./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/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_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/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_5ca1f796-2761-41e3-82fb-6fbda70e9001/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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --- 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 11:14:29,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:14:29,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:14:29,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:14:29,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:14:29,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:14:29,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:14:29,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:14:29,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:14:29,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:14:29,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:14:29,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:14:29,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:14:29,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:14:29,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:14:29,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:14:29,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:14:29,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:14:29,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:14:29,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:14:29,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:14:29,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:14:29,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:14:29,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:14:29,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:14:29,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:14:29,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:14:29,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:14:29,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:14:29,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:14:29,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:14:29,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:14:29,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:14:29,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:14:29,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:14:29,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:14:29,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:14:29,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:14:29,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:14:29,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:14:29,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:14:29,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:14:29,863 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:14:29,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:14:29,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:14:29,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:14:29,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:14:29,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:14:29,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:14:29,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:14:29,866 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:14:29,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:14:29,867 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:14:29,868 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:14:29,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:14:29,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:14:29,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:14:29,868 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:14:29,869 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:14:29,869 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:14:29,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:14:29,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:14:29,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:14:29,870 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:14:29,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:14:29,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:14:29,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:14:29,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:14:29,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:14:29,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:14:29,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:14:29,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:14:29,872 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_5ca1f796-2761-41e3-82fb-6fbda70e9001/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 [2022-11-16 11:14:30,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:14:30,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:14:30,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:14:30,232 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:14:30,232 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:14:30,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-16 11:14:30,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/d5b0d5fa1/e1fae019ecce4c9093f9c91fee708946/FLAG723cd6868 [2022-11-16 11:14:30,868 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:14:30,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-16 11:14:30,878 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/d5b0d5fa1/e1fae019ecce4c9093f9c91fee708946/FLAG723cd6868 [2022-11-16 11:14:31,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/d5b0d5fa1/e1fae019ecce4c9093f9c91fee708946 [2022-11-16 11:14:31,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:14:31,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:14:31,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:31,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:14:31,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:14:31,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:31" (1/1) ... [2022-11-16 11:14:31,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f33596a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:31, skipping insertion in model container [2022-11-16 11:14:31,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:31" (1/1) ... [2022-11-16 11:14:31,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:14:31,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:14:31,474 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_5ca1f796-2761-41e3-82fb-6fbda70e9001/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-16 11:14:31,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:31,492 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 11:14:31,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6832721f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:31, skipping insertion in model container [2022-11-16 11:14:31,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:31,494 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:14:31,496 INFO L158 Benchmark]: Toolchain (without parser) took 284.12ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 120.4MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 11:14:31,496 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 92.3MB. Free memory is still 49.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:14:31,497 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.36ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 120.4MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 11:14:31,499 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 92.3MB. Free memory is still 49.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.36ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 120.4MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 106]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/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_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/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_5ca1f796-2761-41e3-82fb-6fbda70e9001/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 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 --- 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 11:14:33,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:14:33,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:14:33,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:14:33,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:14:33,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:14:33,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:14:33,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:14:33,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:14:33,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:14:33,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:14:33,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:14:33,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:14:33,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:14:33,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:14:33,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:14:33,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:14:33,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:14:33,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:14:33,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:14:33,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:14:33,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:14:33,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:14:33,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:14:33,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:14:33,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:14:33,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:14:33,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:14:33,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:14:33,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:14:33,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:14:33,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:14:33,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:14:33,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:14:33,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:14:33,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:14:33,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:14:33,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:14:33,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:14:33,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:14:33,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:14:33,713 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:14:33,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:14:33,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:14:33,739 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:14:33,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:14:33,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:14:33,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:14:33,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:14:33,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:14:33,741 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:14:33,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:14:33,742 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:14:33,742 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:14:33,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:14:33,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:14:33,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:14:33,743 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:14:33,743 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:14:33,743 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:14:33,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:14:33,744 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:14:33,744 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:14:33,744 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:14:33,744 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:14:33,744 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:14:33,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:14:33,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:14:33,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:14:33,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:14:33,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:14:33,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:14:33,746 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:14:33,746 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:14:33,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:14:33,747 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_5ca1f796-2761-41e3-82fb-6fbda70e9001/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9eb5d9094342cfaa74d8ea4903febd735be5757c093d69b0f8dbb2a26886fda6 [2022-11-16 11:14:34,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:14:34,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:14:34,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:14:34,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:14:34,142 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:14:34,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-16 11:14:34,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/d9097b249/5ce1372835ba4f04a0ba694db3b774cb/FLAG2f4b8a02c [2022-11-16 11:14:34,733 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:14:34,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2022-11-16 11:14:34,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/d9097b249/5ce1372835ba4f04a0ba694db3b774cb/FLAG2f4b8a02c [2022-11-16 11:14:35,085 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/data/d9097b249/5ce1372835ba4f04a0ba694db3b774cb [2022-11-16 11:14:35,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:14:35,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:14:35,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:35,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:14:35,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:14:35,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@227121b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35, skipping insertion in model container [2022-11-16 11:14:35,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:14:35,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:14:35,303 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_5ca1f796-2761-41e3-82fb-6fbda70e9001/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-16 11:14:35,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:35,361 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:14:35,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:14:35,396 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_5ca1f796-2761-41e3-82fb-6fbda70e9001/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-16 11:14:35,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:35,415 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:14:35,454 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_5ca1f796-2761-41e3-82fb-6fbda70e9001/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2022-11-16 11:14:35,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:14:35,485 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:14:35,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35 WrapperNode [2022-11-16 11:14:35,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:14:35,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:14:35,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:14:35,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:14:35,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,569 INFO L138 Inliner]: procedures = 27, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 261 [2022-11-16 11:14:35,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:14:35,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:14:35,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:14:35,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:14:35,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:14:35,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:14:35,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:14:35,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:14:35,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (1/1) ... [2022-11-16 11:14:35,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:14:35,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:35,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:14:35,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:14:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:14:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:14:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:14:35,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:14:35,735 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:14:35,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:14:35,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:14:35,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:14:35,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 11:14:35,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 11:14:35,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:14:35,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:14:35,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:14:35,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:14:35,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:14:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:14:35,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 11:14:35,739 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 11:14:35,939 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:14:35,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:14:36,771 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:14:37,254 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:14:37,254 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 11:14:37,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:14:37 BoogieIcfgContainer [2022-11-16 11:14:37,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:14:37,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:14:37,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:14:37,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:14:37,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:14:35" (1/3) ... [2022-11-16 11:14:37,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b6a04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:14:37, skipping insertion in model container [2022-11-16 11:14:37,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:14:35" (2/3) ... [2022-11-16 11:14:37,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b6a04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:14:37, skipping insertion in model container [2022-11-16 11:14:37,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:14:37" (3/3) ... [2022-11-16 11:14:37,270 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2022-11-16 11:14:37,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:14:37,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-16 11:14:37,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:14:37,446 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:14:37,496 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:14:37,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 221 transitions, 466 flow [2022-11-16 11:14:37,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 221 transitions, 466 flow [2022-11-16 11:14:37,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 221 transitions, 466 flow [2022-11-16 11:14:37,652 INFO L130 PetriNetUnfolder]: 16/218 cut-off events. [2022-11-16 11:14:37,653 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 11:14:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 218 events. 