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 11:29:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:22,405 INFO L225 Difference]: With dead ends: 2575 [2022-11-16 11:29:22,405 INFO L226 Difference]: Without dead ends: 2575 [2022-11-16 11:29:22,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:22,406 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:22,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:29:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2022-11-16 11:29:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 2575. [2022-11-16 11:29:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2502 states have (on average 4.64228617106315) internal successors, (11615), 2574 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:22,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 11615 transitions. [2022-11-16 11:29:22,496 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 11615 transitions. Word has length 8 [2022-11-16 11:29:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:22,497 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 11615 transitions. [2022-11-16 11:29:22,497 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 11:29:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 11615 transitions. [2022-11-16 11:29:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:29:22,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:22,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:22,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:22,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:22,700 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:22,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1409912919, now seen corresponding path program 1 times [2022-11-16 11:29:22,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:22,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040330557] [2022-11-16 11:29:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:22,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:22,702 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:22,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-16 11:29:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:29:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:23,022 INFO L321 Elim1Store]: treesize reduction 154, result has 27.7 percent of original size [2022-11-16 11:29:23,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 66 [2022-11-16 11:29:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:23,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:23,057 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:23,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040330557] [2022-11-16 11:29:23,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040330557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:23,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:23,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:23,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066253992] [2022-11-16 11:29:23,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:23,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:23,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:23,059 INFO L87 Difference]: Start difference. First operand 2575 states and 11615 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 11:29:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:23,274 INFO L93 Difference]: Finished difference Result 2460 states and 11120 transitions. [2022-11-16 11:29:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:23,275 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 11:29:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:23,283 INFO L225 Difference]: With dead ends: 2460 [2022-11-16 11:29:23,283 INFO L226 Difference]: Without dead ends: 2460 [2022-11-16 11:29:23,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:23,284 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:23,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:29:23,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2022-11-16 11:29:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2460. [2022-11-16 11:29:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2397 states have (on average 4.639132248644138) internal successors, (11120), 2459 states have internal predecessors, (11120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 11120 transitions. [2022-11-16 11:29:23,361 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 11120 transitions. Word has length 8 [2022-11-16 11:29:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:23,361 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 11120 transitions. [2022-11-16 11:29:23,362 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 11:29:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 11120 transitions. [2022-11-16 11:29:23,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:29:23,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:23,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:23,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:23,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:23,575 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:23,575 INFO L85 PathProgramCache]: Analyzing trace with hash 487653032, now seen corresponding path program 1 times [2022-11-16 11:29:23,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:23,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690022903] [2022-11-16 11:29:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:23,576 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 11:29:23,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:23,577 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:23,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 11:29:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:29:23,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:23,966 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:23,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:24,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:24,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690022903] [2022-11-16 11:29:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690022903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:24,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:24,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:29:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30383969] [2022-11-16 11:29:24,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:24,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:29:24,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:29:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:29:24,735 INFO L87 Difference]: Start difference. First operand 2460 states and 11120 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:26,039 INFO L93 Difference]: Finished difference Result 2659 states and 11689 transitions. [2022-11-16 11:29:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:29:26,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 11:29:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:26,049 INFO L225 Difference]: With dead ends: 2659 [2022-11-16 11:29:26,049 INFO L226 Difference]: Without dead ends: 2659 [2022-11-16 11:29:26,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:29:26,050 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:26,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 57 Unchecked, 1.0s Time] [2022-11-16 11:29:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2022-11-16 11:29:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2462. [2022-11-16 11:29:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2399 states have (on average 4.638182576073364) internal successors, (11127), 2461 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 11127 transitions. [2022-11-16 11:29:26,147 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 11127 transitions. Word has length 8 [2022-11-16 11:29:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:26,147 INFO L495 AbstractCegarLoop]: Abstraction has 2462 states and 11127 transitions. [2022-11-16 11:29:26,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 11127 transitions. [2022-11-16 11:29:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:29:26,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:26,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:26,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:26,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:26,363 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:26,364 INFO L85 PathProgramCache]: Analyzing trace with hash 487652220, now seen corresponding path program 1 times [2022-11-16 11:29:26,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:26,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687643403] [2022-11-16 11:29:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:26,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:26,366 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:26,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 11:29:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:29:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:26,736 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:26,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:26,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:27,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687643403] [2022-11-16 11:29:27,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687643403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:27,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:27,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:29:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996557467] [2022-11-16 11:29:27,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:27,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:29:27,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:27,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:29:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:29:27,600 INFO L87 Difference]: Start difference. First operand 2462 states and 11127 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:28,914 INFO L93 Difference]: Finished difference Result 2659 states and 11687 transitions. [2022-11-16 11:29:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:29:28,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 11:29:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:28,925 INFO L225 Difference]: With dead ends: 2659 [2022-11-16 11:29:28,925 INFO L226 Difference]: Without dead ends: 2659 [2022-11-16 11:29:28,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:29:28,926 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:28,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 53 Unchecked, 1.1s Time] [2022-11-16 11:29:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2022-11-16 11:29:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2462. [2022-11-16 11:29:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2399 states have (on average 4.637348895373072) internal successors, (11125), 2461 states have internal predecessors, (11125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 11125 transitions. [2022-11-16 11:29:28,977 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 11125 transitions. Word has length 8 [2022-11-16 11:29:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:28,977 INFO L495 AbstractCegarLoop]: Abstraction has 2462 states and 11125 transitions. [2022-11-16 11:29:28,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 11125 transitions. [2022-11-16 11:29:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:29:28,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:28,978 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:28,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-16 11:29:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:29,186 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:29,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1066165765, now seen corresponding path program 1 times [2022-11-16 11:29:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:29,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58902239] [2022-11-16 11:29:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:29,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:29,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:29,188 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:29,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 11:29:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:29,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:29:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:29,578 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-16 11:29:29,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 22 treesize of output 64 [2022-11-16 11:29:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:29:29,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:29:30,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:30,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58902239] [2022-11-16 11:29:30,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58902239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:30,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:30,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:29:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356618219] [2022-11-16 11:29:30,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:29:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:29:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:29:30,328 INFO L87 Difference]: Start difference. First operand 2462 states and 11125 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 11:29:33,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:29:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:35,688 INFO L93 Difference]: Finished difference Result 5760 states and 25465 transitions. [2022-11-16 11:29:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:29:35,689 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 8 [2022-11-16 11:29:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:35,713 INFO L225 Difference]: With dead ends: 5760 [2022-11-16 11:29:35,713 INFO L226 Difference]: Without dead ends: 5760 [2022-11-16 11:29:35,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:35,714 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 360 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:35,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 0 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-16 11:29:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2022-11-16 11:29:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4962. [2022-11-16 11:29:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4962 states, 4899 states have (on average 4.737497448458869) internal successors, (23209), 4961 states have internal predecessors, (23209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4962 states to 4962 states and 23209 transitions. [2022-11-16 11:29:35,845 INFO L78 Accepts]: Start accepts. Automaton has 4962 states and 23209 transitions. Word has length 8 [2022-11-16 11:29:35,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:35,846 INFO L495 AbstractCegarLoop]: Abstraction has 4962 states and 23209 transitions. [2022-11-16 11:29:35,846 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 11:29:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4962 states and 23209 transitions. [2022-11-16 11:29:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:29:35,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:35,847 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-16 11:29:35,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:29:36,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:36,048 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1116239456, now seen corresponding path program 1 times [2022-11-16 11:29:36,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:36,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269151021] [2022-11-16 11:29:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:36,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:36,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:36,050 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:36,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-16 11:29:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:29:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:36,510 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:29:36,510 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 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:29:36,543 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:29:36,544 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 31 treesize of output 27 [2022-11-16 11:29:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:37,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:37,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269151021] [2022-11-16 11:29:37,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269151021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:37,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:37,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:29:37,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013922294] [2022-11-16 11:29:37,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:37,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:29:37,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:29:37,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:37,830 INFO L87 Difference]: Start difference. First operand 4962 states and 23209 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:39,304 INFO L93 Difference]: Finished difference Result 9616 states and 45157 transitions. [2022-11-16 11:29:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:29:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 11:29:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:39,358 INFO L225 Difference]: With dead ends: 9616 [2022-11-16 11:29:39,358 INFO L226 Difference]: Without dead ends: 9616 [2022-11-16 11:29:39,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:29:39,359 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 187 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:39,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 0 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 202 Invalid, 0 Unknown, 335 Unchecked, 0.9s Time] [2022-11-16 11:29:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9616 states. [2022-11-16 11:29:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9616 to 4978. [2022-11-16 11:29:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4915 states have (on average 4.728382502543235) internal successors, (23240), 4977 states have internal predecessors, (23240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:39,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 23240 transitions. [2022-11-16 11:29:39,635 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 23240 transitions. Word has length 8 [2022-11-16 11:29:39,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:39,635 INFO L495 AbstractCegarLoop]: Abstraction has 4978 states and 23240 transitions. [2022-11-16 11:29:39,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:39,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 23240 transitions. [2022-11-16 11:29:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:29:39,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:39,636 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:39,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-16 11:29:39,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:39,836 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash -243640921, now seen corresponding path program 2 times [2022-11-16 11:29:39,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:39,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195063430] [2022-11-16 11:29:39,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:29:39,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:39,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:39,838 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:39,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 11:29:40,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:29:40,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:40,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:29:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:40,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:40,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:40,201 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:29:40,201 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 11:29:40,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:29:40,383 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 11:29:40,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:40,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:40,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195063430] [2022-11-16 11:29:40,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195063430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:40,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:40,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:29:40,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550147238] [2022-11-16 11:29:40,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:40,385 INFO L87 Difference]: Start difference. First operand 4978 states and 23240 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 11:29:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:40,561 INFO L93 Difference]: Finished difference Result 4977 states and 23235 transitions. [2022-11-16 11:29:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:40,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:29:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:40,579 INFO L225 Difference]: With dead ends: 4977 [2022-11-16 11:29:40,580 INFO L226 Difference]: Without dead ends: 4977 [2022-11-16 11:29:40,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:40,580 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 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 11:29:40,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-16 11:29:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-11-16 11:29:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4977. [2022-11-16 11:29:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4977 states, 4914 states have (on average 4.728327228327228) internal successors, (23235), 4976 states have internal predecessors, (23235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 23235 transitions. [2022-11-16 11:29:40,691 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 23235 transitions. Word has length 9 [2022-11-16 11:29:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:40,691 INFO L495 AbstractCegarLoop]: Abstraction has 4977 states and 23235 transitions. [2022-11-16 11:29:40,692 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 11:29:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 23235 transitions. [2022-11-16 11:29:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:29:40,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:40,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:40,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-16 11:29:40,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:40,895 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2011644944, now seen corresponding path program 1 times [2022-11-16 11:29:40,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:40,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978794017] [2022-11-16 11:29:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:40,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:40,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:40,896 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:40,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-16 11:29:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:41,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:29:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:41,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:41,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978794017] [2022-11-16 11:29:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978794017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:41,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:41,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:41,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664127518] [2022-11-16 11:29:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:41,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:29:41,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:29:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:41,075 INFO L87 Difference]: Start difference. First operand 4977 states and 23235 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:41,295 INFO L93 Difference]: Finished difference Result 4122 states and 18756 transitions. [2022-11-16 11:29:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:41,311 INFO L225 Difference]: With dead ends: 4122 [2022-11-16 11:29:41,311 INFO L226 Difference]: Without dead ends: 4122 [2022-11-16 11:29:41,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:29:41,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:41,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:29:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2022-11-16 11:29:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 4122. [2022-11-16 11:29:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4075 states have (on average 4.602699386503067) internal successors, (18756), 4121 states have internal predecessors, (18756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 18756 transitions. [2022-11-16 11:29:41,412 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 18756 transitions. Word has length 10 [2022-11-16 11:29:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:41,412 INFO L495 AbstractCegarLoop]: Abstraction has 4122 states and 18756 transitions. [2022-11-16 11:29:41,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 18756 transitions. [2022-11-16 11:29:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:29:41,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:41,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:41,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-16 11:29:41,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:41,613 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2011644945, now seen corresponding path program 1 times [2022-11-16 11:29:41,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:41,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976202707] [2022-11-16 11:29:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:41,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:41,615 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:41,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 11:29:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:29:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:41,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:41,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976202707] [2022-11-16 11:29:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976202707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:41,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:41,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:41,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347511310] [2022-11-16 11:29:41,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:41,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:41,847 INFO L87 Difference]: Start difference. First operand 4122 states and 18756 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:42,091 INFO L93 Difference]: Finished difference Result 3267 states and 14277 transitions. [2022-11-16 11:29:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:29:42,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:42,108 INFO L225 Difference]: With dead ends: 3267 [2022-11-16 11:29:42,108 INFO L226 Difference]: Without dead ends: 3267 [2022-11-16 11:29:42,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:42,109 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:42,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:29:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2022-11-16 11:29:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 3267. [2022-11-16 11:29:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3236 states have (on average 4.411928306551298) internal successors, (14277), 3266 states have internal predecessors, (14277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 14277 transitions. [2022-11-16 11:29:42,191 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 14277 transitions. Word has length 10 [2022-11-16 11:29:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:42,191 INFO L495 AbstractCegarLoop]: Abstraction has 3267 states and 14277 transitions. [2022-11-16 11:29:42,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 14277 transitions. [2022-11-16 11:29:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:29:42,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:42,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:42,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-16 11:29:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:42,394 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2011598213, now seen corresponding path program 1 times [2022-11-16 11:29:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:42,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180875813] [2022-11-16 11:29:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:42,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:42,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:42,396 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:42,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 11:29:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:42,812 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:42,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:29:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:43,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:43,008 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:43,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180875813] [2022-11-16 11:29:43,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180875813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:43,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:43,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:29:43,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371153004] [2022-11-16 11:29:43,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:43,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:43,010 INFO L87 Difference]: Start difference. First operand 3267 states and 14277 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:43,296 INFO L93 Difference]: Finished difference Result 3263 states and 14260 transitions. [2022-11-16 11:29:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:43,311 INFO L225 Difference]: With dead ends: 3263 [2022-11-16 11:29:43,312 INFO L226 Difference]: Without dead ends: 3263 [2022-11-16 11:29:43,312 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 11:29:43,313 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:43,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-16 11:29:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2022-11-16 11:29:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3263. [2022-11-16 