16/218 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 229 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 167. Up to 2 conditions per place. [2022-11-16 11:14:37,680 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-16 11:15:24,167 INFO L134 LiptonReduction]: Checked pairs total: 3904 [2022-11-16 11:15:24,168 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-16 11:15:24,176 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 59 transitions, 142 flow [2022-11-16 11:15:24,284 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1833 states, 1331 states have (on average 4.844477836213374) internal successors, (6448), 1832 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:24,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:15:24,309 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;@79c3889a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:15:24,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2022-11-16 11:15:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 1833 states, 1331 states have (on average 4.844477836213374) internal successors, (6448), 1832 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:15:24,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:24,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:15:24,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 38768, now seen corresponding path program 1 times [2022-11-16 11:15:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:24,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074788294] [2022-11-16 11:15:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:24,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:24,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:24,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:24,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:15:24,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:24,703 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:15:24,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:15:24,732 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 11:15:24,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:24,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074788294] [2022-11-16 11:15:24,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074788294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:24,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:24,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:15:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563120031] [2022-11-16 11:15:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:24,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:24,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:24,799 INFO L87 Difference]: Start difference. First operand has 1833 states, 1331 states have (on average 4.844477836213374) internal successors, (6448), 1832 states have internal predecessors, (6448), 0 states have call successors, (0), 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 11:15:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:25,259 INFO L93 Difference]: Finished difference Result 1830 states and 6445 transitions. [2022-11-16 11:15:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:25,264 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 11:15:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:25,293 INFO L225 Difference]: With dead ends: 1830 [2022-11-16 11:15:25,293 INFO L226 Difference]: Without dead ends: 1830 [2022-11-16 11:15:25,294 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 11:15:25,298 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:25,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:15:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-11-16 11:15:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1830. [2022-11-16 11:15:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1331 states have (on average 4.842223891810669) internal successors, (6445), 1829 states have internal predecessors, (6445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6445 transitions. [2022-11-16 11:15:25,426 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6445 transitions. Word has length 2 [2022-11-16 11:15:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:25,427 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 6445 transitions. [2022-11-16 11:15:25,427 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 11:15:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6445 transitions. [2022-11-16 11:15:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 11:15:25,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:25,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 11:15:25,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:25,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:25,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 38769, now seen corresponding path program 1 times [2022-11-16 11:15:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:25,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839340960] [2022-11-16 11:15:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:25,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:25,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:25,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:25,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:15:25,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:25,934 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:15:25,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:15:25,982 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 11:15:25,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:25,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839340960] [2022-11-16 11:15:25,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839340960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:25,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:25,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:15:25,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368994785] [2022-11-16 11:15:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:25,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:25,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:25,986 INFO L87 Difference]: Start difference. First operand 1830 states and 6445 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 11:15:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:26,742 INFO L93 Difference]: Finished difference Result 3657 states and 12887 transitions. [2022-11-16 11:15:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:26,742 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 11:15:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:26,778 INFO L225 Difference]: With dead ends: 3657 [2022-11-16 11:15:26,778 INFO L226 Difference]: Without dead ends: 3657 [2022-11-16 11:15:26,778 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 11:15:26,784 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:26,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:15:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3657 states. [2022-11-16 11:15:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3657 to 1832. [2022-11-16 11:15:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1333 states have (on average 4.8394598649662415) internal successors, (6451), 1831 states have internal predecessors, (6451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6451 transitions. [2022-11-16 11:15:26,920 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6451 transitions. Word has length 2 [2022-11-16 11:15:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:26,920 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 6451 transitions. [2022-11-16 11:15:26,920 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 11:15:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6451 transitions. [2022-11-16 11:15:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:15:26,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:26,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:15:26,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:27,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:27,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1208445, now seen corresponding path program 1 times [2022-11-16 11:15:27,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:27,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792689203] [2022-11-16 11:15:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:27,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:27,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:27,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:27,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:27,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:15:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:27,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:27,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:27,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792689203] [2022-11-16 11:15:27,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792689203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:27,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:27,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:15:27,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218472933] [2022-11-16 11:15:27,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:27,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:15:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:15:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:15:27,266 INFO L87 Difference]: Start difference. First operand 1832 states and 6451 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:27,847 INFO L93 Difference]: Finished difference Result 1833 states and 6448 transitions. [2022-11-16 11:15:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:15:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:15:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:27,862 INFO L225 Difference]: With dead ends: 1833 [2022-11-16 11:15:27,862 INFO L226 Difference]: Without dead ends: 1832 [2022-11-16 11:15:27,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 11:15:27,868 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:27,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:15:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-11-16 11:15:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1832. [2022-11-16 11:15:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1333 states have (on average 4.836459114778695) internal successors, (6447), 1831 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6447 transitions. [2022-11-16 11:15:27,992 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6447 transitions. Word has length 3 [2022-11-16 11:15:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:27,992 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 6447 transitions. [2022-11-16 11:15:27,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6447 transitions. [2022-11-16 11:15:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:15:27,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:27,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:15:28,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:28,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:28,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1206818, now seen corresponding path program 1 times [2022-11-16 11:15:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:28,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30952467] [2022-11-16 11:15:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:28,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:28,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:28,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:28,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:15:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:28,455 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:15:28,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:15:28,570 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 11:15:28,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:28,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30952467] [2022-11-16 11:15:28,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30952467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:28,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:28,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 11:15:28,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565123046] [2022-11-16 11:15:28,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:28,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:15:28,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:15:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:15:28,832 INFO L87 Difference]: Start difference. First operand 1832 states and 6447 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 11:15:30,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:15:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:31,871 INFO L93 Difference]: Finished difference Result 3663 states and 12901 transitions. [2022-11-16 11:15:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:15:31,872 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 11:15:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:31,899 INFO L225 Difference]: With dead ends: 3663 [2022-11-16 11:15:31,900 INFO L226 Difference]: Without dead ends: 3663 [2022-11-16 11:15:31,900 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 11:15:31,901 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 187 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:31,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 9 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 11:15:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2022-11-16 11:15:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 1838. [2022-11-16 11:15:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1339 states have (on average 4.82823002240478) internal successors, (6465), 1837 states have internal predecessors, (6465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 6465 transitions. [2022-11-16 11:15:32,027 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 6465 transitions. Word has length 3 [2022-11-16 11:15:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:32,027 INFO L495 AbstractCegarLoop]: Abstraction has 1838 states and 6465 transitions. [2022-11-16 11:15:32,027 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 11:15:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 6465 transitions. [2022-11-16 11:15:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:15:32,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:32,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:15:32,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:32,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:32,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1159956856, now seen corresponding path program 1 times [2022-11-16 11:15:32,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:32,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101189976] [2022-11-16 11:15:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:32,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:32,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:15:32,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:32,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:32,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:32,585 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-16 11:15:32,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-16 11:15:32,622 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:15:32,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 11:15:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:32,944 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-16 11:15:32,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 11:15:33,117 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 11:15:33,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:33,472 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 11:15:33,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101189976] [2022-11-16 11:15:33,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101189976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:33,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:33,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:15:33,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916202746] [2022-11-16 11:15:33,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:33,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:15:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:15:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:33,474 INFO L87 Difference]: Start difference. First operand 1838 states and 6465 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 11:15:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:34,190 INFO L93 Difference]: Finished difference Result 1848 states and 6493 transitions. [2022-11-16 11:15:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:15:34,191 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 11:15:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:34,205 INFO L225 Difference]: With dead ends: 1848 [2022-11-16 11:15:34,205 INFO L226 Difference]: Without dead ends: 1848 [2022-11-16 11:15:34,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:34,206 