11:29:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3232 states have (on average 4.412128712871287) internal successors, (14260), 3262 states have internal predecessors, (14260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 14260 transitions. [2022-11-16 11:29:43,386 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 14260 transitions. Word has length 10 [2022-11-16 11:29:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:43,386 INFO L495 AbstractCegarLoop]: Abstraction has 3263 states and 14260 transitions. [2022-11-16 11:29:43,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 14260 transitions. [2022-11-16 11:29:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:29:43,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:43,387 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:43,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:43,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:43,602 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1035734790, now seen corresponding path program 1 times [2022-11-16 11:29:43,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:43,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589873701] [2022-11-16 11:29:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:43,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:43,604 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:43,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-16 11:29:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:29:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:43,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:43,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:43,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:44,064 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:29:44,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:29:44,083 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 18 treesize of output 16 [2022-11-16 11:29:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:44,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:45,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589873701] [2022-11-16 11:29:45,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589873701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:45,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:45,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:29:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468693827] [2022-11-16 11:29:45,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:29:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:29:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:45,466 INFO L87 Difference]: Start difference. First operand 3263 states and 14260 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:47,099 INFO L93 Difference]: Finished difference Result 6328 states and 27785 transitions. [2022-11-16 11:29:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:29:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:29:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:47,123 INFO L225 Difference]: With dead ends: 6328 [2022-11-16 11:29:47,123 INFO L226 Difference]: Without dead ends: 6328 [2022-11-16 11:29:47,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:29:47,124 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:47,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 0 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 231 Invalid, 0 Unknown, 350 Unchecked, 1.1s Time] [2022-11-16 11:29:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2022-11-16 11:29:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 3247. [2022-11-16 11:29:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3216 states have (on average 4.424440298507463) internal successors, (14229), 3246 states have internal predecessors, (14229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 14229 transitions. [2022-11-16 11:29:47,241 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 14229 transitions. Word has length 10 [2022-11-16 11:29:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:47,241 INFO L495 AbstractCegarLoop]: Abstraction has 3247 states and 14229 transitions. [2022-11-16 11:29:47,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 14229 transitions. [2022-11-16 11:29:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:47,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:47,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:47,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:29:47,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:47,443 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1879841685, now seen corresponding path program 1 times [2022-11-16 11:29:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:47,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019468096] [2022-11-16 11:29:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:47,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:47,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:47,445 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:47,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-16 11:29:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:47,907 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:47,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:48,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:48,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:48,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019468096] [2022-11-16 11:29:48,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019468096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:48,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:48,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:29:48,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094399856] [2022-11-16 11:29:48,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:48,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:48,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:48,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:48,114 INFO L87 Difference]: Start difference. First operand 3247 states and 14229 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:48,397 INFO L93 Difference]: Finished difference Result 3243 states and 14216 transitions. [2022-11-16 11:29:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:48,409 INFO L225 Difference]: With dead ends: 3243 [2022-11-16 11:29:48,409 INFO L226 Difference]: Without dead ends: 3243 [2022-11-16 11:29:48,409 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 11:29:48,410 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:48,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:29:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2022-11-16 11:29:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3243. [2022-11-16 11:29:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 3212 states have (on average 4.425902864259029) internal successors, (14216), 3242 states have internal predecessors, (14216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 14216 transitions. [2022-11-16 11:29:48,477 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 14216 transitions. Word has length 11 [2022-11-16 11:29:48,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:48,477 INFO L495 AbstractCegarLoop]: Abstraction has 3243 states and 14216 transitions. [2022-11-16 11:29:48,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 14216 transitions. [2022-11-16 11:29:48,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:48,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:48,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:48,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-16 11:29:48,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:48,680 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1878918164, now seen corresponding path program 1 times [2022-11-16 11:29:48,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:48,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867005924] [2022-11-16 11:29:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:48,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:48,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:48,682 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:48,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 11:29:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:49,111 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:49,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:29:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:49,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:49,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:49,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867005924] [2022-11-16 11:29:49,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867005924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:49,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:49,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:29:49,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174704169] [2022-11-16 11:29:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:49,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:49,293 INFO L87 Difference]: Start difference. First operand 3243 states and 14216 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:49,555 INFO L93 Difference]: Finished difference Result 3239 states and 14203 transitions. [2022-11-16 11:29:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:49,567 INFO L225 Difference]: With dead ends: 3239 [2022-11-16 11:29:49,567 INFO L226 Difference]: Without dead ends: 3239 [2022-11-16 11:29:49,568 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 11:29:49,568 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:49,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:29:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-11-16 11:29:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3239. [2022-11-16 11:29:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3208 states have (on average 4.427369077306733) internal successors, (14203), 3238 states have internal predecessors, (14203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 14203 transitions. [2022-11-16 11:29:49,637 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 14203 transitions. Word has length 11 [2022-11-16 11:29:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:49,637 INFO L495 AbstractCegarLoop]: Abstraction has 3239 states and 14203 transitions. [2022-11-16 11:29:49,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 14203 transitions. [2022-11-16 11:29:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:49,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:49,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:49,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-16 11:29:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:49,841 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2063384036, now seen corresponding path program 1 times [2022-11-16 11:29:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:49,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831322454] [2022-11-16 11:29:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:49,843 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:49,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-16 11:29:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:50,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:50,301 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:50,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:29:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:50,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:50,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831322454] [2022-11-16 11:29:50,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831322454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:50,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:50,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:29:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173155768] [2022-11-16 11:29:50,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:50,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:50,507 INFO L87 Difference]: Start difference. First operand 3239 states and 14203 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:50,771 INFO L93 Difference]: Finished difference Result 3235 states and 14186 transitions. [2022-11-16 11:29:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:50,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:50,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:50,782 INFO L225 Difference]: With dead ends: 3235 [2022-11-16 11:29:50,782 INFO L226 Difference]: Without dead ends: 3235 [2022-11-16 11:29:50,783 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 11:29:50,783 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:50,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:29:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2022-11-16 11:29:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3235. [2022-11-16 11:29:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3204 states have (on average 4.427590511860175) internal successors, (14186), 3234 states have internal predecessors, (14186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 14186 transitions. [2022-11-16 11:29:50,857 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 14186 transitions. Word has length 11 [2022-11-16 11:29:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:50,858 INFO L495 AbstractCegarLoop]: Abstraction has 3235 states and 14186 transitions. [2022-11-16 11:29:50,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 14186 transitions. [2022-11-16 11:29:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:50,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:50,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:50,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-16 11:29:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:51,060 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2063515538, now seen corresponding path program 1 times [2022-11-16 11:29:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:51,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458722619] [2022-11-16 11:29:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:51,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:51,061 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:51,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-16 11:29:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:51,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:51,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:51,517 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:51,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:51,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:51,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:51,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458722619] [2022-11-16 11:29:51,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458722619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:51,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:51,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:29:51,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732204256] [2022-11-16 11:29:51,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:51,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:51,732 INFO L87 Difference]: Start difference. First operand 3235 states and 14186 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:52,027 INFO L93 Difference]: Finished difference Result 3235 states and 14185 transitions. [2022-11-16 11:29:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:52,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:52,037 INFO L225 Difference]: With dead ends: 3235 [2022-11-16 11:29:52,037 INFO L226 Difference]: Without dead ends: 3235 [2022-11-16 11:29:52,038 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 11:29:52,038 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:52,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:29:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2022-11-16 11:29:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3235. [2022-11-16 11:29:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3204 states have (on average 4.427278401997503) internal successors, (14185), 3234 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 14185 transitions. [2022-11-16 11:29:52,101 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 14185 transitions. Word has length 11 [2022-11-16 11:29:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:52,102 INFO L495 AbstractCegarLoop]: Abstraction has 3235 states and 14185 transitions. [2022-11-16 11:29:52,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 14185 transitions. [2022-11-16 11:29:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:52,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:52,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:52,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-16 11:29:52,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:52,306 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:52,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2063516468, now seen corresponding path program 1 times [2022-11-16 11:29:52,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:52,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651577540] [2022-11-16 11:29:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:52,309 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:52,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 11:29:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:52,709 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:52,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:52,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:29:52,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:52,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651577540] [2022-11-16 11:29:52,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651577540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:52,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:52,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:29:52,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571902861] [2022-11-16 11:29:52,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:52,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:29:52,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:29:52,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:29:52,912 INFO L87 Difference]: Start difference. First operand 3235 states and 14185 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:53,168 INFO L93 Difference]: Finished difference Result 3226 states and 14133 transitions. [2022-11-16 11:29:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:29:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:53,180 INFO L225 Difference]: With dead ends: 3226 [2022-11-16 11:29:53,180 INFO L226 Difference]: Without dead ends: 3226 [2022-11-16 11:29:53,180 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 11:29:53,180 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:53,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-16 11:29:53,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2022-11-16 11:29:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 3226. [2022-11-16 11:29:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3195 states have (on average 4.4234741784037555) internal successors, (14133), 3225 states have internal predecessors, (14133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 14133 transitions. [2022-11-16 11:29:53,250 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 14133 transitions. Word has length 11 [2022-11-16 11:29:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:53,251 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 14133 transitions. [2022-11-16 11:29:53,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 14133 transitions. [2022-11-16 11:29:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:53,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:53,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:53,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:53,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:53,452 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2136577015, now seen corresponding path program 1 times [2022-11-16 11:29:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927592179] [2022-11-16 11:29:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:53,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:53,454 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:53,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-16 11:29:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:29:53,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:53,858 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:53,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:29:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:54,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:54,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:54,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927592179] [2022-11-16 11:29:54,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927592179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:54,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:54,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:29:54,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069039300] [2022-11-16 11:29:54,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:54,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:29:54,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:54,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:29:54,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:29:54,700 INFO L87 Difference]: Start difference. First operand 3226 states and 14133 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:56,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:29:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:58,355 INFO L93 Difference]: Finished difference Result 3576 states and 15192 transitions. [2022-11-16 11:29:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:29:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:58,368 INFO L225 Difference]: With dead ends: 3576 [2022-11-16 11:29:58,368 INFO L226 Difference]: Without dead ends: 3576 [2022-11-16 11:29:58,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:58,369 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:58,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 52 Unchecked, 3.3s Time] [2022-11-16 11:29:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2022-11-16 11:29:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3379. [2022-11-16 11:29:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3348 states have (on average 4.389486260454002) internal successors, (14696), 3378 states have internal predecessors, (14696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 14696 transitions. [2022-11-16 11:29:58,443 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 14696 transitions. Word has length 11 [2022-11-16 11:29:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:58,443 INFO L495 AbstractCegarLoop]: Abstraction has 3379 states and 14696 transitions. [2022-11-16 11:29:58,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 14696 transitions. [2022-11-16 11:29:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:29:58,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:58,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:58,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-16 11:29:58,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:58,645 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:29:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1942784001, now seen corresponding path program 1 times [2022-11-16 11:29:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:58,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006032770] [2022-11-16 11:29:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:58,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:58,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:58,648 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:58,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-16 11:29:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:29:58,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:59,086 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:29:59,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:29:59,301 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 11:29:59,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:00,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:00,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006032770] [2022-11-16 11:30:00,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006032770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:00,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:00,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:30:00,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877817068] [2022-11-16 11:30:00,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:00,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:30:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:30:00,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:30:00,085 INFO L87 Difference]: Start difference. First operand 3379 states and 14696 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:02,034 INFO L93 Difference]: Finished difference Result 3556 states and 15164 transitions. [2022-11-16 11:30:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:02,048 INFO L225 Difference]: With dead ends: 3556 [2022-11-16 11:30:02,048 INFO L226 Difference]: Without dead ends: 3556 [2022-11-16 11:30:02,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:30:02,048 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:02,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 30 Unchecked, 1.7s Time] [2022-11-16 11:30:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2022-11-16 11:30:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3379. [2022-11-16 11:30:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3348 states have (on average 4.389187574671445) internal successors, (14695), 3378 states have internal predecessors, (14695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 14695 transitions. [2022-11-16 11:30:02,127 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 14695 transitions. Word has length 12 [2022-11-16 11:30:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:02,128 INFO L495 AbstractCegarLoop]: Abstraction has 3379 states and 14695 transitions. [2022-11-16 11:30:02,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 14695 transitions. [2022-11-16 11:30:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:02,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:02,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:02,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:02,330 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1994501177, now seen corresponding path program 1 times [2022-11-16 11:30:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:02,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680979818] [2022-11-16 11:30:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:02,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:02,332 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:02,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 11:30:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:30:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:02,741 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:30:02,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:30:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:02,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:03,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:03,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680979818] [2022-11-16 11:30:03,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680979818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:03,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:03,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:30:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341905028] [2022-11-16 11:30:03,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:03,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:30:03,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:30:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:30:03,612 INFO L87 Difference]: Start difference. First operand 3379 states and 14695 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:06,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:06,745 INFO L93 Difference]: Finished difference Result 3581 states and 15203 transitions. [2022-11-16 11:30:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:06,759 INFO L225 Difference]: With dead ends: 3581 [2022-11-16 11:30:06,759 INFO L226 Difference]: Without dead ends: 3581 [2022-11-16 11:30:06,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:30:06,762 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:06,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 33 Unchecked, 2.8s Time] [2022-11-16 11:30:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2022-11-16 11:30:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3384. [2022-11-16 11:30:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 3353 states have (on average 4.386221294363256) internal successors, (14707), 3383 states have internal predecessors, (14707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 14707 transitions. [2022-11-16 11:30:06,842 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 14707 transitions. Word has length 12 [2022-11-16 11:30:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:06,842 INFO L495 AbstractCegarLoop]: Abstraction has 3384 states and 14707 transitions. [2022-11-16 11:30:06,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 14707 transitions. [2022-11-16 11:30:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:06,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:06,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:06,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:07,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:07,060 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1995424698, now seen corresponding path program 1 times [2022-11-16 11:30:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:07,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138793467] [2022-11-16 11:30:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:07,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:07,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:07,062 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:07,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-16 11:30:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:07,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:30:07,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:07,576 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:30:07,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:30:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:07,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:08,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:08,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138793467] [2022-11-16 11:30:08,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138793467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:08,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:08,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:30:08,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513268105] [2022-11-16 11:30:08,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:30:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:08,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:30:08,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:30:08,479 INFO L87 Difference]: Start difference. First operand 3384 states and 14707 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:11,787 INFO L93 Difference]: Finished difference Result 3584 states and 15213 transitions. [2022-11-16 11:30:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:11,802 INFO L225 Difference]: With dead ends: 3584 [2022-11-16 11:30:11,802 INFO L226 Difference]: Without dead ends: 3584 [2022-11-16 11:30:11,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:30:11,802 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 232 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:11,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 0 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 0 Unknown, 80 Unchecked, 2.9s Time] [2022-11-16 11:30:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2022-11-16 11:30:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3387. [2022-11-16 11:30:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3356 states have (on average 4.385280095351609) internal successors, (14717), 3386 states have internal predecessors, (14717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 14717 transitions. [2022-11-16 11:30:11,876 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 14717 transitions. Word has length 12 [2022-11-16 11:30:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:11,876 INFO L495 AbstractCegarLoop]: Abstraction has 3387 states and 14717 transitions. [2022-11-16 11:30:11,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 14717 transitions. [2022-11-16 11:30:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:11,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:11,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:11,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:30:12,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:12,079 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1810958826, now seen corresponding path program 1 times [2022-11-16 11:30:12,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:12,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690891704] [2022-11-16 11:30:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:12,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:12,081 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:12,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-16 11:30:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:30:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:12,552 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:30:12,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:30:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:12,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:13,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690891704] [2022-11-16 11:30:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690891704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:13,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:13,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:30:13,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490275730] [2022-11-16 11:30:13,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:13,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:30:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:30:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:30:13,471 INFO L87 Difference]: Start difference. First operand 3387 states and 14717 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:14,922 INFO L93 Difference]: Finished difference Result 3545 states and 15165 transitions. [2022-11-16 11:30:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:14,936 INFO L225 Difference]: With dead ends: 3545 [2022-11-16 11:30:14,936 INFO L226 Difference]: Without dead ends: 3545 [2022-11-16 11:30:14,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:30:14,936 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 113 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:14,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 193 Invalid, 0 Unknown, 72 Unchecked, 1.2s Time] [2022-11-16 11:30:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2022-11-16 11:30:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3388. [2022-11-16 11:30:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3357 states have (on average 4.385761096216861) internal successors, (14723), 3387 states have internal predecessors, (14723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 14723 transitions. [2022-11-16 11:30:15,014 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 14723 transitions. Word has length 12 [2022-11-16 11:30:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:15,014 INFO L495 AbstractCegarLoop]: Abstraction has 3388 states and 14723 transitions. [2022-11-16 11:30:15,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 14723 transitions. [2022-11-16 11:30:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:15,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:15,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:15,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:15,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:15,217 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1810827324, now seen corresponding path program 1 times [2022-11-16 11:30:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181699921] [2022-11-16 11:30:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:15,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:15,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:15,219 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:15,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 11:30:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:30:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:15,718 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:30:15,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:30:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:15,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:16,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:16,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181699921] [2022-11-16 11:30:16,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181699921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:16,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:16,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:30:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484909281] [2022-11-16 11:30:16,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:16,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:30:16,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:30:16,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:30:16,698 INFO L87 Difference]: Start difference. First operand 3388 states and 14723 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:19,697 INFO L93 Difference]: Finished difference Result 3586 states and 15227 transitions. [2022-11-16 11:30:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:19,710 INFO L225 Difference]: With dead ends: 3586 [2022-11-16 11:30:19,710 INFO L226 Difference]: Without dead ends: 3586 [2022-11-16 11:30:19,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:30:19,711 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 232 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:19,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 0 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 37 Unchecked, 2.6s Time] [2022-11-16 11:30:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2022-11-16 11:30:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3389. [2022-11-16 11:30:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3358 states have (on average 4.3868374032162) internal successors, (14731), 3388 states have internal predecessors, (14731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 14731 transitions. [2022-11-16 11:30:19,823 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 14731 transitions. Word has length 12 [2022-11-16 11:30:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:19,823 INFO L495 AbstractCegarLoop]: Abstraction has 3389 states and 14731 transitions. [2022-11-16 11:30:19,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 14731 transitions. [2022-11-16 11:30:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:19,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:19,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:19,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-16 11:30:20,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:20,031 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1810826394, now seen corresponding path program 1 times [2022-11-16 11:30:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:20,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471414532] [2022-11-16 11:30:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:20,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:20,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:20,034 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:20,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 11:30:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:30:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:20,538 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:30:20,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:30:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:20,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:21,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:21,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471414532] [2022-11-16 11:30:21,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471414532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:21,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:21,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:30:21,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777184411] [2022-11-16 11:30:21,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:30:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:30:21,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:30:21,504 INFO L87 Difference]: Start difference. First operand 3389 states and 14731 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:23,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:24,645 INFO L93 Difference]: Finished difference Result 3650 states and 15610 transitions. [2022-11-16 11:30:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:30:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:24,659 INFO L225 Difference]: With dead ends: 3650 [2022-11-16 11:30:24,660 INFO L226 Difference]: Without dead ends: 3650 [2022-11-16 11:30:24,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:30:24,660 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:24,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 320 Invalid, 0 Unknown, 115 Unchecked, 2.8s Time] [2022-11-16 11:30:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2022-11-16 11:30:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 3453. [2022-11-16 11:30:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3422 states have (on average 4.416715371127995) internal successors, (15114), 3452 states have internal predecessors, (15114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 15114 transitions. [2022-11-16 11:30:24,738 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 15114 transitions. Word has length 12 [2022-11-16 11:30:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:24,738 INFO L495 AbstractCegarLoop]: Abstraction has 3453 states and 15114 transitions. [2022-11-16 11:30:24,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 15114 transitions. [2022-11-16 11:30:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:24,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:24,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:24,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:24,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:24,956 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1809618231, now seen corresponding path program 2 times [2022-11-16 11:30:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:24,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116152947] [2022-11-16 11:30:24,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:30:24,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:24,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:24,958 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:24,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-16 11:30:25,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:30:25,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:25,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:30:25,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:25,530 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:30:25,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:30:25,770 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 11:30:25,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:26,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:26,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116152947] [2022-11-16 11:30:26,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116152947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:26,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:26,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:30:26,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122731302] [2022-11-16 11:30:26,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:26,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:30:26,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:30:26,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:30:26,704 INFO L87 Difference]: Start difference. First operand 3453 states and 15114 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:28,378 INFO L93 Difference]: Finished difference Result 3608 states and 15542 transitions. [2022-11-16 11:30:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:30:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:28,394 INFO L225 Difference]: With dead ends: 3608 [2022-11-16 11:30:28,394 INFO L226 Difference]: Without dead ends: 3608 [2022-11-16 11:30:28,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:30:28,395 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:28,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 236 Invalid, 0 Unknown, 81 Unchecked, 1.3s Time] [2022-11-16 11:30:28,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-11-16 11:30:28,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3451. [2022-11-16 11:30:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3420 states have (on average 4.415204678362573) internal successors, (15100), 3450 states have internal predecessors, (15100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 15100 transitions. [2022-11-16 11:30:28,472 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 15100 transitions. Word has length 12 [2022-11-16 11:30:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:28,472 INFO L495 AbstractCegarLoop]: Abstraction has 3451 states and 15100 transitions. [2022-11-16 11:30:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 15100 transitions. [2022-11-16 11:30:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:28,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:28,474 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:28,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:28,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:28,690 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:28,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1715952581, now seen corresponding path program 2 times [2022-11-16 11:30:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:28,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006960913] [2022-11-16 11:30:28,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:30:28,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:28,692 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:28,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 11:30:28,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:30:28,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:28,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:30:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:29,267 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-16 11:30:29,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2022-11-16 11:30:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:29,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:30,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:30,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006960913] [2022-11-16 11:30:30,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006960913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:30,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:30,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:30:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214623351] [2022-11-16 11:30:30,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:30,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:30:30,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:30:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:30:30,571 INFO L87 Difference]: Start difference. First operand 3451 states and 15100 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:35,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:39,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:30:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:42,511 INFO L93 Difference]: Finished difference Result 11657 states and 50948 transitions. [2022-11-16 11:30:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:30:42,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:42,578 INFO L225 Difference]: With dead ends: 11657 [2022-11-16 11:30:42,578 INFO L226 Difference]: Without dead ends: 11651 [2022-11-16 11:30:42,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:30:42,579 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:42,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 0 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-16 11:30:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11651 states. [2022-11-16 11:30:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11651 to 7025. [2022-11-16 11:30:42,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7025 states, 6994 states have (on average 4.531312553617386) internal successors, (31692), 7024 states have internal predecessors, (31692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 31692 transitions. [2022-11-16 11:30:42,787 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 31692 transitions. Word has length 12 [2022-11-16 11:30:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:42,787 INFO L495 AbstractCegarLoop]: Abstraction has 7025 states and 31692 transitions. [2022-11-16 11:30:42,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 31692 transitions. [2022-11-16 11:30:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:42,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:42,790 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1] [2022-11-16 11:30:42,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:30:42,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:42,990 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash -862472672, now seen corresponding path program 2 times [2022-11-16 11:30:42,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:42,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783736401] [2022-11-16 11:30:42,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:30:42,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:42,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:42,993 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:42,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 11:30:43,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:30:43,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:43,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:30:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:43,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:43,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:43,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:43,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:43,443 INFO L321 Elim1Store]: treesize reduction 53, result has 43.0 percent of original size [2022-11-16 11:30:43,444 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 4 case distinctions, treesize of input 18 treesize of output 45 [2022-11-16 11:30:43,476 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:30:43,476 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 31 treesize of output 27 [2022-11-16 11:30:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:30:43,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:30:43,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:43,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783736401] [2022-11-16 11:30:43,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783736401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:30:43,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:30:43,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:30:43,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505339168] [2022-11-16 11:30:43,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:30:43,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:30:43,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:30:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:30:43,725 INFO L87 Difference]: Start difference. First operand 7025 states and 31692 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:44,369 INFO L93 Difference]: Finished difference Result 8816 states and 39518 transitions. [2022-11-16 11:30:44,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:30:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:44,424 INFO L225 Difference]: With dead ends: 8816 [2022-11-16 11:30:44,424 INFO L226 Difference]: Without dead ends: 8816 [2022-11-16 11:30:44,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:30:44,425 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:44,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-11-16 11:30:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2022-11-16 11:30:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 7024. [2022-11-16 11:30:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7024 states, 6993 states have (on average 4.531674531674532) internal successors, (31690), 7023 states have internal predecessors, (31690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7024 states to 7024 states and 31690 transitions. [2022-11-16 11:30:44,668 INFO L78 Accepts]: Start accepts. Automaton has 7024 states and 31690 transitions. Word has length 12 [2022-11-16 11:30:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:44,669 INFO L495 AbstractCegarLoop]: Abstraction has 7024 states and 31690 transitions. [2022-11-16 11:30:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 7024 states and 31690 transitions. [2022-11-16 11:30:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:44,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:44,671 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1] [2022-11-16 11:30:44,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-16 11:30:44,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:44,874 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:44,875 INFO L85 PathProgramCache]: Analyzing trace with hash -862470099, now seen corresponding path program 1 times [2022-11-16 11:30:44,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:44,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519028280] [2022-11-16 11:30:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:44,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:44,876 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:44,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-16 11:30:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:30:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:45,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:45,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:45,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:45,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:45,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:30:45,438 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-16 11:30:45,438 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 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-16 11:30:45,486 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:30:45,486 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 31 treesize of output 27 [2022-11-16 11:30:46,454 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 11:30:46,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:48,443 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 11:30:48,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:48,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519028280] [2022-11-16 11:30:48,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519028280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:48,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:48,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 11:30:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942046375] [2022-11-16 11:30:48,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:48,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:30:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:30:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:30:48,445 INFO L87 Difference]: Start difference. First operand 7024 states and 31690 transitions. Second operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:30:52,239 INFO L93 Difference]: Finished difference Result 7052 states and 31741 transitions. [2022-11-16 11:30:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:30:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:30:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:30:52,274 INFO L225 Difference]: With dead ends: 7052 [2022-11-16 11:30:52,275 INFO L226 Difference]: Without dead ends: 7052 [2022-11-16 11:30:52,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:30:52,276 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:30:52,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 205 Unchecked, 1.2s Time] [2022-11-16 11:30:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2022-11-16 11:30:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 7045. [2022-11-16 11:30:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7045 states, 7014 states have (on average 4.52466495580268) internal successors, (31736), 7044 states have internal predecessors, (31736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 31736 transitions. [2022-11-16 11:30:52,502 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 31736 transitions. Word has length 12 [2022-11-16 11:30:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:30:52,502 INFO L495 AbstractCegarLoop]: Abstraction has 7045 states and 31736 transitions. [2022-11-16 11:30:52,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:30:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 31736 transitions. [2022-11-16 11:30:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:30:52,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:30:52,504 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 11:30:52,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:30:52,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:52,705 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:30:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash -864142134, now seen corresponding path program 3 times [2022-11-16 11:30:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:30:52,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713396275] [2022-11-16 11:30:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:30:52,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:30:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:30:52,707 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:30:52,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 11:30:53,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:30:53,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:30:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:30:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:53,300 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:30:53,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:30:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:53,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:57,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:30:57,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713396275] [2022-11-16 11:30:57,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713396275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:57,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:57,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 11:30:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221305263] [2022-11-16 11:30:57,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:57,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:30:57,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:30:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:30:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:30:57,518 INFO L87 Difference]: Start difference. First operand 7045 states and 31736 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:35,162 INFO L93 Difference]: Finished difference Result 134775 states and 615595 transitions. [2022-11-16 11:31:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:31:35,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:31:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:36,843 INFO L225 Difference]: With dead ends: 134775 [2022-11-16 11:31:36,844 INFO L226 Difference]: Without dead ends: 134775 [2022-11-16 11:31:36,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:31:36,845 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4759 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4613 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:36,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4759 Valid, 0 Invalid, 4635 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 4613 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2022-11-16 11:31:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134775 states. [2022-11-16 11:31:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134775 to 7052. [2022-11-16 11:31:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7052 states, 7021 states have (on average 4.521435692921236) internal successors, (31745), 7051 states have internal predecessors, (31745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7052 states to 7052 states and 31745 transitions. [2022-11-16 11:31:39,187 INFO L78 Accepts]: Start accepts. Automaton has 7052 states and 31745 transitions. Word has length 12 [2022-11-16 11:31:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:39,187 INFO L495 AbstractCegarLoop]: Abstraction has 7052 states and 31745 transitions. [2022-11-16 11:31:39,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7052 states and 31745 transitions. [2022-11-16 