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:34,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 147 Unchecked, 0.7s Time] [2022-11-16 11:15:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-11-16 11:15:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1843. [2022-11-16 11:15:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1344 states have (on average 4.820684523809524) internal successors, (6479), 1842 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 6479 transitions. [2022-11-16 11:15:34,292 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 6479 transitions. Word has length 5 [2022-11-16 11:15:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:34,293 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 6479 transitions. [2022-11-16 11:15:34,293 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 11:15:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 6479 transitions. [2022-11-16 11:15:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:15:34,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:34,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:15:34,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-16 11:15:34,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:34,506 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:34,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:34,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1159956858, now seen corresponding path program 1 times [2022-11-16 11:15:34,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:34,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29044438] [2022-11-16 11:15:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:34,507 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 11:15:34,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:34,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:34,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:34,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:15:34,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:34,794 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 11:15:34,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 11:15:34,918 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:15:34,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:15:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:15:34,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:34,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:34,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29044438] [2022-11-16 11:15:34,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29044438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:34,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:34,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:15:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974151018] [2022-11-16 11:15:34,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:34,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:34,948 INFO L87 Difference]: Start difference. First operand 1843 states and 6479 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 11:15:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:35,231 INFO L93 Difference]: Finished difference Result 1842 states and 6471 transitions. [2022-11-16 11:15:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:35,232 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 11:15:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:35,244 INFO L225 Difference]: With dead ends: 1842 [2022-11-16 11:15:35,245 INFO L226 Difference]: Without dead ends: 1842 [2022-11-16 11:15:35,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:35,246 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:35,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-11-16 11:15:35,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-11-16 11:15:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1842. [2022-11-16 11:15:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1344 states have (on average 4.814732142857143) internal successors, (6471), 1841 states have internal predecessors, (6471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 6471 transitions. [2022-11-16 11:15:35,321 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 6471 transitions. Word has length 5 [2022-11-16 11:15:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:35,322 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 6471 transitions. [2022-11-16 11:15:35,322 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 11:15:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 6471 transitions. [2022-11-16 11:15:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:15:35,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:35,323 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 11:15:35,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:35,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:35,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1597520817, now seen corresponding path program 2 times [2022-11-16 11:15:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:35,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899869711] [2022-11-16 11:15:35,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:15:35,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:35,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:35,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:35,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:15:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:35,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:15:35,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:35,810 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:15:35,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:15:36,114 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 11:15:36,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:36,890 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 11:15:36,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:36,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899869711] [2022-11-16 11:15:36,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899869711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:36,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:36,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:15:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610066081] [2022-11-16 11:15:36,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:15:36,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:15:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:15:36,893 INFO L87 Difference]: Start difference. First operand 1842 states and 6471 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 11:15:40,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:15:42,759 WARN L539 Checker$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 11:15:44,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:15:46,763 WARN L539 Checker$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 11:15:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:50,450 INFO L93 Difference]: Finished difference Result 10972 states and 38673 transitions. [2022-11-16 11:15:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:15:50,452 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 11:15:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:50,525 INFO L225 Difference]: With dead ends: 10972 [2022-11-16 11:15:50,525 INFO L226 Difference]: Without dead ends: 10972 [2022-11-16 11:15:50,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:15:50,526 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 988 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 44 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:50,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 72 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1111 Invalid, 4 Unknown, 0 Unchecked, 12.2s Time] [2022-11-16 11:15:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2022-11-16 11:15:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 1852. [2022-11-16 11:15:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1354 states have (on average 4.795420974889217) internal successors, (6493), 1851 states have internal predecessors, (6493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6493 transitions. [2022-11-16 11:15:50,740 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6493 transitions. Word has length 6 [2022-11-16 11:15:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:50,740 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 6493 transitions. [2022-11-16 11:15:50,740 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 11:15:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6493 transitions. [2022-11-16 11:15:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:15:50,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:50,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:50,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:50,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:50,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1972926851, now seen corresponding path program 1 times [2022-11-16 11:15:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:50,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130540366] [2022-11-16 11:15:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:50,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:50,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:50,993 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:51,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:15:51,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:51,268 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 11:15:51,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 11:15:51,637 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 11:15:51,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 11:15:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:15:51,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:51,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:51,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130540366] [2022-11-16 11:15:51,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130540366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:51,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:51,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:15:51,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320131802] [2022-11-16 11:15:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:51,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:51,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:51,840 INFO L87 Difference]: Start difference. First operand 1852 states and 6493 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 11:15:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:52,060 INFO L93 Difference]: Finished difference Result 1852 states and 6499 transitions. [2022-11-16 11:15:52,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:52,061 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 11:15:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:52,078 INFO L225 Difference]: With dead ends: 1852 [2022-11-16 11:15:52,079 INFO L226 Difference]: Without dead ends: 1852 [2022-11-16 11:15:52,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:52,081 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:52,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-16 11:15:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-16 11:15:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1852. [2022-11-16 11:15:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1354 states have (on average 4.799852289512556) internal successors, (6499), 1851 states have internal predecessors, (6499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6499 transitions. [2022-11-16 11:15:52,144 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6499 transitions. Word has length 7 [2022-11-16 11:15:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:52,145 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 6499 transitions. [2022-11-16 11:15:52,145 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 11:15:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6499 transitions. [2022-11-16 11:15:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:15:52,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:52,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:52,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:52,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:52,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1972926850, now seen corresponding path program 1 times [2022-11-16 11:15:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:52,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249918181] [2022-11-16 11:15:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:52,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:52,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:52,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:52,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:52,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:15:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:52,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:52,662 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 11:15:52,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-16 11:15:52,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 11:15:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:52,908 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-16 11:15:52,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 11:15:53,144 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 11:15:53,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:53,522 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 11:15:53,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249918181] [2022-11-16 11:15:53,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249918181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:53,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:53,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:15:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938289417] [2022-11-16 11:15:53,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:15:53,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:15:53,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:53,524 INFO L87 Difference]: Start difference. First operand 1852 states and 6499 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 11:15:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:54,011 INFO L93 Difference]: Finished difference Result 1865 states and 6533 transitions. [2022-11-16 11:15:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:15:54,012 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 11:15:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:54,023 INFO L225 Difference]: With dead ends: 1865 [2022-11-16 11:15:54,023 INFO L226 Difference]: Without dead ends: 1865 [2022-11-16 11:15:54,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:54,024 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:54,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 24 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 146 Unchecked, 0.5s Time] [2022-11-16 11:15:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-11-16 11:15:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1855. [2022-11-16 11:15:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1357 states have (on average 4.796610169491525) internal successors, (6509), 1854 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6509 transitions. [2022-11-16 11:15:54,106 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6509 transitions. Word has length 7 [2022-11-16 11:15:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:54,107 INFO L495 AbstractCegarLoop]: Abstraction has 1855 states and 6509 transitions. [2022-11-16 11:15:54,107 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 11:15:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6509 transitions. [2022-11-16 11:15:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:15:54,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:54,108 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-16 11:15:54,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:54,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:54,322 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2016411816, now seen corresponding path program 2 times [2022-11-16 11:15:54,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:54,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45702190] [2022-11-16 11:15:54,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:15:54,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:54,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:54,324 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:54,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:54,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:15:54,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:54,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:15:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:54,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:54,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:54,627 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:15:54,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:15:54,676 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 11:15:54,676 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 90 treesize of output 89 [2022-11-16 11:15:54,839 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:15:54,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:15:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:15:54,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:54,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45702190] [2022-11-16 11:15:54,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45702190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:54,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:54,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:15:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15786251] [2022-11-16 11:15:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:54,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:15:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:15:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:15:54,936 INFO L87 Difference]: Start difference. First operand 1855 states and 6509 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:55,213 INFO L93 Difference]: Finished difference Result 1854 states and 6503 transitions. [2022-11-16 