11:31:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:39,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:39,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:39,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 11:31:39,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:39,403 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:39,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1698309770, now seen corresponding path program 1 times [2022-11-16 11:31:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:39,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490136099] [2022-11-16 11:31:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:39,404 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 11:31:39,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:39,406 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:39,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-16 11:31:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:39,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:31:39,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:39,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:39,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:39,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490136099] [2022-11-16 11:31:39,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490136099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:39,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:39,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921302534] [2022-11-16 11:31:39,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:31:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:39,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:31:39,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:39,716 INFO L87 Difference]: Start difference. First operand 7052 states and 31745 transitions. Second operand has 3 states, 2 states have (on average 6.5) 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 11:31:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:39,996 INFO L93 Difference]: Finished difference Result 6564 states and 29523 transitions. [2022-11-16 11:31:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:31:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) 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 11:31:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:40,029 INFO L225 Difference]: With dead ends: 6564 [2022-11-16 11:31:40,029 INFO L226 Difference]: Without dead ends: 6561 [2022-11-16 11:31:40,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:40,030 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:40,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:31:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2022-11-16 11:31:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 6561. [2022-11-16 11:31:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6561 states, 6538 states have (on average 4.5105536861425515) internal successors, (29490), 6560 states have internal predecessors, (29490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 29490 transitions. [2022-11-16 11:31:40,464 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 29490 transitions. Word has length 13 [2022-11-16 11:31:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:40,464 INFO L495 AbstractCegarLoop]: Abstraction has 6561 states and 29490 transitions. [2022-11-16 11:31:40,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) 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 11:31:40,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 29490 transitions. [2022-11-16 11:31:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:40,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:40,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:40,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:31:40,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:40,672 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1882808665, now seen corresponding path program 1 times [2022-11-16 11:31:40,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:40,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445775099] [2022-11-16 11:31:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:40,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:40,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:40,673 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:40,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 11:31:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:40,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:41,187 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:41,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:41,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:41,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:41,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445775099] [2022-11-16 11:31:41,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445775099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:41,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:41,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058764566] [2022-11-16 11:31:41,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:41,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:41,400 INFO L87 Difference]: Start difference. First operand 6561 states and 29490 transitions. Second operand has 4 states, 4 states have (on average 3.25) 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 11:31:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:41,716 INFO L93 Difference]: Finished difference Result 6564 states and 29494 transitions. [2022-11-16 11:31:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) 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 14 [2022-11-16 11:31:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:41,740 INFO L225 Difference]: With dead ends: 6564 [2022-11-16 11:31:41,740 INFO L226 Difference]: Without dead ends: 6564 [2022-11-16 11:31:41,740 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 11:31:41,741 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:41,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 11:31:41,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2022-11-16 11:31:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6564. [2022-11-16 11:31:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6564 states, 6541 states have (on average 4.509096468429903) internal successors, (29494), 6563 states have internal predecessors, (29494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6564 states to 6564 states and 29494 transitions. [2022-11-16 11:31:42,084 INFO L78 Accepts]: Start accepts. Automaton has 6564 states and 29494 transitions. Word has length 14 [2022-11-16 11:31:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:42,084 INFO L495 AbstractCegarLoop]: Abstraction has 6564 states and 29494 transitions. [2022-11-16 11:31:42,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) 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 11:31:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 6564 states and 29494 transitions. [2022-11-16 11:31:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:42,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:42,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:42,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:31:42,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:42,296 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1234114775, now seen corresponding path program 1 times [2022-11-16 11:31:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:42,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903282572] [2022-11-16 11:31:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:42,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:42,298 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:42,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 11:31:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:42,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:42,850 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:42,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:43,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:43,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:43,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903282572] [2022-11-16 11:31:43,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903282572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:43,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:43,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626337390] [2022-11-16 11:31:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:43,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:43,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:43,070 INFO L87 Difference]: Start difference. First operand 6564 states and 29494 transitions. Second operand has 4 states, 4 states have (on average 3.25) 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 11:31:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:43,357 INFO L93 Difference]: Finished difference Result 6557 states and 29472 transitions. [2022-11-16 11:31:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) 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 14 [2022-11-16 11:31:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:43,380 INFO L225 Difference]: With dead ends: 6557 [2022-11-16 11:31:43,380 INFO L226 Difference]: Without dead ends: 6557 [2022-11-16 11:31:43,380 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 11:31:43,381 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:43,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:31:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6557 states. [2022-11-16 11:31:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6557 to 6557. [2022-11-16 11:31:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6534 states have (on average 4.510560146923783) internal successors, (29472), 6556 states have internal predecessors, (29472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 29472 transitions. [2022-11-16 11:31:43,621 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 29472 transitions. Word has length 14 [2022-11-16 11:31:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:43,622 INFO L495 AbstractCegarLoop]: Abstraction has 6557 states and 29472 transitions. [2022-11-16 11:31:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) 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 11:31:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 29472 transitions. [2022-11-16 11:31:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:43,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:43,624 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:43,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-16 11:31:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:43,824 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1107621383, now seen corresponding path program 1 times [2022-11-16 11:31:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:43,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389165685] [2022-11-16 11:31:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:43,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:43,827 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:43,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 11:31:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:44,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:44,364 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:44,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:44,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:44,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:44,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389165685] [2022-11-16 11:31:44,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389165685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:44,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:44,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559267334] [2022-11-16 11:31:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:44,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:44,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:44,633 INFO L87 Difference]: Start difference. First operand 6557 states and 29472 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:31:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:44,945 INFO L93 Difference]: Finished difference Result 6556 states and 29466 transitions. [2022-11-16 11:31:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:44,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:44,972 INFO L225 Difference]: With dead ends: 6556 [2022-11-16 11:31:44,972 INFO L226 Difference]: Without dead ends: 6556 [2022-11-16 11:31:44,973 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 11:31:44,973 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:44,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:31:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-16 11:31:45,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6556. [2022-11-16 11:31:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6533 states have (on average 4.510332159804071) internal successors, (29466), 6555 states have internal predecessors, (29466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 29466 transitions. [2022-11-16 11:31:45,300 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 29466 transitions. Word has length 14 [2022-11-16 11:31:45,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:45,301 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 29466 transitions. [2022-11-16 11:31:45,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 29466 transitions. [2022-11-16 11:31:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:45,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:45,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:45,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-16 11:31:45,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:45,505 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:45,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1106847623, now seen corresponding path program 1 times [2022-11-16 11:31:45,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:45,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107436545] [2022-11-16 11:31:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:45,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:45,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:45,508 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:45,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 11:31:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:45,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:46,056 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:46,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:46,362 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 11:31:46,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:46,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107436545] [2022-11-16 11:31:46,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107436545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:46,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:46,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890049809] [2022-11-16 11:31:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:46,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:46,365 INFO L87 Difference]: Start difference. First operand 6556 states and 29466 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:31:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:46,662 INFO L93 Difference]: Finished difference Result 6545 states and 29412 transitions. [2022-11-16 11:31:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:46,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:46,696 INFO L225 Difference]: With dead ends: 6545 [2022-11-16 11:31:46,696 INFO L226 Difference]: Without dead ends: 6545 [2022-11-16 11:31:46,697 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 11:31:46,697 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:46,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:31:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2022-11-16 11:31:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 6545. [2022-11-16 11:31:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6545 states, 6522 states have (on average 4.509659613615455) internal successors, (29412), 6544 states have internal predecessors, (29412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6545 states to 6545 states and 29412 transitions. [2022-11-16 11:31:46,925 INFO L78 Accepts]: Start accepts. Automaton has 6545 states and 29412 transitions. Word has length 14 [2022-11-16 11:31:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:46,925 INFO L495 AbstractCegarLoop]: Abstraction has 6545 states and 29412 transitions. [2022-11-16 11:31:46,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 6545 states and 29412 transitions. [2022-11-16 11:31:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:46,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:46,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:46,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-16 11:31:47,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:47,129 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:47,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1318042186, now seen corresponding path program 1 times [2022-11-16 11:31:47,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:47,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561731470] [2022-11-16 11:31:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:47,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:47,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:47,131 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:47,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 11:31:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:47,750 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:47,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:48,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:48,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:48,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561731470] [2022-11-16 11:31:48,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561731470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:48,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:48,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38228986] [2022-11-16 11:31:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:48,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:48,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:48,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:48,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:48,009 INFO L87 Difference]: Start difference. First operand 6545 states and 29412 transitions. Second operand has 4 states, 4 states have (on average 3.25) 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 11:31:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:48,375 INFO L93 Difference]: Finished difference Result 6538 states and 29390 transitions. [2022-11-16 11:31:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) 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 14 [2022-11-16 11:31:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:48,410 INFO L225 Difference]: With dead ends: 6538 [2022-11-16 11:31:48,410 INFO L226 Difference]: Without dead ends: 6538 [2022-11-16 11:31:48,410 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 11:31:48,411 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:48,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-11-16 11:31:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2022-11-16 11:31:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6538. [2022-11-16 11:31:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6538 states, 6515 states have (on average 4.511128165771297) internal successors, (29390), 6537 states have internal predecessors, (29390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6538 states to 6538 states and 29390 transitions. [2022-11-16 11:31:48,703 INFO L78 Accepts]: Start accepts. Automaton has 6538 states and 29390 transitions. Word has length 14 [2022-11-16 11:31:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:48,703 INFO L495 AbstractCegarLoop]: Abstraction has 6538 states and 29390 transitions. [2022-11-16 11:31:48,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) 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 11:31:48,704 INFO L276 IsEmpty]: Start isEmpty. Operand 6538 states and 29390 transitions. [2022-11-16 11:31:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:48,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:48,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:48,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-16 11:31:48,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:48,907 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1444535578, now seen corresponding path program 1 times [2022-11-16 11:31:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:48,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704816679] [2022-11-16 11:31:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:48,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:48,910 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:48,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 11:31:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:49,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:49,511 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:49,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:49,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:49,801 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704816679] [2022-11-16 11:31:49,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704816679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:49,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:49,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:49,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242719751] [2022-11-16 11:31:49,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:49,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:49,804 INFO L87 Difference]: Start difference. First operand 6538 states and 29390 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:31:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:50,120 INFO L93 Difference]: Finished difference Result 6537 states and 29384 transitions. [2022-11-16 11:31:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:50,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:50,147 INFO L225 Difference]: With dead ends: 6537 [2022-11-16 11:31:50,147 INFO L226 Difference]: Without dead ends: 6537 [2022-11-16 11:31:50,147 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 11:31:50,147 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:50,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:31:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6537 states. [2022-11-16 11:31:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6537 to 6537. [2022-11-16 11:31:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6537 states, 6514 states have (on average 4.510899600859687) internal successors, (29384), 6536 states have internal predecessors, (29384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 29384 transitions. [2022-11-16 11:31:50,307 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 29384 transitions. Word has length 14 [2022-11-16 11:31:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:50,308 INFO L495 AbstractCegarLoop]: Abstraction has 6537 states and 29384 transitions. [2022-11-16 11:31:50,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 29384 transitions. [2022-11-16 11:31:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:50,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:50,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:50,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-16 11:31:50,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:50,514 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1445309338, now seen corresponding path program 1 times [2022-11-16 11:31:50,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:50,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243173675] [2022-11-16 11:31:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:50,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:50,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:50,517 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:50,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 11:31:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:50,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:51,120 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:51,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:51,407 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 11:31:51,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:51,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:51,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243173675] [2022-11-16 11:31:51,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243173675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:51,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:51,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:51,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984975482] [2022-11-16 11:31:51,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:51,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:51,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:51,409 INFO L87 Difference]: Start difference. First operand 6537 states and 29384 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:31:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:51,739 INFO L93 Difference]: Finished difference Result 6526 states and 29330 transitions. [2022-11-16 11:31:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:51,766 INFO L225 Difference]: With dead ends: 6526 [2022-11-16 11:31:51,767 INFO L226 Difference]: Without dead ends: 6526 [2022-11-16 11:31:51,767 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 11:31:51,767 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:51,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 11:31:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2022-11-16 11:31:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 6526. [2022-11-16 11:31:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6503 states have (on average 4.510226049515608) internal successors, (29330), 6525 states have internal predecessors, (29330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 29330 transitions. [2022-11-16 11:31:52,018 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 29330 transitions. Word has length 14 [2022-11-16 11:31:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:52,018 INFO L495 AbstractCegarLoop]: Abstraction has 6526 states and 29330 transitions. [2022-11-16 11:31:52,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 29330 transitions. [2022-11-16 11:31:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:52,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:52,021 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:52,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-16 11:31:52,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:52,221 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -311538610, now seen corresponding path program 1 times [2022-11-16 11:31:52,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:52,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16035354] [2022-11-16 11:31:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:52,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:52,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:52,224 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:52,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 11:31:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:52,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:52,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:52,833 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:52,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:53,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:53,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16035354] [2022-11-16 11:31:53,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16035354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:53,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:53,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:53,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230503683] [2022-11-16 11:31:53,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:53,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:53,099 INFO L87 Difference]: Start difference. First operand 6526 states and 29330 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:31:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:53,416 INFO L93 Difference]: Finished difference Result 6525 states and 29324 transitions. [2022-11-16 11:31:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:53,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:53,443 INFO L225 Difference]: With dead ends: 6525 [2022-11-16 11:31:53,443 INFO L226 Difference]: Without dead ends: 6525 [2022-11-16 11:31:53,443 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 11:31:53,444 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:53,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-16 11:31:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6525 states. [2022-11-16 11:31:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6525 to 6525. [2022-11-16 11:31:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6502 states have (on average 4.509996924023377) internal successors, (29324), 6524 states have internal predecessors, (29324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 29324 transitions. [2022-11-16 11:31:53,605 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 29324 transitions. Word has length 14 [2022-11-16 11:31:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:53,606 INFO L495 AbstractCegarLoop]: Abstraction has 6525 states and 29324 transitions. [2022-11-16 11:31:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 29324 transitions. [2022-11-16 11:31:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:53,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:53,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:53,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-16 11:31:53,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:53,809 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:53,809 INFO L85 PathProgramCache]: Analyzing trace with hash -312312370, now seen corresponding path program 1 times [2022-11-16 11:31:53,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221569410] [2022-11-16 11:31:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:53,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:53,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:53,811 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:53,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 11:31:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:54,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:31:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:54,419 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:54,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:54,674 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 11:31:54,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:31:54,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221569410] [2022-11-16 11:31:54,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221569410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:54,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:54,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:31:54,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494055886] [2022-11-16 11:31:54,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:54,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:31:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:31:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:31:54,676 INFO L87 Difference]: Start difference. First operand 6525 states and 29324 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:31:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:55,064 INFO L93 Difference]: Finished difference Result 6514 states and 29270 transitions. [2022-11-16 11:31:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:55,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:55,090 INFO L225 Difference]: With dead ends: 6514 [2022-11-16 11:31:55,090 INFO L226 Difference]: Without dead ends: 6514 [2022-11-16 11:31:55,090 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 11:31:55,091 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:55,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-16 11:31:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6514 states. [2022-11-16 11:31:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6514 to 6514. [2022-11-16 11:31:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6514 states, 6491 states have (on average 4.509320597750731) internal successors, (29270), 6513 states have internal predecessors, (29270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6514 states to 6514 states and 29270 transitions. [2022-11-16 11:31:55,274 INFO L78 Accepts]: Start accepts. Automaton has 6514 states and 29270 transitions. Word has length 14 [2022-11-16 11:31:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:55,275 INFO L495 AbstractCegarLoop]: Abstraction has 6514 states and 29270 transitions. [2022-11-16 11:31:55,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:31:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 6514 states and 29270 transitions. [2022-11-16 11:31:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:31:55,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:55,278 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1] [2022-11-16 11:31:55,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-16 11:31:55,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:31:55,479 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:31:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash -896630056, now seen corresponding path program 2 times [2022-11-16 11:31:55,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:31:55,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585121562] [2022-11-16 11:31:55,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:31:55,480 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 11:31:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:31:55,481 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:31:55,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 11:31:55,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:31:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:31:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:31:55,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:31:56,119 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:31:56,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:31:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:31:56,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:31:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:58,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:31:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585121562] [2022-11-16 11:31:58,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585121562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:31:58,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:31:58,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:31:58,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535146417] [2022-11-16 11:31:58,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:31:58,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:31:58,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:31:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:31:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:31:58,232 INFO L87 Difference]: Start difference. First operand 6514 states and 29270 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:02,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:04,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:06,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:07,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:13,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:16,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:22,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:32:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:33,712 INFO L93 Difference]: Finished difference Result 23860 states and 103200 transitions. [2022-11-16 11:32:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:32:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:32:33,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:33,819 INFO L225 Difference]: With dead ends: 23860 [2022-11-16 11:32:33,819 INFO L226 Difference]: Without dead ends: 23860 [2022-11-16 11:32:33,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:32:33,820 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1448 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:33,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1448 Valid, 0 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1389 Invalid, 0 Unknown, 264 Unchecked, 29.3s Time] [2022-11-16 11:32:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23860 states. [2022-11-16 11:32:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23860 to 8490. [2022-11-16 11:32:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8467 states have (on average 4.656194638006378) internal successors, (39424), 8489 states have internal predecessors, (39424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 39424 transitions. [2022-11-16 11:32:34,205 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 39424 transitions. Word has length 14 [2022-11-16 11:32:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:34,205 INFO L495 AbstractCegarLoop]: Abstraction has 8490 states and 39424 transitions. [2022-11-16 11:32:34,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 39424 transitions. [2022-11-16 11:32:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:32:34,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:34,209 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:34,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:34,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:34,409 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash 92478342, now seen corresponding path program 2 times [2022-11-16 11:32:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935770337] [2022-11-16 11:32:34,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:32:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:34,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:34,411 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:34,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 11:32:34,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:32:34,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:32:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:32:34,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:34,996 INFO L321 Elim1Store]: treesize reduction 117, result has 30.8 percent of original size [2022-11-16 11:32:34,997 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 4 case distinctions, treesize of input 18 treesize of output 57 [2022-11-16 11:32:35,026 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 152 treesize of output 144 [2022-11-16 11:32:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:32:35,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:35,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:35,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935770337] [2022-11-16 11:32:35,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935770337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:35,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:35,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:35,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415659341] [2022-11-16 11:32:35,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:35,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:32:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:32:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:32:35,336 INFO L87 Difference]: Start difference. First operand 8490 states and 39424 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:36,117 INFO L93 Difference]: Finished difference Result 11672 states and 54228 transitions. [2022-11-16 11:32:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:32:36,118 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 14 [2022-11-16 11:32:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:36,167 INFO L225 Difference]: With dead ends: 11672 [2022-11-16 11:32:36,167 INFO L226 Difference]: Without dead ends: 11672 [2022-11-16 11:32:36,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:32:36,168 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:36,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-11-16 11:32:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11672 states. [2022-11-16 11:32:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11672 to 8490. [2022-11-16 11:32:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8467 states have (on average 4.655958426833589) internal successors, (39422), 8489 states have internal predecessors, (39422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 39422 transitions. [2022-11-16 11:32:36,415 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 39422 transitions. Word has length 14 [2022-11-16 11:32:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:36,415 INFO L495 AbstractCegarLoop]: Abstraction has 8490 states and 39422 transitions. [2022-11-16 11:32:36,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 39422 transitions. [2022-11-16 11:32:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:32:36,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:36,419 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:36,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 11:32:36,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:36,619 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash 93809079, now seen corresponding path program 1 times [2022-11-16 11:32:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:36,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594802438] [2022-11-16 11:32:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:36,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:36,621 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:36,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 11:32:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:32:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:37,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:32:37,268 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-16 11:32:37,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-16 11:32:37,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:32:38,418 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 11:32:38,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:32:40,462 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 11:32:40,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:40,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594802438] [2022-11-16 11:32:40,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594802438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:32:40,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:32:40,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 11:32:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359466692] [2022-11-16 11:32:40,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:32:40,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:32:40,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:32:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:32:40,464 INFO L87 Difference]: Start difference. First operand 8490 states and 39422 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:45,433 INFO L93 Difference]: Finished difference Result 12422 states and 57124 transitions. [2022-11-16 11:32:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:32:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:32:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:45,489 INFO L225 Difference]: With dead ends: 12422 [2022-11-16 11:32:45,489 INFO L226 Difference]: Without dead ends: 12422 [2022-11-16 11:32:45,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:32:45,490 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:45,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 444 Invalid, 0 Unknown, 410 Unchecked, 2.1s Time] [2022-11-16 11:32:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12422 states. [2022-11-16 11:32:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12422 to 8474. [2022-11-16 11:32:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8474 states, 8451 states have (on average 4.661105194651521) internal successors, (39391), 8473 states have internal predecessors, (39391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8474 states to 8474 states and 39391 transitions. [2022-11-16 11:32:45,753 INFO L78 Accepts]: Start accepts. Automaton has 8474 states and 39391 transitions. Word has length 14 [2022-11-16 11:32:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:45,754 INFO L495 AbstractCegarLoop]: Abstraction has 8474 states and 39391 transitions. [2022-11-16 11:32:45,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 8474 states and 39391 transitions. [2022-11-16 11:32:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:45,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:45,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:45,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:45,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:45,958 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1014253156, now seen corresponding path program 1 times [2022-11-16 11:32:45,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:45,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809957305] [2022-11-16 11:32:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:45,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:45,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:45,960 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:45,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 11:32:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:46,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:46,547 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:46,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:46,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:46,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809957305] [2022-11-16 11:32:46,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809957305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:46,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:46,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835636267] [2022-11-16 11:32:46,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:46,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:46,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:46,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:46,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:46,797 INFO L87 Difference]: Start difference. First operand 8474 states and 39391 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:32:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:47,227 INFO L93 Difference]: Finished difference Result 8475 states and 39393 transitions. [2022-11-16 11:32:47,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 15 [2022-11-16 11:32:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:47,260 INFO L225 Difference]: With dead ends: 8475 [2022-11-16 11:32:47,260 INFO L226 Difference]: Without dead ends: 8475 [2022-11-16 11:32:47,260 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 11:32:47,261 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:47,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:32:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8475 states. [2022-11-16 11:32:47,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8475 to 8475. [2022-11-16 11:32:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8452 states have (on average 4.660790345480359) internal successors, (39393), 8474 states have internal predecessors, (39393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 39393 transitions. [2022-11-16 11:32:47,459 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 39393 transitions. Word has length 15 [2022-11-16 11:32:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:47,459 INFO L495 AbstractCegarLoop]: Abstraction has 8475 states and 39393 transitions. [2022-11-16 11:32:47,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:32:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 39393 transitions. [2022-11-16 11:32:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:47,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:47,463 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:47,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-16 11:32:47,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:47,664 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1140746548, now seen corresponding path program 1 times [2022-11-16 11:32:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:47,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387572873] [2022-11-16 11:32:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:47,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:47,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:47,666 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:47,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 11:32:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:47,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:47,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:48,255 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:48,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:48,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:48,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387572873] [2022-11-16 11:32:48,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387572873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:48,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92633176] [2022-11-16 11:32:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:48,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:48,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:48,522 INFO L87 Difference]: Start difference. First operand 8475 states and 39393 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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 11:32:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:48,852 INFO L93 Difference]: Finished difference Result 8476 states and 39397 transitions. [2022-11-16 11:32:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:48,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:48,887 INFO L225 Difference]: With dead ends: 8476 [2022-11-16 11:32:48,887 INFO L226 Difference]: Without dead ends: 8476 [2022-11-16 11:32:48,887 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 11:32:48,887 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:48,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:32:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2022-11-16 11:32:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 8476. [2022-11-16 11:32:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8476 states, 8453 states have (on average 4.660712173192949) internal successors, (39397), 8475 states have internal predecessors, (39397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8476 states to 8476 states and 39397 transitions. [2022-11-16 11:32:49,242 INFO L78 Accepts]: Start accepts. Automaton has 8476 states and 39397 transitions. Word has length 15 [2022-11-16 11:32:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:49,242 INFO L495 AbstractCegarLoop]: Abstraction has 8476 states and 39397 transitions. [2022-11-16 11:32:49,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 8476 states and 39397 transitions. [2022-11-16 11:32:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:49,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:49,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:49,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-16 11:32:49,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:49,448 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1141520308, now seen corresponding path program 1 times [2022-11-16 11:32:49,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:49,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472997091] [2022-11-16 11:32:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:49,450 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:49,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 11:32:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:50,016 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:50,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:32:50,286 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 11:32:50,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:50,286 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:50,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472997091] [2022-11-16 11:32:50,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472997091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:50,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:50,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:50,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065476248] [2022-11-16 11:32:50,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:50,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:50,289 INFO L87 Difference]: Start difference. First operand 8476 states and 39397 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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 11:32:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:50,624 INFO L93 Difference]: Finished difference Result 8476 states and 39396 transitions. [2022-11-16 11:32:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:50,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:50,658 INFO L225 Difference]: With dead ends: 8476 [2022-11-16 11:32:50,658 INFO L226 Difference]: Without dead ends: 8476 [2022-11-16 11:32:50,659 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 11:32:50,659 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:50,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 11:32:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2022-11-16 11:32:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 8476. [2022-11-16 11:32:50,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8476 states, 8453 states have (on average 4.660593871998107) internal successors, (39396), 8475 states have internal predecessors, (39396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8476 states to 8476 states and 39396 transitions. [2022-11-16 11:32:50,870 INFO L78 Accepts]: Start accepts. Automaton has 8476 states and 39396 transitions. Word has length 15 [2022-11-16 11:32:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:50,870 INFO L495 AbstractCegarLoop]: Abstraction has 8476 states and 39396 transitions. [2022-11-16 11:32:50,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 8476 states and 39396 transitions. [2022-11-16 11:32:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:50,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:50,873 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:50,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-16 11:32:51,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:51,074 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:51,074 INFO L85 PathProgramCache]: Analyzing trace with hash -7749580, now seen corresponding path program 1 times [2022-11-16 11:32:51,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:51,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135902949] [2022-11-16 11:32:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:51,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:51,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:51,076 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:51,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 11:32:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:51,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:51,633 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:51,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:51,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:51,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:51,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135902949] [2022-11-16 11:32:51,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135902949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:51,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:51,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:51,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190458123] [2022-11-16 11:32:51,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:51,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:51,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:51,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:51,887 INFO L87 Difference]: Start difference. First operand 8476 states and 39396 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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 11:32:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:52,215 INFO L93 Difference]: Finished difference Result 8475 states and 39390 transitions. [2022-11-16 11:32:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:52,435 INFO L225 Difference]: With dead ends: 8475 [2022-11-16 11:32:52,436 INFO L226 Difference]: Without dead ends: 8475 [2022-11-16 11:32:52,436 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 11:32:52,436 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:52,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-16 11:32:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8475 states. [2022-11-16 11:32:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8475 to 8475. [2022-11-16 11:32:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8452 states have (on average 4.660435399905348) internal successors, (39390), 8474 states have internal predecessors, (39390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 39390 transitions. [2022-11-16 11:32:52,631 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 39390 transitions. Word has length 15 [2022-11-16 11:32:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:52,632 INFO L495 AbstractCegarLoop]: Abstraction has 8475 states and 39390 transitions. [2022-11-16 11:32:52,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:52,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 39390 transitions. [2022-11-16 11:32:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:52,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:52,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:52,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-16 11:32:52,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:52,836 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash -8523340, now seen corresponding path program 1 times [2022-11-16 11:32:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:52,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448103151] [2022-11-16 11:32:52,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:52,838 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:52,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:52,839 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:52,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 11:32:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:53,421 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:53,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:53,693 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 11:32:53,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:53,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448103151] [2022-11-16 11:32:53,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448103151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:53,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:53,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:53,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259825092] [2022-11-16 11:32:53,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:53,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:53,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:53,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:53,695 INFO L87 Difference]: Start difference. First operand 8475 states and 39390 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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 11:32:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:54,031 INFO L93 Difference]: Finished difference Result 8464 states and 39336 transitions. [2022-11-16 11:32:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:54,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:54,067 INFO L225 Difference]: With dead ends: 8464 [2022-11-16 11:32:54,067 INFO L226 Difference]: Without dead ends: 8464 [2022-11-16 11:32:54,067 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 11:32:54,067 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:54,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 11:32:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2022-11-16 11:32:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 8464. [2022-11-16 11:32:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8464 states, 8441 states have (on average 4.660111361213127) internal successors, (39336), 8463 states have internal predecessors, (39336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8464 states to 8464 states and 39336 transitions. [2022-11-16 11:32:54,276 INFO L78 Accepts]: Start accepts. Automaton has 8464 states and 39336 transitions. Word has length 15 [2022-11-16 11:32:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:54,276 INFO L495 AbstractCegarLoop]: Abstraction has 8464 states and 39336 transitions. [2022-11-16 11:32:54,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 8464 states and 39336 transitions. [2022-11-16 11:32:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:54,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:54,375 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:54,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-16 11:32:54,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:54,576 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:54,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1815204043, now seen corresponding path program 1 times [2022-11-16 