11:15:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:15:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:15:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:55,244 INFO L225 Difference]: With dead ends: 1854 [2022-11-16 11:15:55,244 INFO L226 Difference]: Without dead ends: 1854 [2022-11-16 11:15:55,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:15:55,245 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:55,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-11-16 11:15:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2022-11-16 11:15:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1854. [2022-11-16 11:15:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1357 states have (on average 4.792188651436994) internal successors, (6503), 1853 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 6503 transitions. [2022-11-16 11:15:55,324 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 6503 transitions. Word has length 7 [2022-11-16 11:15:55,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:55,324 INFO L495 AbstractCegarLoop]: Abstraction has 1854 states and 6503 transitions. [2022-11-16 11:15:55,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 6503 transitions. [2022-11-16 11:15:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:15:55,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:55,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:55,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:55,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:55,538 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196618, now seen corresponding path program 1 times [2022-11-16 11:15:55,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564517595] [2022-11-16 11:15:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:55,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:55,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:55,542 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:55,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:15:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:55,837 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:15:55,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:15:55,879 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:15:55,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:15:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:15:55,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:55,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564517595] [2022-11-16 11:15:55,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564517595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:55,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:55,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:15:55,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548151093] [2022-11-16 11:15:55,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:55,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:15:55,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:55,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:15:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:15:55,900 INFO L87 Difference]: Start difference. First operand 1854 states and 6503 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 11:15:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:56,223 INFO L93 Difference]: Finished difference Result 1234 states and 4268 transitions. [2022-11-16 11:15:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:15:56,224 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 11:15:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:56,228 INFO L225 Difference]: With dead ends: 1234 [2022-11-16 11:15:56,229 INFO L226 Difference]: Without dead ends: 1234 [2022-11-16 11:15:56,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:15:56,230 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:56,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:15:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-11-16 11:15:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1234. [2022-11-16 11:15:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 960 states have (on average 4.445833333333334) internal successors, (4268), 1233 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4268 transitions. [2022-11-16 11:15:56,306 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4268 transitions. Word has length 8 [2022-11-16 11:15:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:56,307 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 4268 transitions. [2022-11-16 11:15:56,307 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 11:15:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4268 transitions. [2022-11-16 11:15:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:15:56,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:56,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:56,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:56,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:56,518 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:15:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196617, now seen corresponding path program 1 times [2022-11-16 11:15:56,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:56,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385095041] [2022-11-16 11:15:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:56,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:56,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:56,520 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:15:56,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:15:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:56,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:15:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:56,862 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:15:56,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:15:57,022 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:15:57,022 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:15:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:57,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:15:57,177 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:15:57,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:15:57,297 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 11:15:57,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:59,876 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 11:15:59,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:59,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385095041] [2022-11-16 11:15:59,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385095041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:59,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:59,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:15:59,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136603696] [2022-11-16 11:15:59,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:59,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:15:59,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:15:59,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:15:59,878 INFO L87 Difference]: Start difference. First operand 1234 states and 4268 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 11:16:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:00,766 INFO L93 Difference]: Finished difference Result 1244 states and 4289 transitions. [2022-11-16 11:16:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:16:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 11:16:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:00,772 INFO L225 Difference]: With dead ends: 1244 [2022-11-16 11:16:00,772 INFO L226 Difference]: Without dead ends: 1244 [2022-11-16 11:16:00,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:16:00,773 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:00,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 84 Unchecked, 0.7s Time] [2022-11-16 11:16:00,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-11-16 11:16:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1234. [2022-11-16 11:16:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 960 states have (on average 4.444791666666666) internal successors, (4267), 1233 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4267 transitions. [2022-11-16 11:16:00,816 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4267 transitions. Word has length 8 [2022-11-16 11:16:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:00,817 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 4267 transitions. [2022-11-16 11:16:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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 11:16:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4267 transitions. [2022-11-16 11:16:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:16:00,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:00,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:00,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:01,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:01,031 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196616, now seen corresponding path program 1 times [2022-11-16 11:16:01,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:01,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775956411] [2022-11-16 11:16:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:01,032 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 11:16:01,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:01,033 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:01,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:16:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:01,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:16:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:01,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:01,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:01,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775956411] [2022-11-16 11:16:01,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775956411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:01,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:01,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:16:01,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626265854] [2022-11-16 11:16:01,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:01,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:16:01,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:01,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:16:01,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:16:01,201 INFO L87 Difference]: Start difference. First operand 1234 states and 4267 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:01,528 INFO L93 Difference]: Finished difference Result 774 states and 2620 transitions. [2022-11-16 11:16:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:16:01,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:16:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:01,532 INFO L225 Difference]: With dead ends: 774 [2022-11-16 11:16:01,532 INFO L226 Difference]: Without dead ends: 774 [2022-11-16 11:16:01,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:01,533 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:01,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:16:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-16 11:16:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2022-11-16 11:16:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 643 states have (on average 4.074650077760498) internal successors, (2620), 773 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2620 transitions. [2022-11-16 11:16:01,555 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2620 transitions. Word has length 8 [2022-11-16 11:16:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:01,556 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 2620 transitions. [2022-11-16 11:16:01,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2620 transitions. [2022-11-16 11:16:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:16:01,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:01,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:01,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:01,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:01,770 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:01,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1031196615, now seen corresponding path program 1 times [2022-11-16 11:16:01,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078546104] [2022-11-16 11:16:01,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:01,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:01,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:01,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:16:01,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:01,990 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 11:16:01,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:02,224 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 25 treesize of output 21 [2022-11-16 11:16:02,317 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 11:16:02,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:02,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078546104] [2022-11-16 11:16:02,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078546104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:02,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:02,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 11:16:02,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409243307] [2022-11-16 11:16:02,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:02,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:16:02,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:02,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:16:02,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:16:02,320 INFO L87 Difference]: Start difference. First operand 774 states and 2620 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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 11:16:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:03,917 INFO L93 Difference]: Finished difference Result 2504 states and 8509 transitions. [2022-11-16 11:16:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:16:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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 11:16:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:03,927 INFO L225 Difference]: With dead ends: 2504 [2022-11-16 11:16:03,927 INFO L226 Difference]: Without dead ends: 2504 [2022-11-16 11:16:03,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:16:03,928 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 556 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:03,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 17 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:16:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-11-16 11:16:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 896. [2022-11-16 11:16:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 765 states have (on average 4.313725490196078) internal successors, (3300), 895 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3300 transitions. [2022-11-16 11:16:03,974 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3300 transitions. Word has length 8 [2022-11-16 11:16:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:03,975 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 3300 transitions. [2022-11-16 11:16:03,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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 11:16:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3300 transitions. [2022-11-16 11:16:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:03,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:03,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:03,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:04,189 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:04,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1902096588, now seen corresponding path program 1 times [2022-11-16 11:16:04,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:04,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879260911] [2022-11-16 11:16:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:04,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:04,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:04,192 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:04,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:04,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:16:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:04,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:04,521 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:16:04,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-16 11:16:04,545 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 11:16:04,728 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-16 11:16:04,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 11:16:04,954 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 11:16:04,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:05,316 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 11:16:05,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:05,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879260911] [2022-11-16 11:16:05,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879260911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:05,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:05,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:16:05,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574224180] [2022-11-16 11:16:05,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:05,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:16:05,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:05,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:16:05,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:05,318 INFO L87 Difference]: Start difference. First operand 896 states and 3300 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:05,575 INFO L93 Difference]: Finished difference Result 918 states and 3384 transitions. [2022-11-16 11:16:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:05,578 INFO L225 Difference]: With dead ends: 918 [2022-11-16 11:16:05,579 INFO L226 Difference]: Without dead ends: 918 [2022-11-16 11:16:05,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:05,580 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:05,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-11-16 11:16:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-16 