11:32:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:54,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641340031] [2022-11-16 11:32:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:54,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:54,578 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:54,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 11:32:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:54,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:54,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:55,186 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:55,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:32:55,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:55,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641340031] [2022-11-16 11:32:55,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641340031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:55,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:55,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:55,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214446441] [2022-11-16 11:32:55,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:55,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:55,457 INFO L87 Difference]: Start difference. First operand 8464 states and 39336 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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 11:32:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:55,843 INFO L93 Difference]: Finished difference Result 8463 states and 39331 transitions. [2022-11-16 11:32:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:55,894 INFO L225 Difference]: With dead ends: 8463 [2022-11-16 11:32:55,894 INFO L226 Difference]: Without dead ends: 8463 [2022-11-16 11:32:55,894 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 11:32:55,895 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:55,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-16 11:32:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2022-11-16 11:32:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8463. [2022-11-16 11:32:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8463 states, 8440 states have (on average 4.660071090047393) internal successors, (39331), 8462 states have internal predecessors, (39331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8463 states to 8463 states and 39331 transitions. [2022-11-16 11:32:56,197 INFO L78 Accepts]: Start accepts. Automaton has 8463 states and 39331 transitions. Word has length 15 [2022-11-16 11:32:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:56,198 INFO L495 AbstractCegarLoop]: Abstraction has 8463 states and 39331 transitions. [2022-11-16 11:32:56,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 8463 states and 39331 transitions. [2022-11-16 11:32:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:56,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:56,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:56,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:32:56,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:56,410 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1815977803, now seen corresponding path program 1 times [2022-11-16 11:32:56,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:56,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564375980] [2022-11-16 11:32:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:56,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:56,413 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:56,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 11:32:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:57,003 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:57,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:57,266 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 11:32:57,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:57,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:57,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564375980] [2022-11-16 11:32:57,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564375980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:57,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:57,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:57,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484860261] [2022-11-16 11:32:57,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:57,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:57,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:57,267 INFO L87 Difference]: Start difference. First operand 8463 states and 39331 transitions. Second operand has 4 states, 4 states have (on average 3.75) 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 11:32:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:57,589 INFO L93 Difference]: Finished difference Result 8452 states and 39288 transitions. [2022-11-16 11:32:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:57,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:57,623 INFO L225 Difference]: With dead ends: 8452 [2022-11-16 11:32:57,623 INFO L226 Difference]: Without dead ends: 8452 [2022-11-16 11:32:57,623 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 11:32:57,623 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:57,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 11:32:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-16 11:32:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8452. [2022-11-16 11:32:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8452 states, 8429 states have (on average 4.661051132993237) internal successors, (39288), 8451 states have internal predecessors, (39288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8452 states to 8452 states and 39288 transitions. [2022-11-16 11:32:57,916 INFO L78 Accepts]: Start accepts. Automaton has 8452 states and 39288 transitions. Word has length 15 [2022-11-16 11:32:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:57,916 INFO L495 AbstractCegarLoop]: Abstraction has 8452 states and 39288 transitions. [2022-11-16 11:32:57,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) 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 11:32:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 8452 states and 39288 transitions. [2022-11-16 11:32:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:57,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:57,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:57,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-16 11:32:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:58,120 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 220546550, now seen corresponding path program 1 times [2022-11-16 11:32:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:58,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909694364] [2022-11-16 11:32:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:58,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:58,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:58,122 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:58,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 11:32:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:32:58,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:32:58,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:32:58,692 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:32:58,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:32:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:32:58,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:32:58,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:32:58,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909694364] [2022-11-16 11:32:58,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909694364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:32:58,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:32:58,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:32:58,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473984235] [2022-11-16 11:32:58,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:32:58,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:32:58,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:32:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:32:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:32:58,924 INFO L87 Difference]: Start difference. First operand 8452 states and 39288 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:32:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:32:59,255 INFO L93 Difference]: Finished difference Result 8447 states and 39265 transitions. [2022-11-16 11:32:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:32:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 15 [2022-11-16 11:32:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:32:59,290 INFO L225 Difference]: With dead ends: 8447 [2022-11-16 11:32:59,290 INFO L226 Difference]: Without dead ends: 8447 [2022-11-16 11:32:59,291 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 11:32:59,291 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:32:59,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 11:32:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2022-11-16 11:32:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 8447. [2022-11-16 11:32:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8447 states, 8424 states have (on average 4.661087369420703) internal successors, (39265), 8446 states have internal predecessors, (39265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:32:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 39265 transitions. [2022-11-16 11:32:59,521 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 39265 transitions. Word has length 15 [2022-11-16 11:32:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:32:59,522 INFO L495 AbstractCegarLoop]: Abstraction has 8447 states and 39265 transitions. [2022-11-16 11:32:59,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:32:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 39265 transitions. [2022-11-16 11:32:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:32:59,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:32:59,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:32:59,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-16 11:32:59,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:59,727 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:32:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:32:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 220844770, now seen corresponding path program 1 times [2022-11-16 11:32:59,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:32:59,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176786353] [2022-11-16 11:32:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:32:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:32:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:32:59,729 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:32:59,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 11:33:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:00,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:33:00,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:00,376 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:00,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:33:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:33:00,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:33:00,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176786353] [2022-11-16 11:33:00,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176786353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:33:00,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:33:00,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:33:00,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874477061] [2022-11-16 11:33:00,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:33:00,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:33:00,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:00,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:33:00,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:33:00,641 INFO L87 Difference]: Start difference. First operand 8447 states and 39265 transitions. Second operand has 4 states, 4 states have (on average 3.5) 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 11:33:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:00,976 INFO L93 Difference]: Finished difference Result 8442 states and 39242 transitions. [2022-11-16 11:33:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:33:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) 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 15 [2022-11-16 11:33:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:01,010 INFO L225 Difference]: With dead ends: 8442 [2022-11-16 11:33:01,010 INFO L226 Difference]: Without dead ends: 8442 [2022-11-16 11:33:01,010 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 11:33:01,011 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:01,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 11:33:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-11-16 11:33:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 8442. [2022-11-16 11:33:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8442 states, 8419 states have (on average 4.661123648889417) internal successors, (39242), 8441 states have internal predecessors, (39242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8442 states to 8442 states and 39242 transitions. [2022-11-16 11:33:01,216 INFO L78 Accepts]: Start accepts. Automaton has 8442 states and 39242 transitions. Word has length 15 [2022-11-16 11:33:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:01,216 INFO L495 AbstractCegarLoop]: Abstraction has 8442 states and 39242 transitions. [2022-11-16 11:33:01,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) 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 11:33:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 8442 states and 39242 transitions. [2022-11-16 11:33:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:01,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:01,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:01,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:01,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:01,420 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1958191533, now seen corresponding path program 1 times [2022-11-16 11:33:01,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:01,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209515839] [2022-11-16 11:33:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:01,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:01,422 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:01,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:33:01,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:02,024 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:02,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:33:02,259 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 11:33:02,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:03,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209515839] [2022-11-16 11:33:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209515839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:03,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:03,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2022-11-16 11:33:03,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238884273] [2022-11-16 11:33:03,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:03,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:33:03,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:33:03,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:33:03,262 INFO L87 Difference]: Start difference. First operand 8442 states and 39242 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:05,554 INFO L93 Difference]: Finished difference Result 8585 states and 39573 transitions. [2022-11-16 11:33:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:33:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 15 [2022-11-16 11:33:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:05,587 INFO L225 Difference]: With dead ends: 8585 [2022-11-16 11:33:05,587 INFO L226 Difference]: Without dead ends: 8585 [2022-11-16 11:33:05,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:33:05,587 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:05,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 28 Unchecked, 1.9s Time] [2022-11-16 11:33:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2022-11-16 11:33:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8407. [2022-11-16 11:33:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8407 states, 8384 states have (on average 4.663764312977099) internal successors, (39101), 8406 states have internal predecessors, (39101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8407 states to 8407 states and 39101 transitions. [2022-11-16 11:33:05,886 INFO L78 Accepts]: Start accepts. Automaton has 8407 states and 39101 transitions. Word has length 15 [2022-11-16 11:33:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:05,887 INFO L495 AbstractCegarLoop]: Abstraction has 8407 states and 39101 transitions. [2022-11-16 11:33:05,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8407 states and 39101 transitions. [2022-11-16 11:33:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:05,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:05,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:05,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:06,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:06,091 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:06,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:06,092 INFO L85 PathProgramCache]: Analyzing trace with hash 961145504, now seen corresponding path program 1 times [2022-11-16 11:33:06,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:06,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410696164] [2022-11-16 11:33:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:06,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:06,093 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:06,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:06,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:33:06,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:06,740 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:06,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:33:07,045 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 11:33:07,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:08,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:08,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410696164] [2022-11-16 11:33:08,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410696164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:08,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:08,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2022-11-16 11:33:08,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176166180] [2022-11-16 11:33:08,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:08,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:33:08,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:33:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:33:08,080 INFO L87 Difference]: Start difference. First operand 8407 states and 39101 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:10,770 INFO L93 Difference]: Finished difference Result 8563 states and 39517 transitions. [2022-11-16 11:33:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:33:10,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 15 [2022-11-16 11:33:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:10,806 INFO L225 Difference]: With dead ends: 8563 [2022-11-16 11:33:10,806 INFO L226 Difference]: Without dead ends: 8563 [2022-11-16 11:33:10,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:33:10,807 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:10,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 0 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 381 Invalid, 0 Unknown, 63 Unchecked, 2.3s Time] [2022-11-16 11:33:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8563 states. [2022-11-16 11:33:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8563 to 8385. [2022-11-16 11:33:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8385 states, 8362 states have (on average 4.669337479071992) internal successors, (39045), 8384 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8385 states to 8385 states and 39045 transitions. [2022-11-16 11:33:11,172 INFO L78 Accepts]: Start accepts. Automaton has 8385 states and 39045 transitions. Word has length 15 [2022-11-16 11:33:11,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:11,172 INFO L495 AbstractCegarLoop]: Abstraction has 8385 states and 39045 transitions. [2022-11-16 11:33:11,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8385 states and 39045 transitions. [2022-11-16 11:33:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:11,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:11,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:11,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:11,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:11,377 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:11,378 INFO L85 PathProgramCache]: Analyzing trace with hash 9247769, now seen corresponding path program 1 times [2022-11-16 11:33:11,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:11,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975593860] [2022-11-16 11:33:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:11,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:11,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:11,394 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:11,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:33:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:12,060 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:12,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:33:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:33:12,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:13,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975593860] [2022-11-16 11:33:13,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975593860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:13,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:13,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:33:13,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543533525] [2022-11-16 11:33:13,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:13,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:33:13,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:33:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:33:13,147 INFO L87 Difference]: Start difference. First operand 8385 states and 39045 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:15,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:33:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:20,116 INFO L93 Difference]: Finished difference Result 8684 states and 39831 transitions. [2022-11-16 11:33:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:33:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:33:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:20,150 INFO L225 Difference]: With dead ends: 8684 [2022-11-16 11:33:20,150 INFO L226 Difference]: Without dead ends: 8684 [2022-11-16 11:33:20,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:33:20,151 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:20,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 426 Invalid, 0 Unknown, 32 Unchecked, 6.5s Time] [2022-11-16 11:33:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2022-11-16 11:33:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 8424. [2022-11-16 11:33:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8424 states, 8401 states have (on average 4.66313534103083) internal successors, (39175), 8423 states have internal predecessors, (39175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8424 states to 8424 states and 39175 transitions. [2022-11-16 11:33:20,353 INFO L78 Accepts]: Start accepts. Automaton has 8424 states and 39175 transitions. Word has length 15 [2022-11-16 11:33:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:20,353 INFO L495 AbstractCegarLoop]: Abstraction has 8424 states and 39175 transitions. [2022-11-16 11:33:20,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 8424 states and 39175 transitions. [2022-11-16 11:33:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:20,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:20,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:20,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-16 11:33:20,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:20,559 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:20,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1168796087, now seen corresponding path program 1 times [2022-11-16 11:33:20,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730159909] [2022-11-16 11:33:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:20,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:20,561 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:20,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:33:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:21,153 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:21,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:33:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:33:21,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:22,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:22,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730159909] [2022-11-16 11:33:22,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [730159909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:22,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:22,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:33:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907666144] [2022-11-16 11:33:22,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:22,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:33:22,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:22,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:33:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:33:22,449 INFO L87 Difference]: Start difference. First operand 8424 states and 39175 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:25,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:33:26,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:33:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:29,408 INFO L93 Difference]: Finished difference Result 8685 states and 39766 transitions. [2022-11-16 11:33:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:33:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:33:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:29,449 INFO L225 Difference]: With dead ends: 8685 [2022-11-16 11:33:29,449 INFO L226 Difference]: Without dead ends: 8685 [2022-11-16 11:33:29,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:33:29,450 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 277 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:29,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 0 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 400 Invalid, 0 Unknown, 130 Unchecked, 6.4s Time] [2022-11-16 11:33:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2022-11-16 11:33:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8413. [2022-11-16 11:33:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8413 states, 8390 states have (on average 4.654112038140644) internal successors, (39048), 8412 states have internal predecessors, (39048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8413 states to 8413 states and 39048 transitions. [2022-11-16 11:33:29,677 INFO L78 Accepts]: Start accepts. Automaton has 8413 states and 39048 transitions. Word has length 15 [2022-11-16 11:33:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:29,677 INFO L495 AbstractCegarLoop]: Abstraction has 8413 states and 39048 transitions. [2022-11-16 11:33:29,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:29,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8413 states and 39048 transitions. [2022-11-16 11:33:29,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:29,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:29,681 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:29,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-16 11:33:29,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:29,881 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:29,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1295289479, now seen corresponding path program 1 times [2022-11-16 11:33:29,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:29,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357126425] [2022-11-16 11:33:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:29,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:29,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:29,884 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:29,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:33:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:30,502 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:30,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:33:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:30,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:31,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:31,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357126425] [2022-11-16 11:33:31,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357126425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:31,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:31,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:33:31,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862066291] [2022-11-16 11:33:31,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:31,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:33:31,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:33:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:33:31,729 INFO L87 Difference]: Start difference. First operand 8413 states and 39048 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:35,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:33:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:38,400 INFO L93 Difference]: Finished difference Result 8655 states and 39551 transitions. [2022-11-16 11:33:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:33:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:33:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:38,434 INFO L225 Difference]: With dead ends: 8655 [2022-11-16 11:33:38,434 INFO L226 Difference]: Without dead ends: 8655 [2022-11-16 11:33:38,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:33:38,434 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 207 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:38,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 0 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 404 Invalid, 0 Unknown, 64 Unchecked, 6.2s Time] [2022-11-16 11:33:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2022-11-16 11:33:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 8395. [2022-11-16 11:33:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8395 states, 8372 states have (on average 