11:16:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 902. [2022-11-16 11:16:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 771 states have (on average 4.32166018158236) internal successors, (3332), 901 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3332 transitions. [2022-11-16 11:16:05,630 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3332 transitions. Word has length 9 [2022-11-16 11:16:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:05,631 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 3332 transitions. [2022-11-16 11:16:05,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3332 transitions. [2022-11-16 11:16:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:05,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:05,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:05,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:05,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:05,851 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1902096590, now seen corresponding path program 1 times [2022-11-16 11:16:05,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:05,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048511227] [2022-11-16 11:16:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:05,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:05,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:05,867 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:05,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:16:06,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:06,165 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 11:16:06,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-16 11:16:06,208 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:16:06,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:16:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:06,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:06,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:06,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048511227] [2022-11-16 11:16:06,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048511227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:06,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:06,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:16:06,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193607825] [2022-11-16 11:16:06,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:06,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:16:06,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:16:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:16:06,233 INFO L87 Difference]: Start difference. First operand 902 states and 3332 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:06,516 INFO L93 Difference]: Finished difference Result 867 states and 3218 transitions. [2022-11-16 11:16:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:16:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:06,520 INFO L225 Difference]: With dead ends: 867 [2022-11-16 11:16:06,520 INFO L226 Difference]: Without dead ends: 867 [2022-11-16 11:16:06,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:16:06,521 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:06,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:16:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-16 11:16:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2022-11-16 11:16:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 748 states have (on average 4.302139037433155) internal successors, (3218), 866 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 3218 transitions. [2022-11-16 11:16:06,548 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 3218 transitions. Word has length 9 [2022-11-16 11:16:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:06,549 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 3218 transitions. [2022-11-16 11:16:06,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:06,549 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 3218 transitions. [2022-11-16 11:16:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:06,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:06,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:06,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:06,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:06,762 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1902098152, now seen corresponding path program 1 times [2022-11-16 11:16:06,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:06,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181487953] [2022-11-16 11:16:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:06,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:06,766 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:06,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:16:06,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:07,165 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:07,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:07,324 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:07,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:07,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:07,485 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:07,486 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 13 treesize of output 13 [2022-11-16 11:16:07,630 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 11:16:07,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:10,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:10,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181487953] [2022-11-16 11:16:10,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181487953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:10,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:10,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:16:10,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894068766] [2022-11-16 11:16:10,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:16:10,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:10,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:16:10,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:16:10,209 INFO L87 Difference]: Start difference. First operand 867 states and 3218 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:11,212 INFO L93 Difference]: Finished difference Result 997 states and 3556 transitions. [2022-11-16 11:16:11,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:16:11,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:11,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:11,223 INFO L225 Difference]: With dead ends: 997 [2022-11-16 11:16:11,223 INFO L226 Difference]: Without dead ends: 997 [2022-11-16 11:16:11,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:16:11,225 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:11,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 171 Invalid, 0 Unknown, 124 Unchecked, 0.9s Time] [2022-11-16 11:16:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-16 11:16:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 868. [2022-11-16 11:16:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 749 states have (on average 4.3004005340453935) internal successors, (3221), 867 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3221 transitions. [2022-11-16 11:16:11,256 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3221 transitions. Word has length 9 [2022-11-16 11:16:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:11,257 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 3221 transitions. [2022-11-16 11:16:11,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:11,257 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3221 transitions. [2022-11-16 11:16:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:11,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:11,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:11,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:11,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:11,472 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1902319492, now seen corresponding path program 2 times [2022-11-16 11:16:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916536231] [2022-11-16 11:16:11,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:16:11,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:11,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:11,474 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:11,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:11,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:16:11,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:11,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:16:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:11,776 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:11,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:11,922 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:11,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:12,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:12,023 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:12,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:16:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:12,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:12,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:12,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916536231] [2022-11-16 11:16:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916536231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:12,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:12,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:16:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935135010] [2022-11-16 11:16:12,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:12,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:16:12,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:12,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:16:12,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:16:12,166 INFO L87 Difference]: Start difference. First operand 868 states and 3221 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:12,575 INFO L93 Difference]: Finished difference Result 869 states and 3222 transitions. [2022-11-16 11:16:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:12,578 INFO L225 Difference]: With dead ends: 869 [2022-11-16 11:16:12,578 INFO L226 Difference]: Without dead ends: 869 [2022-11-16 11:16:12,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:12,579 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:12,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-16 11:16:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-16 11:16:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 868. [2022-11-16 11:16:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 749 states have (on average 4.297730307076101) internal successors, (3219), 867 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3219 transitions. [2022-11-16 11:16:12,601 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3219 transitions. Word has length 9 [2022-11-16 11:16:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:12,602 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 3219 transitions. [2022-11-16 11:16:12,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3219 transitions. [2022-11-16 11:16:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:12,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:12,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:12,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:12,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:12,815 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1902320307, now seen corresponding path program 1 times [2022-11-16 11:16:12,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:12,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465254616] [2022-11-16 11:16:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:12,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:12,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:12,818 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:12,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:12,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:16:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:13,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:13,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:13,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465254616] [2022-11-16 11:16:13,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465254616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:13,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:13,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:16:13,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692635700] [2022-11-16 11:16:13,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:13,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:16:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:13,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:16:13,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:13,008 INFO L87 Difference]: Start difference. First operand 868 states and 3219 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:13,515 INFO L93 Difference]: Finished difference Result 985 states and 3402 transitions. [2022-11-16 11:16:13,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:16:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:13,518 INFO L225 Difference]: With dead ends: 985 [2022-11-16 11:16:13,519 INFO L226 Difference]: Without dead ends: 985 [2022-11-16 11:16:13,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:13,519 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:13,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 7 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:16:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-11-16 11:16:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 868. [2022-11-16 11:16:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 749 states have (on average 4.133511348464619) internal successors, (3096), 867 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3096 transitions. [2022-11-16 11:16:13,548 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3096 transitions. Word has length 9 [2022-11-16 11:16:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:13,549 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 3096 transitions. [2022-11-16 11:16:13,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3096 transitions. [2022-11-16 11:16:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:13,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:13,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:13,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:13,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:13,762 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:13,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1902320391, now seen corresponding path program 1 times [2022-11-16 11:16:13,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058545584] [2022-11-16 11:16:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:13,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:13,765 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:13,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:16:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:14,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:14,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058545584] [2022-11-16 11:16:14,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058545584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:14,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:14,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:16:14,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753642433] [2022-11-16 11:16:14,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:14,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:16:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:16:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:16:14,228 INFO L87 Difference]: Start difference. First operand 868 states and 3096 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:16,269 INFO L93 Difference]: Finished difference Result 1589 states and 5474 transitions. [2022-11-16 11:16:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:16:16,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:16,274 INFO L225 Difference]: With dead ends: 1589 [2022-11-16 11:16:16,274 INFO L226 Difference]: Without dead ends: 1589 [2022-11-16 11:16:16,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:16:16,275 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 320 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:16,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 31 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:16:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-11-16 11:16:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1236. [2022-11-16 11:16:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1117 states have (on average 4.052820053715309) internal successors, (4527), 1235 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4527 transitions. [2022-11-16 11:16:16,333 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4527 transitions. Word has length 9 [2022-11-16 11:16:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:16,334 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 4527 transitions. [2022-11-16 11:16:16,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4527 transitions. [2022-11-16 11:16:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:16,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:16,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:16,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:16,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:16,550 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1902320276, now seen corresponding path program 1 times [2022-11-16 11:16:16,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:16,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687184043] [2022-11-16 11:16:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:16,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:16,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:16,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:16,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:16,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:16:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:16,868 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:16:16,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-16 11:16:17,104 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-16 11:16:17,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-16 11:16:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:17,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:17,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:17,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687184043] [2022-11-16 11:16:17,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687184043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:17,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:17,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:16:17,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387341222] [2022-11-16 11:16:17,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:17,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:16:17,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:16:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:17,515 INFO L87 Difference]: Start difference. First operand 1236 states and 4527 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:17,695 INFO L93 Difference]: Finished difference Result 1233 states and 4519 transitions. [2022-11-16 11:16:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:16:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:17,699 INFO L225 Difference]: With dead ends: 1233 [2022-11-16 11:16:17,699 INFO L226 Difference]: Without dead ends: 1233 [2022-11-16 11:16:17,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:17,700 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:17,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-11-16 11:16:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-11-16 11:16:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2022-11-16 11:16:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1115 states have (on average 4.052914798206278) internal successors, (4519), 1232 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4519 transitions. [2022-11-16 11:16:17,728 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4519 transitions. Word has length 9 [2022-11-16 11:16:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:17,729 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 4519 transitions. [2022-11-16 11:16:17,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4519 transitions. [2022-11-16 11:16:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:17,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:17,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:17,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:16:17,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:17,943 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1902320275, now seen corresponding path program 1 times [2022-11-16 11:16:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:17,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588189527] [2022-11-16 11:16:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:17,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:17,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:17,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:17,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:18,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:16:18,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:18,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:18,358 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-16 11:16:18,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-16 11:16:18,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 11:16:18,562 INFO L321 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-11-16 11:16:18,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 30 [2022-11-16 11:16:18,784 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 11:16:18,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:19,203 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 11:16:19,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:19,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588189527] [2022-11-16 11:16:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588189527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:19,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:19,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:16:19,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548518407] [2022-11-16 11:16:19,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:19,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:16:19,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:16:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:19,206 INFO L87 Difference]: Start difference. First operand 1233 states and 4519 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:20,111 INFO L93 Difference]: Finished difference Result 1243 states and 4536 transitions. [2022-11-16 11:16:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:16:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:20,116 INFO L225 Difference]: With dead ends: 1243 [2022-11-16 11:16:20,116 INFO L226 Difference]: Without dead ends: 1243 [2022-11-16 11:16:20,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:16:20,117 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:20,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 122 Unchecked, 0.6s Time] [2022-11-16 11:16:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-11-16 11:16:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1237. [2022-11-16 11:16:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1119 states have (on average 4.047363717605005) internal successors, (4529), 1236 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4529 transitions. [2022-11-16 11:16:20,148 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4529 transitions. Word has length 9 [2022-11-16 11:16:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:20,148 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 4529 transitions. [2022-11-16 11:16:20,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4529 transitions. [2022-11-16 11:16:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:16:20,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:20,149 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:20,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:20,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:20,362 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:20,363 INFO L85 PathProgramCache]: Analyzing trace with hash -741473186, now seen corresponding path program 2 times [2022-11-16 11:16:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:20,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171145259] [2022-11-16 11:16:20,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:16:20,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:20,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:20,365 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:20,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:20,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:16:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:16:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:20,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:20,638 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:16:20,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:16:20,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 11:16:20,795 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:16:20,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:16:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:16:21,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:21,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:21,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171145259] [2022-11-16 11:16:21,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171145259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:21,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:21,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:16:21,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265275914] [2022-11-16 11:16:21,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:21,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:16:21,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:16:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:21,013 INFO L87 Difference]: Start difference. First operand 1237 states and 4529 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:21,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:21,179 INFO L93 Difference]: Finished difference Result 1233 states and 4519 transitions. [2022-11-16 11:16:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:16:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:16:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:21,183 INFO L225 Difference]: With dead ends: 1233 [2022-11-16 11:16:21,183 INFO L226 Difference]: Without dead ends: 1233 [2022-11-16 11:16:21,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:21,184 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:21,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-11-16 11:16:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-11-16 11:16:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2022-11-16 11:16:21,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1115 states have (on average 4.052914798206278) internal successors, (4519), 1232 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4519 transitions. [2022-11-16 11:16:21,209 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4519 transitions. Word has length 9 [2022-11-16 11:16:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:21,210 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 4519 transitions. [2022-11-16 11:16:21,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4519 transitions. [2022-11-16 11:16:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:16:21,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:21,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:21,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:21,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:21,422 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:21,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1164542233, now seen corresponding path program 1 times [2022-11-16 11:16:21,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:21,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945794912] [2022-11-16 11:16:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:21,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:21,425 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:21,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:16:21,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:21,761 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 11:16:21,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:21,977 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 11:16:21,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:21,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945794912] [2022-11-16 11:16:21,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945794912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:21,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:21,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:16:21,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187176499] [2022-11-16 11:16:21,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:21,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:16:21,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:16:21,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:16:21,979 INFO L87 Difference]: Start difference. First operand 1233 states and 4519 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 11:16:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:23,222 INFO L93 Difference]: Finished difference Result 1662 states and 5790 transitions. [2022-11-16 11:16:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:16:23,223 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 11:16:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:23,227 INFO L225 Difference]: With dead ends: 1662 [2022-11-16 11:16:23,227 INFO L226 Difference]: Without dead ends: 1662 [2022-11-16 11:16:23,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:16:23,228 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 180 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:23,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 25 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 347 Invalid, 0 Unknown, 111 Unchecked, 1.2s Time] [2022-11-16 11:16:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-11-16 11:16:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1508. [2022-11-16 11:16:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1390 states have (on average 3.9107913669064747) internal successors, (5436), 1507 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5436 transitions. [2022-11-16 11:16:23,261 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5436 transitions. Word has length 10 [2022-11-16 11:16:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:23,262 INFO L495 AbstractCegarLoop]: Abstraction has 1508 states and 5436 transitions. [2022-11-16 11:16:23,262 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 11:16:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5436 transitions. [2022-11-16 11:16:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:16:23,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:23,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:23,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:23,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:23,475 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:23,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1164541784, now seen corresponding path program 1 times [2022-11-16 11:16:23,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:23,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84448138] [2022-11-16 11:16:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:23,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:23,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:23,477 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:23,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:16:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:23,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:23,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:23,963 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:23,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:24,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:24,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:24,114 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:24,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:16:24,254 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 11:16:24,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:28,790 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 11:16:28,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84448138] [2022-11-16 11:16:28,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84448138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:28,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:28,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:16:28,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149922313] [2022-11-16 11:16:28,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:28,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:16:28,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:16:28,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:16:28,793 INFO L87 Difference]: Start difference. First operand 1508 states and 5436 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 11:16:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:29,914 INFO L93 Difference]: Finished difference Result 1670 states and 5904 transitions. [2022-11-16 11:16:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:16:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 11:16:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:29,919 INFO L225 Difference]: With dead ends: 1670 [2022-11-16 11:16:29,919 INFO L226 Difference]: Without dead ends: 1670 [2022-11-16 11:16:29,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:16:29,920 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:29,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 108 Unchecked, 1.0s Time] [2022-11-16 11:16:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-11-16 11:16:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1538. [2022-11-16 11:16:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1420 states have (on average 3.9014084507042255) internal successors, (5540), 1537 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5540 transitions. [2022-11-16 11:16:29,980 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5540 transitions. Word has length 10 [2022-11-16 11:16:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:29,981 INFO L495 AbstractCegarLoop]: Abstraction has 1538 states and 5540 transitions. [2022-11-16 11:16:29,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 11:16:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5540 transitions. [2022-11-16 11:16:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:16:29,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:29,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:29,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:30,194 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:30,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1164498074, now seen corresponding path program 2 times [2022-11-16 11:16:30,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:30,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144235153] [2022-11-16 11:16:30,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:16:30,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:30,196 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:30,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:30,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:16:30,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:30,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:16:30,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:30,474 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:30,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:30,616 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:30,616 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:30,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:30,710 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:30,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:16:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:30,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:30,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144235153] [2022-11-16 