4.645843287147635) internal successors, (38895), 8394 states have internal predecessors, (38895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8395 states to 8395 states and 38895 transitions. [2022-11-16 11:33:38,683 INFO L78 Accepts]: Start accepts. Automaton has 8395 states and 38895 transitions. Word has length 15 [2022-11-16 11:33:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:38,683 INFO L495 AbstractCegarLoop]: Abstraction has 8395 states and 38895 transitions. [2022-11-16 11:33:38,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8395 states and 38895 transitions. [2022-11-16 11:33:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:38,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:38,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:38,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-16 11:33:38,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:38,886 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:38,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1296063239, now seen corresponding path program 1 times [2022-11-16 11:33:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:38,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092833274] [2022-11-16 11:33:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:38,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:38,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:38,888 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:38,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:33:39,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:39,419 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:39,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:33:39,662 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 11:33:39,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:40,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092833274] [2022-11-16 11:33:40,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092833274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:40,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:40,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:33:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679126260] [2022-11-16 11:33:40,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:33:40,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:40,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:33:40,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:33:40,405 INFO L87 Difference]: Start difference. First operand 8395 states and 38895 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:42,017 INFO L93 Difference]: Finished difference Result 8604 states and 39487 transitions. [2022-11-16 11:33:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:33:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:33:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:42,052 INFO L225 Difference]: With dead ends: 8604 [2022-11-16 11:33:42,052 INFO L226 Difference]: Without dead ends: 8604 [2022-11-16 11:33:42,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:33:42,052 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:42,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 74 Unchecked, 1.3s Time] [2022-11-16 11:33:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8604 states. [2022-11-16 11:33:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8604 to 8395. [2022-11-16 11:33:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8395 states, 8372 states have (on average 4.645723841376015) internal successors, (38894), 8394 states have internal predecessors, (38894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8395 states to 8395 states and 38894 transitions. [2022-11-16 11:33:42,339 INFO L78 Accepts]: Start accepts. Automaton has 8395 states and 38894 transitions. Word has length 15 [2022-11-16 11:33:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:42,339 INFO L495 AbstractCegarLoop]: Abstraction has 8395 states and 38894 transitions. [2022-11-16 11:33:42,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 8395 states and 38894 transitions. [2022-11-16 11:33:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:42,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:42,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:42,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:42,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:42,544 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash 216192932, now seen corresponding path program 1 times [2022-11-16 11:33:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:42,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959720113] [2022-11-16 11:33:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:42,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:42,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:42,546 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:42,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:33:42,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:43,085 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:43,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:33:43,299 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 11:33:43,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:44,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959720113] [2022-11-16 11:33:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959720113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:44,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:44,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2022-11-16 11:33:44,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258833136] [2022-11-16 11:33:44,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:44,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:33:44,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:33:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:33:44,188 INFO L87 Difference]: Start difference. First operand 8395 states and 38894 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:46,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:46,329 INFO L93 Difference]: Finished difference Result 8597 states and 39450 transitions. [2022-11-16 11:33:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:33:46,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 15 [2022-11-16 11:33:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:46,362 INFO L225 Difference]: With dead ends: 8597 [2022-11-16 11:33:46,362 INFO L226 Difference]: Without dead ends: 8597 [2022-11-16 11:33:46,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:33:46,362 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:46,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 28 Unchecked, 1.8s Time] [2022-11-16 11:33:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8597 states. [2022-11-16 11:33:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8597 to 8371. [2022-11-16 11:33:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8371 states, 8348 states have (on average 4.652132247244849) internal successors, (38836), 8370 states have internal predecessors, (38836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8371 states to 8371 states and 38836 transitions. [2022-11-16 11:33:46,564 INFO L78 Accepts]: Start accepts. Automaton has 8371 states and 38836 transitions. Word has length 15 [2022-11-16 11:33:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:46,564 INFO L495 AbstractCegarLoop]: Abstraction has 8371 states and 38836 transitions. [2022-11-16 11:33:46,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 8371 states and 38836 transitions. [2022-11-16 11:33:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:46,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:46,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:46,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-16 11:33:46,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:46,825 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:46,826 INFO L85 PathProgramCache]: Analyzing trace with hash 574014248, now seen corresponding path program 1 times [2022-11-16 11:33:46,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:46,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182674642] [2022-11-16 11:33:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:46,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:46,827 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:46,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:33:47,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:47,366 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:47,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:33:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:33:47,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:48,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182674642] [2022-11-16 11:33:48,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182674642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:48,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:48,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:33:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772318078] [2022-11-16 11:33:48,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:48,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:33:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:33:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:33:48,447 INFO L87 Difference]: Start difference. First operand 8371 states and 38836 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:52,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:33:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:33:55,298 INFO L93 Difference]: Finished difference Result 8632 states and 39496 transitions. [2022-11-16 11:33:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:33:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:33:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:33:55,332 INFO L225 Difference]: With dead ends: 8632 [2022-11-16 11:33:55,332 INFO L226 Difference]: Without dead ends: 8632 [2022-11-16 11:33:55,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:33:55,332 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 271 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:33:55,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 0 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 402 Invalid, 0 Unknown, 33 Unchecked, 6.4s Time] [2022-11-16 11:33:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-11-16 11:33:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 8372. [2022-11-16 11:33:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8372 states, 8349 states have (on average 4.652054138220146) internal successors, (38840), 8371 states have internal predecessors, (38840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8372 states to 8372 states and 38840 transitions. [2022-11-16 11:33:55,572 INFO L78 Accepts]: Start accepts. Automaton has 8372 states and 38840 transitions. Word has length 15 [2022-11-16 11:33:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:33:55,572 INFO L495 AbstractCegarLoop]: Abstraction has 8372 states and 38840 transitions. [2022-11-16 11:33:55,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:33:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8372 states and 38840 transitions. [2022-11-16 11:33:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:33:55,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:33:55,576 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:33:55,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:55,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:55,776 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:33:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:33:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 447520856, now seen corresponding path program 1 times [2022-11-16 11:33:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:33:55,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752178778] [2022-11-16 11:33:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:33:55,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:33:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:33:55,778 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:33:55,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:33:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:33:56,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:33:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:33:56,292 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:33:56,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:33:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:56,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:33:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:33:57,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:33:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752178778] [2022-11-16 11:33:57,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752178778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:33:57,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:33:57,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:33:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558732077] [2022-11-16 11:33:57,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:33:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:33:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:33:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:33:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:33:57,279 INFO L87 Difference]: Start difference. First operand 8372 states and 38840 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:00,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:34:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:03,017 INFO L93 Difference]: Finished difference Result 8633 states and 39502 transitions. [2022-11-16 11:34:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:34:03,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:34:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:03,048 INFO L225 Difference]: With dead ends: 8633 [2022-11-16 11:34:03,049 INFO L226 Difference]: Without dead ends: 8633 [2022-11-16 11:34:03,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:34:03,049 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:03,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 395 Invalid, 0 Unknown, 102 Unchecked, 5.3s Time] [2022-11-16 11:34:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8633 states. [2022-11-16 11:34:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8633 to 8373. [2022-11-16 11:34:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8373 states, 8350 states have (on average 4.6522155688622755) internal successors, (38846), 8372 states have internal predecessors, (38846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:03,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8373 states to 8373 states and 38846 transitions. [2022-11-16 11:34:03,235 INFO L78 Accepts]: Start accepts. Automaton has 8373 states and 38846 transitions. Word has length 15 [2022-11-16 11:34:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:03,236 INFO L495 AbstractCegarLoop]: Abstraction has 8373 states and 38846 transitions. [2022-11-16 11:34:03,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8373 states and 38846 transitions. [2022-11-16 11:34:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:34:03,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:03,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:03,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:03,439 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:34:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash 446747096, now seen corresponding path program 1 times [2022-11-16 11:34:03,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767847591] [2022-11-16 11:34:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:03,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:03,441 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:34:03,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:34:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:03,969 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:34:03,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:34:04,203 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 11:34:04,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:04,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:04,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767847591] [2022-11-16 11:34:04,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767847591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:04,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:04,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:34:04,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645581512] [2022-11-16 11:34:04,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:04,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:34:04,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:34:04,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:34:04,922 INFO L87 Difference]: Start difference. First operand 8373 states and 38846 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:06,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:34:08,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:34:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:11,600 INFO L93 Difference]: Finished difference Result 8633 states and 39501 transitions. [2022-11-16 11:34:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:34:11,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:34:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:11,635 INFO L225 Difference]: With dead ends: 8633 [2022-11-16 11:34:11,635 INFO L226 Difference]: Without dead ends: 8633 [2022-11-16 11:34:11,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:34:11,635 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 271 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:11,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 0 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 402 Invalid, 0 Unknown, 35 Unchecked, 6.2s Time] [2022-11-16 11:34:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8633 states. [2022-11-16 11:34:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8633 to 8373. [2022-11-16 11:34:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8373 states, 8350 states have (on average 4.652095808383233) internal successors, (38845), 8372 states have internal predecessors, (38845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8373 states to 8373 states and 38845 transitions. [2022-11-16 11:34:11,839 INFO L78 Accepts]: Start accepts. Automaton has 8373 states and 38845 transitions. Word has length 15 [2022-11-16 11:34:11,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:11,839 INFO L495 AbstractCegarLoop]: Abstraction has 8373 states and 38845 transitions. [2022-11-16 11:34:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 8373 states and 38845 transitions. [2022-11-16 11:34:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:34:11,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:11,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:11,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:12,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:12,043 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:34:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1487284624, now seen corresponding path program 2 times [2022-11-16 11:34:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796412280] [2022-11-16 11:34:12,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:34:12,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:12,045 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:34:12,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:12,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:34:12,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:34:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:34:12,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:12,717 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:34:12,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:13,093 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 11:34:13,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:14,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:14,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796412280] [2022-11-16 11:34:14,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796412280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:14,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:14,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2022-11-16 11:34:14,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316977479] [2022-11-16 11:34:14,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:14,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:34:14,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:34:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:34:14,242 INFO L87 Difference]: Start difference. First operand 8373 states and 38845 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:16,727 INFO L93 Difference]: Finished difference Result 8576 states and 39344 transitions. [2022-11-16 11:34:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:34:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 15 [2022-11-16 11:34:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:16,763 INFO L225 Difference]: With dead ends: 8576 [2022-11-16 11:34:16,763 INFO L226 Difference]: Without dead ends: 8576 [2022-11-16 11:34:16,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:34:16,763 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:16,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 309 Invalid, 0 Unknown, 30 Unchecked, 2.1s Time] [2022-11-16 11:34:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2022-11-16 11:34:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 8350. [2022-11-16 11:34:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8350 states, 8327 states have (on average 4.651134862495496) internal successors, (38730), 8349 states have internal predecessors, (38730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 38730 transitions. [2022-11-16 11:34:16,974 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 38730 transitions. Word has length 15 [2022-11-16 11:34:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:16,975 INFO L495 AbstractCegarLoop]: Abstraction has 8350 states and 38730 transitions. [2022-11-16 11:34:16,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 38730 transitions. [2022-11-16 11:34:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:34:16,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:16,978 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:16,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:34:17,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:17,179 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:34:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1580517824, now seen corresponding path program 1 times [2022-11-16 11:34:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526929166] [2022-11-16 11:34:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:17,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:17,181 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:34:17,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:17,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:34:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:17,824 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:34:17,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:34:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:18,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:19,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:19,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526929166] [2022-11-16 11:34:19,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526929166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:19,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:19,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:34:19,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409443925] [2022-11-16 11:34:19,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:34:19,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:34:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:34:19,018 INFO L87 Difference]: Start difference. First operand 8350 states and 38730 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:21,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:34:23,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:34:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:26,379 INFO L93 Difference]: Finished difference Result 8627 states and 39483 transitions. [2022-11-16 11:34:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:34:26,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:34:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:26,415 INFO L225 Difference]: With dead ends: 8627 [2022-11-16 11:34:26,415 INFO L226 Difference]: Without dead ends: 8627 [2022-11-16 11:34:26,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:34:26,416 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 201 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:26,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 0 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 402 Invalid, 0 Unknown, 140 Unchecked, 6.8s Time] [2022-11-16 11:34:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8627 states. [2022-11-16 11:34:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8627 to 8367. [2022-11-16 11:34:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8367 states, 8344 states have (on average 4.653283796740173) internal successors, (38827), 8366 states have internal predecessors, (38827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 38827 transitions. [2022-11-16 11:34:26,738 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 38827 transitions. Word has length 15 [2022-11-16 11:34:26,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:26,738 INFO L495 AbstractCegarLoop]: Abstraction has 8367 states and 38827 transitions. [2022-11-16 11:34:26,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 38827 transitions. [2022-11-16 11:34:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:34:26,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:26,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:26,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:26,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:26,942 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:34:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1579744064, now seen corresponding path program 1 times [2022-11-16 11:34:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:26,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141405153] [2022-11-16 11:34:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:26,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:26,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:26,944 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:34:26,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:34:27,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:27,616 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:34:27,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:34:27,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:28,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:28,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141405153] [2022-11-16 11:34:28,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141405153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:28,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:28,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-11-16 11:34:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304950501] [2022-11-16 11:34:28,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:34:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:34:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:34:28,824 INFO L87 Difference]: Start difference. First operand 8367 states and 38827 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:31,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:34:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:36,312 INFO L93 Difference]: Finished difference Result 8583 states and 39199 transitions. [2022-11-16 11:34:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:34:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:34:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:36,348 INFO L225 Difference]: With dead ends: 8583 [2022-11-16 11:34:36,348 INFO L226 Difference]: Without dead ends: 8583 [2022-11-16 11:34:36,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:34:36,349 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:36,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 449 Invalid, 0 Unknown, 145 Unchecked, 7.0s Time] [2022-11-16 11:34:36,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2022-11-16 11:34:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 8323. [2022-11-16 11:34:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8300 states have (on average 4.643734939759036) internal successors, (38543), 8322 states have internal predecessors, (38543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 38543 transitions. [2022-11-16 11:34:36,557 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 38543 transitions. Word has length 15 [2022-11-16 11:34:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:36,558 INFO L495 AbstractCegarLoop]: Abstraction has 8323 states and 38543 transitions. [2022-11-16 11:34:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 38543 transitions. [2022-11-16 11:34:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:34:36,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:36,561 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:36,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:36,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:36,762 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:34:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:36,762 INFO L85 PathProgramCache]: Analyzing trace with hash 252310653, now seen corresponding path program 1 times [2022-11-16 11:34:36,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:34:36,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280015597] [2022-11-16 11:34:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:36,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:34:36,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:34:36,764 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:34:36,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:34:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:34:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:37,437 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:34:37,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:34:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:37,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:39,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:34:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280015597] [2022-11-16 11:34:39,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280015597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:39,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:39,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:34:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067557345] [2022-11-16 