11:16:30,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144235153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:30,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:30,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:16:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796481803] [2022-11-16 11:16:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:30,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:16:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:16:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:16:30,861 INFO L87 Difference]: Start difference. First operand 1538 states and 5540 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:16:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:31,276 INFO L93 Difference]: Finished difference Result 1551 states and 5590 transitions. [2022-11-16 11:16:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:16:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:31,282 INFO L225 Difference]: With dead ends: 1551 [2022-11-16 11:16:31,283 INFO L226 Difference]: Without dead ends: 1551 [2022-11-16 11:16:31,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:31,284 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:31,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-11-16 11:16:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2022-11-16 11:16:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1549. [2022-11-16 11:16:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1431 states have (on average 3.902166317260657) internal successors, (5584), 1548 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5584 transitions. [2022-11-16 11:16:31,315 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5584 transitions. Word has length 10 [2022-11-16 11:16:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:31,315 INFO L495 AbstractCegarLoop]: Abstraction has 1549 states and 5584 transitions. [2022-11-16 11:16:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:16:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5584 transitions. [2022-11-16 11:16:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:16:31,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:31,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:31,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:31,516 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1157636534, now seen corresponding path program 3 times [2022-11-16 11:16:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:31,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437682114] [2022-11-16 11:16:31,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:16:31,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:31,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:31,518 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:31,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:31,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:16:31,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:31,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:16:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:31,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:31,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:31,957 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:31,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:32,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:32,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:32,056 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:32,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:16:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:32,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:32,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437682114] [2022-11-16 11:16:32,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437682114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:32,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:32,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:16:32,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949166464] [2022-11-16 11:16:32,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:32,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:16:32,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:16:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:16:32,246 INFO L87 Difference]: Start difference. First operand 1549 states and 5584 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:16:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:32,724 INFO L93 Difference]: Finished difference Result 1817 states and 6566 transitions. [2022-11-16 11:16:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:16:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:32,730 INFO L225 Difference]: With dead ends: 1817 [2022-11-16 11:16:32,730 INFO L226 Difference]: Without dead ends: 1817 [2022-11-16 11:16:32,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:32,730 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:32,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 20 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-11-16 11:16:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-16 11:16:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1813. [2022-11-16 11:16:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1695 states have (on average 3.871386430678466) internal successors, (6562), 1812 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 6562 transitions. [2022-11-16 11:16:32,761 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 6562 transitions. Word has length 10 [2022-11-16 11:16:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:32,762 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 6562 transitions. [2022-11-16 11:16:32,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:16:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 6562 transitions. [2022-11-16 11:16:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:16:32,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:32,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:32,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:16:32,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:32,963 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1157613771, now seen corresponding path program 1 times [2022-11-16 11:16:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:32,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796895087] [2022-11-16 11:16:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:32,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:32,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:32,965 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:32,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:16:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:33,292 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 11:16:33,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-16 11:16:33,559 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-16 11:16:33,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-16 11:16:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:33,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:33,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:33,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796895087] [2022-11-16 11:16:33,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796895087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:33,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:33,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:16:33,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014348076] [2022-11-16 11:16:33,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:33,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:16:33,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:33,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:16:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:33,933 INFO L87 Difference]: Start difference. First operand 1813 states and 6562 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:34,143 INFO L93 Difference]: Finished difference Result 1812 states and 6560 transitions. [2022-11-16 11:16:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:16:34,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:16:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:34,148 INFO L225 Difference]: With dead ends: 1812 [2022-11-16 11:16:34,149 INFO L226 Difference]: Without dead ends: 1812 [2022-11-16 11:16:34,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:34,149 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:34,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-11-16 11:16:34,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-16 11:16:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1812. [2022-11-16 11:16:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1695 states have (on average 3.870206489675516) internal successors, (6560), 1811 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6560 transitions. [2022-11-16 11:16:34,192 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6560 transitions. Word has length 10 [2022-11-16 11:16:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:34,193 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 6560 transitions. [2022-11-16 11:16:34,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6560 transitions. [2022-11-16 11:16:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:16:34,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:34,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:34,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:16:34,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:34,395 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:34,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1157613772, now seen corresponding path program 1 times [2022-11-16 11:16:34,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:34,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286695983] [2022-11-16 11:16:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:34,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:34,397 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:34,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:16:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:34,784 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:16:34,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:16:34,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 11:16:34,996 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-16 11:16:34,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 42 [2022-11-16 11:16:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:35,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:36,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:36,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286695983] [2022-11-16 11:16:36,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286695983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:36,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:36,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:16:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022475306] [2022-11-16 11:16:36,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:36,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:16:36,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:36,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:16:36,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:16:36,148 INFO L87 Difference]: Start difference. First operand 1812 states and 6560 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11:16:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:37,369 INFO L93 Difference]: Finished difference Result 1937 states and 6892 transitions. [2022-11-16 11:16:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:16:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11:16:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:37,375 INFO L225 Difference]: With dead ends: 1937 [2022-11-16 11:16:37,375 INFO L226 Difference]: Without dead ends: 1937 [2022-11-16 11:16:37,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:16:37,376 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:37,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 211 Invalid, 0 Unknown, 215 Unchecked, 1.1s Time] [2022-11-16 11:16:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-11-16 11:16:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1815. [2022-11-16 11:16:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1698 states have (on average 3.8733804475853946) internal successors, (6577), 1814 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 6577 transitions. [2022-11-16 11:16:37,433 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 6577 transitions. Word has length 10 [2022-11-16 11:16:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:37,434 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 6577 transitions. [2022-11-16 11:16:37,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11:16:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 6577 transitions. [2022-11-16 11:16:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:37,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:37,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:37,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:37,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:37,635 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1741074068, now seen corresponding path program 1 times [2022-11-16 11:16:37,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:37,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210347265] [2022-11-16 11:16:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:37,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:37,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:37,637 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:37,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:16:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:37,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:37,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:37,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:37,967 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:16:37,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-16 11:16:37,988 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 11:16:38,142 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-16 11:16:38,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 11:16:38,443 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 11:16:38,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:38,811 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 11:16:38,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:38,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210347265] [2022-11-16 11:16:38,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210347265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:38,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:38,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:16:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399740077] [2022-11-16 11:16:38,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:38,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:16:38,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:16:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:38,813 INFO L87 Difference]: Start difference. First operand 1815 states and 6577 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:38,997 INFO L93 Difference]: Finished difference Result 1824 states and 6598 transitions. [2022-11-16 11:16:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:38,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:16:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:39,004 INFO L225 Difference]: With dead ends: 1824 [2022-11-16 11:16:39,005 INFO L226 Difference]: Without dead ends: 1824 [2022-11-16 11:16:39,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:39,006 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:39,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2022-11-16 11:16:39,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-11-16 11:16:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1821. [2022-11-16 11:16:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1704 states have (on average 3.867957746478873) internal successors, (6591), 1820 states have internal predecessors, (6591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 6591 transitions. [2022-11-16 11:16:39,098 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 6591 transitions. Word has length 11 [2022-11-16 11:16:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:39,099 INFO L495 AbstractCegarLoop]: Abstraction has 1821 states and 6591 transitions. [2022-11-16 11:16:39,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 6591 transitions. [2022-11-16 11:16:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:39,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:39,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:39,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:39,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:39,312 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:39,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1741060707, now seen corresponding path program 1 times [2022-11-16 11:16:39,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:39,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930106794] [2022-11-16 11:16:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:39,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:39,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:39,314 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:39,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:16:39,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:39,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:39,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:39,667 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:16:39,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-16 11:16:39,688 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 11:16:39,841 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-16 11:16:39,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 11:16:40,115 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 11:16:40,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:40,517 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 11:16:40,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:40,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930106794] [2022-11-16 