11:34:39,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:39,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:34:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:34:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:34:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:34:39,532 INFO L87 Difference]: Start difference. First operand 8323 states and 38543 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:45,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:35:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:02,377 INFO L93 Difference]: Finished difference Result 27684 states and 124477 transitions. [2022-11-16 11:35:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:35:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:35:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:02,510 INFO L225 Difference]: With dead ends: 27684 [2022-11-16 11:35:02,510 INFO L226 Difference]: Without dead ends: 27684 [2022-11-16 11:35:02,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:35:02,511 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 738 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:02,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 0 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1546 Invalid, 0 Unknown, 169 Unchecked, 18.9s Time] [2022-11-16 11:35:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27684 states. [2022-11-16 11:35:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27684 to 10981. [2022-11-16 11:35:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10981 states, 10958 states have (on average 4.811461945610513) internal successors, (52724), 10980 states have internal predecessors, (52724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10981 states to 10981 states and 52724 transitions. [2022-11-16 11:35:02,996 INFO L78 Accepts]: Start accepts. Automaton has 10981 states and 52724 transitions. Word has length 15 [2022-11-16 11:35:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:02,996 INFO L495 AbstractCegarLoop]: Abstraction has 10981 states and 52724 transitions. [2022-11-16 11:35:02,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 10981 states and 52724 transitions. [2022-11-16 11:35:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:35:03,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:03,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:03,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-16 11:35:03,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:35:03,201 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:35:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash -364110899, now seen corresponding path program 1 times [2022-11-16 11:35:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:35:03,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068319660] [2022-11-16 11:35:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:03,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:35:03,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:35:03,202 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:35:03,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:35:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:03,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:35:03,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:03,868 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:35:03,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:35:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:35:04,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:05,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:35:05,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068319660] [2022-11-16 11:35:05,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068319660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:05,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:35:05,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:35:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864402158] [2022-11-16 11:35:05,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:35:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:35:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:35:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:35:05,838 INFO L87 Difference]: Start difference. First operand 10981 states and 52724 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:10,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:35:15,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:35:19,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:35:28,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:35:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:33,325 INFO L93 Difference]: Finished difference Result 38904 states and 175715 transitions. [2022-11-16 11:35:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:35:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:35:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:33,518 INFO L225 Difference]: With dead ends: 38904 [2022-11-16 11:35:33,519 INFO L226 Difference]: Without dead ends: 38904 [2022-11-16 11:35:33,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:35:33,519 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 686 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 720 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:33,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 0 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1446 Invalid, 0 Unknown, 720 Unchecked, 23.0s Time] [2022-11-16 11:35:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38904 states. [2022-11-16 11:35:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38904 to 13360. [2022-11-16 11:35:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13360 states, 13337 states have (on average 4.855814650970983) internal successors, (64762), 13359 states have internal predecessors, (64762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13360 states to 13360 states and 64762 transitions. [2022-11-16 11:35:34,220 INFO L78 Accepts]: Start accepts. Automaton has 13360 states and 64762 transitions. Word has length 15 [2022-11-16 11:35:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:34,220 INFO L495 AbstractCegarLoop]: Abstraction has 13360 states and 64762 transitions. [2022-11-16 11:35:34,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 13360 states and 64762 transitions. [2022-11-16 11:35:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:35:34,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:34,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:34,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:35:34,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:35:34,424 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:35:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash -530835155, now seen corresponding path program 2 times [2022-11-16 11:35:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:35:34,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955942983] [2022-11-16 11:35:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:35:34,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:35:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:35:34,426 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:35:34,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:35:34,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:35:34,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:35:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:35:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:35,133 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:35:35,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:35:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:35,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:37,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:35:37,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955942983] [2022-11-16 11:35:37,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955942983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:37,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:35:37,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:35:37,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493190454] [2022-11-16 11:35:37,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:37,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:35:37,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:35:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:35:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:35:37,150 INFO L87 Difference]: Start difference. First operand 13360 states and 64762 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:40,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:35:44,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:35:45,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:00,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:01,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:04,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:06,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:08,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:19,320 INFO L93 Difference]: Finished difference Result 50652 states and 236823 transitions. [2022-11-16 11:36:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:36:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:36:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:19,647 INFO L225 Difference]: With dead ends: 50652 [2022-11-16 11:36:19,648 INFO L226 Difference]: Without dead ends: 50652 [2022-11-16 11:36:19,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:36:19,648 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 586 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 37.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:19,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 0 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2757 Invalid, 1 Unknown, 233 Unchecked, 37.5s Time] [2022-11-16 11:36:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50652 states. [2022-11-16 11:36:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50652 to 15988. [2022-11-16 11:36:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15988 states, 15965 states have (on average 5.028813028499844) internal successors, (80285), 15987 states have internal predecessors, (80285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15988 states to 15988 states and 80285 transitions. [2022-11-16 11:36:20,764 INFO L78 Accepts]: Start accepts. Automaton has 15988 states and 80285 transitions. Word has length 15 [2022-11-16 11:36:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:20,764 INFO L495 AbstractCegarLoop]: Abstraction has 15988 states and 80285 transitions. [2022-11-16 11:36:20,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 15988 states and 80285 transitions. [2022-11-16 11:36:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:36:20,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:20,770 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:20,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:36:20,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:36:20,976 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:36:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash -531476737, now seen corresponding path program 2 times [2022-11-16 11:36:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:36:20,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036962166] [2022-11-16 11:36:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:36:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:36:20,978 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:36:20,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:36:21,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:36:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:21,565 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:36:21,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:36:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:36:21,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:23,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:36:23,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036962166] [2022-11-16 11:36:23,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036962166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:23,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:23,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:36:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850709762] [2022-11-16 11:36:23,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:23,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:36:23,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:36:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:36:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:36:23,397 INFO L87 Difference]: Start difference. First operand 15988 states and 80285 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:26,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:30,646 INFO L93 Difference]: Finished difference Result 17238 states and 80279 transitions. [2022-11-16 11:36:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:36:30,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:36:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:30,741 INFO L225 Difference]: With dead ends: 17238 [2022-11-16 11:36:30,741 INFO L226 Difference]: Without dead ends: 17238 [2022-11-16 11:36:30,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:36:30,742 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 299 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:30,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 0 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 784 Invalid, 0 Unknown, 419 Unchecked, 6.2s Time] [2022-11-16 11:36:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17238 states. [2022-11-16 11:36:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17238 to 11908. [2022-11-16 11:36:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11908 states, 11885 states have (on average 4.850315523769457) internal successors, (57646), 11907 states have internal predecessors, (57646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11908 states to 11908 states and 57646 transitions. [2022-11-16 11:36:31,245 INFO L78 Accepts]: Start accepts. Automaton has 11908 states and 57646 transitions. Word has length 15 [2022-11-16 11:36:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:31,245 INFO L495 AbstractCegarLoop]: Abstraction has 11908 states and 57646 transitions. [2022-11-16 11:36:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 11908 states and 57646 transitions. [2022-11-16 11:36:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:36:31,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:31,250 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:31,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-16 11:36:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:36:31,451 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:36:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1030058637, now seen corresponding path program 1 times [2022-11-16 11:36:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:36:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410549007] [2022-11-16 11:36:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:31,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:36:31,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:36:31,453 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:36:31,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:36:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:36:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:32,070 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:36:32,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:36:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:32,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:33,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:36:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410549007] [2022-11-16 11:36:33,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410549007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:33,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:33,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:36:33,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887384659] [2022-11-16 11:36:33,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:33,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:36:33,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:36:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:36:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:36:33,809 INFO L87 Difference]: Start difference. First operand 11908 states and 57646 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:37,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:39,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:41,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:43,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:48,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:36:51,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:03,010 INFO L93 Difference]: Finished difference Result 35572 states and 158727 transitions. [2022-11-16 11:37:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:37:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:37:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:03,179 INFO L225 Difference]: With dead ends: 35572 [2022-11-16 11:37:03,179 INFO L226 Difference]: Without dead ends: 35564 [2022-11-16 11:37:03,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:37:03,179 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1330 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:03,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 0 Invalid, 2067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1467 Invalid, 0 Unknown, 575 Unchecked, 23.7s Time] [2022-11-16 11:37:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35564 states. [2022-11-16 11:37:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35564 to 13612. [2022-11-16 11:37:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13612 states, 13589 states have (on average 4.881521819118404) internal successors, (66335), 13611 states have internal predecessors, (66335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13612 states to 13612 states and 66335 transitions. [2022-11-16 11:37:03,877 INFO L78 Accepts]: Start accepts. Automaton has 13612 states and 66335 transitions. Word has length 15 [2022-11-16 11:37:03,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:03,877 INFO L495 AbstractCegarLoop]: Abstraction has 13612 states and 66335 transitions. [2022-11-16 11:37:03,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 13612 states and 66335 transitions. [2022-11-16 11:37:03,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:37:03,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:03,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:03,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:37:04,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:04,098 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:37:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:04,098 INFO L85 PathProgramCache]: Analyzing trace with hash 413637085, now seen corresponding path program 1 times [2022-11-16 11:37:04,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:04,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721942944] [2022-11-16 11:37:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:04,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:04,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:04,099 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:37:04,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:37:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:37:04,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:04,685 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:37:04,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:37:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:06,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721942944] [2022-11-16 11:37:06,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721942944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:06,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:06,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:37:06,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950424642] [2022-11-16 11:37:06,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:37:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:37:06,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:37:06,265 INFO L87 Difference]: Start difference. First operand 13612 states and 66335 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:15,497 INFO L93 Difference]: Finished difference Result 26276 states and 121336 transitions. [2022-11-16 11:37:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:37:15,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:37:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:15,632 INFO L225 Difference]: With dead ends: 26276 [2022-11-16 11:37:15,632 INFO L226 Difference]: Without dead ends: 26276 [2022-11-16 11:37:15,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:37:15,633 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 470 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 889 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:15,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 0 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1195 Invalid, 0 Unknown, 889 Unchecked, 7.7s Time] [2022-11-16 11:37:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26276 states. [2022-11-16 11:37:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26276 to 13966. [2022-11-16 11:37:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13966 states, 13943 states have (on average 4.895933443304884) internal successors, (68264), 13965 states have internal predecessors, (68264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13966 states to 13966 states and 68264 transitions. [2022-11-16 11:37:16,226 INFO L78 Accepts]: Start accepts. Automaton has 13966 states and 68264 transitions. Word has length 15 [2022-11-16 11:37:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:16,226 INFO L495 AbstractCegarLoop]: Abstraction has 13966 states and 68264 transitions. [2022-11-16 11:37:16,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13966 states and 68264 transitions. [2022-11-16 11:37:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:37:16,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:16,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:16,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:37:16,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:16,434 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:37:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash 246912017, now seen corresponding path program 3 times [2022-11-16 11:37:16,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:16,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899076087] [2022-11-16 11:37:16,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:37:16,435 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:16,436 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:37:16,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:37:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:37:16,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:37:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:17,083 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:37:17,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:37:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:17,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:17,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899076087] [2022-11-16 11:37:17,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899076087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:17,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:17,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 11:37:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656044388] [2022-11-16 11:37:17,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:17,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:37:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:37:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:37:17,809 INFO L87 Difference]: Start difference. First operand 13966 states and 68264 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:19,907 INFO L93 Difference]: Finished difference Result 14834 states and 71377 transitions. [2022-11-16 11:37:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:37:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:37:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:20,020 INFO L225 Difference]: With dead ends: 14834 [2022-11-16 11:37:20,020 INFO L226 Difference]: Without dead ends: 14834 [2022-11-16 11:37:20,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:37:20,021 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 276 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:20,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 0 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 360 Invalid, 0 Unknown, 121 Unchecked, 1.5s Time] [2022-11-16 11:37:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14834 states. [2022-11-16 11:37:20,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14834 to 13993. [2022-11-16 11:37:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13993 states, 13970 states have (on average 4.893700787401575) internal successors, (68365), 13992 states have internal predecessors, (68365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13993 states to 13993 states and 68365 transitions. [2022-11-16 11:37:20,514 INFO L78 Accepts]: Start accepts. Automaton has 13993 states and 68365 transitions. Word has length 15 [2022-11-16 11:37:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:20,514 INFO L495 AbstractCegarLoop]: Abstraction has 13993 states and 68365 transitions. [2022-11-16 11:37:20,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 13993 states and 68365 transitions. [2022-11-16 11:37:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:37:20,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:20,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:20,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:37:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:20,721 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:37:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1354572763, now seen corresponding path program 2 times [2022-11-16 11:37:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:20,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757997976] [2022-11-16 11:37:20,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:37:20,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:20,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:20,723 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:37:20,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:37:21,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:37:21,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:37:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:21,298 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:37:21,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 11:37:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:21,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:22,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:37:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757997976] [2022-11-16 11:37:22,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757997976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:22,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:22,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-11-16 11:37:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247741140] [2022-11-16 11:37:22,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:37:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:37:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:37:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:37:22,965 INFO L87 Difference]: Start difference. First operand 13993 states and 68365 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:27,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:29,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:31,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:37:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:42,630 INFO L93 Difference]: Finished difference Result 35239 states and 161951 transitions. [2022-11-16 11:37:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:37:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:37:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:42,873 INFO L225 Difference]: With dead ends: 35239 [2022-11-16 11:37:42,873 INFO L226 Difference]: Without dead ends: 35239 [2022-11-16 11:37:42,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:37:42,874 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 764 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:42,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 0 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1456 Invalid, 0 Unknown, 210 Unchecked, 15.5s Time] [2022-11-16 11:37:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35239 states. [2022-11-16 11:37:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35239 to 13987. [2022-11-16 11:37:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13987 states, 13964 states have (on average 4.885920939558866) internal successors, (68227), 13986 states have internal predecessors, (68227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13987 states to 13987 states and 68227 transitions. [2022-11-16 11:37:43,609 INFO L78 Accepts]: Start accepts. Automaton has 13987 states and 68227 transitions. Word has length 15 [2022-11-16 11:37:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:43,609 INFO L495 AbstractCegarLoop]: Abstraction has 13987 states and 68227 transitions. [2022-11-16 11:37:43,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 13987 states and 68227 transitions. [2022-11-16 11:37:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:37:43,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:43,616 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:43,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-16 11:37:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:43,816 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-16 11:37:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 46213949, now seen corresponding path program 3 times [2022-11-16 11:37:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:37:43,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778692300] [2022-11-16 11:37:43,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:37:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:37:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:37:43,818 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:37:43,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7259d9a2-7b01-45b1-81e5-a5175e8acae8/bin/uautomizer-tPACEb0tL8/mathsat -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 11:37:44,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:37:44,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:37:44,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:44,480 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-16 11:37:44,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-16 11:37:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:44,837 INFO L328 TraceCheckSpWp]: Computing backward predicates...