11:16:40,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930106794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:40,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:40,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:16:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516855504] [2022-11-16 11:16:40,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:40,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:16:40,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:16:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:40,519 INFO L87 Difference]: Start difference. First operand 1821 states and 6591 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:40,934 INFO L93 Difference]: Finished difference Result 1847 states and 6663 transitions. [2022-11-16 11:16:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:16:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:40,940 INFO L225 Difference]: With dead ends: 1847 [2022-11-16 11:16:40,940 INFO L226 Difference]: Without dead ends: 1847 [2022-11-16 11:16:40,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:40,941 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:40,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2022-11-16 11:16:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-11-16 11:16:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1845. [2022-11-16 11:16:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1728 states have (on average 3.8559027777777777) internal successors, (6663), 1844 states have internal predecessors, (6663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 6663 transitions. [2022-11-16 11:16:40,978 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 6663 transitions. Word has length 11 [2022-11-16 11:16:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:40,978 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 6663 transitions. [2022-11-16 11:16:40,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 6663 transitions. [2022-11-16 11:16:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:40,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:40,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:40,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-16 11:16:41,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:41,182 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:41,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1741061251, now seen corresponding path program 1 times [2022-11-16 11:16:41,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:41,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37656176] [2022-11-16 11:16:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:41,183 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:41,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:41,184 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:41,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:41,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:16:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:41,563 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:41,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:41,702 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:41,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:41,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:41,922 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:41,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:16:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:42,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:44,668 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 11:16:44,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:44,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37656176] [2022-11-16 11:16:44,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37656176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:44,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:44,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:16:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381458994] [2022-11-16 11:16:44,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:44,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:16:44,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:16:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:16:44,670 INFO L87 Difference]: Start difference. First operand 1845 states and 6663 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:45,438 INFO L93 Difference]: Finished difference Result 2184 states and 7827 transitions. [2022-11-16 11:16:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:16:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:16:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:45,446 INFO L225 Difference]: With dead ends: 2184 [2022-11-16 11:16:45,446 INFO L226 Difference]: Without dead ends: 2184 [2022-11-16 11:16:45,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:16:45,447 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:45,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 206 Unchecked, 0.6s Time] [2022-11-16 11:16:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2022-11-16 11:16:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1975. [2022-11-16 11:16:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1858 states have (on average 3.9155005382131325) internal successors, (7275), 1974 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 7275 transitions. [2022-11-16 11:16:45,501 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 7275 transitions. Word has length 11 [2022-11-16 11:16:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:45,534 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 7275 transitions. [2022-11-16 11:16:45,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 7275 transitions. [2022-11-16 11:16:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:45,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:45,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:45,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:45,736 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1741276586, now seen corresponding path program 1 times [2022-11-16 11:16:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:45,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181389961] [2022-11-16 11:16:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:45,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:45,739 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:45,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:16:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:45,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:45,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181389961] [2022-11-16 11:16:45,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181389961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:45,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:45,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:16:45,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102002982] [2022-11-16 11:16:45,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:45,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:16:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:16:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:16:45,934 INFO L87 Difference]: Start difference. First operand 1975 states and 7275 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:46,226 INFO L93 Difference]: Finished difference Result 1610 states and 5745 transitions. [2022-11-16 11:16:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:16:46,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:16:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:46,233 INFO L225 Difference]: With dead ends: 1610 [2022-11-16 11:16:46,233 INFO L226 Difference]: Without dead ends: 1610 [2022-11-16 11:16:46,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:16:46,235 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:46,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:16:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2022-11-16 11:16:46,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2022-11-16 11:16:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1520 states have (on average 3.7796052631578947) internal successors, (5745), 1609 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5745 transitions. [2022-11-16 11:16:46,278 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5745 transitions. Word has length 11 [2022-11-16 11:16:46,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:46,278 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 5745 transitions. [2022-11-16 11:16:46,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5745 transitions. [2022-11-16 11:16:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:46,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:46,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:46,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-16 11:16:46,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:46,481 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1741276588, now seen corresponding path program 1 times [2022-11-16 11:16:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783279017] [2022-11-16 11:16:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:46,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:46,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:46,482 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:46,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:16:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:46,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:46,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:46,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783279017] [2022-11-16 11:16:46,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783279017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:46,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:46,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:16:46,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398154999] [2022-11-16 11:16:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:46,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:16:46,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:16:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:16:46,702 INFO L87 Difference]: Start difference. First operand 1610 states and 5745 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:47,008 INFO L93 Difference]: Finished difference Result 1245 states and 4215 transitions. [2022-11-16 11:16:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:16:47,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:16:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:47,012 INFO L225 Difference]: With dead ends: 1245 [2022-11-16 11:16:47,012 INFO L226 Difference]: Without dead ends: 1245 [2022-11-16 11:16:47,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 11:16:47,013 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:47,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:16:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-11-16 11:16:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1245. [2022-11-16 11:16:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1182 states have (on average 3.565989847715736) internal successors, (4215), 1244 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4215 transitions. [2022-11-16 11:16:47,046 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4215 transitions. Word has length 11 [2022-11-16 11:16:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:47,047 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 4215 transitions. [2022-11-16 11:16:47,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4215 transitions. [2022-11-16 11:16:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:47,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:47,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:47,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:47,262 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1741275151, now seen corresponding path program 2 times [2022-11-16 11:16:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711715034] [2022-11-16 11:16:47,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:16:47,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:47,264 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:47,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:47,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:16:47,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:47,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:16:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:47,637 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:47,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:47,788 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:47,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:47,869 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:47,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:16:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:48,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:48,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:48,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711715034] [2022-11-16 11:16:48,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711715034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:48,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:48,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:16:48,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035016777] [2022-11-16 11:16:48,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:48,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:16:48,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:16:48,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:16:48,032 INFO L87 Difference]: Start difference. First operand 1245 states and 4215 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11:16:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:48,337 INFO L93 Difference]: Finished difference Result 1265 states and 4329 transitions. [2022-11-16 11:16:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11:16:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:48,340 INFO L225 Difference]: With dead ends: 1265 [2022-11-16 11:16:48,340 INFO L226 Difference]: Without dead ends: 1265 [2022-11-16 11:16:48,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:48,341 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:48,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 16 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 11:16:48,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-11-16 11:16:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1253. [2022-11-16 11:16:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1190 states have (on average 3.5756302521008405) internal successors, (4255), 1252 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4255 transitions. [2022-11-16 11:16:48,370 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4255 transitions. Word has length 11 [2022-11-16 11:16:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:48,370 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 4255 transitions. [2022-11-16 11:16:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11:16:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4255 transitions. [2022-11-16 11:16:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:48,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:48,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:48,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:48,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:48,583 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1739706241, now seen corresponding path program 3 times [2022-11-16 11:16:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891594083] [2022-11-16 11:16:48,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:16:48,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:48,585 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:48,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:48,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:16:48,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:16:48,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:48,889 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:16:48,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:16:49,046 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:16:49,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:16:49,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:49,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:16:49,142 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:49,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:16:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:16:49,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:49,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:49,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891594083] [2022-11-16 11:16:49,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891594083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:49,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:49,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:16:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718422649] [2022-11-16 11:16:49,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:49,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:16:49,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:16:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:16:49,306 INFO L87 Difference]: Start difference. First operand 1253 states and 4255 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11:16:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:49,734 INFO L93 Difference]: Finished difference Result 1405 states and 4771 transitions. [2022-11-16 11:16:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:16:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11:16:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:49,739 INFO L225 Difference]: With dead ends: 1405 [2022-11-16 11:16:49,739 INFO L226 Difference]: Without dead ends: 1405 [2022-11-16 11:16:49,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:49,740 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:49,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 18 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-16 11:16:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2022-11-16 11:16:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1232. [2022-11-16 11:16:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1169 states have (on average 3.5782720273738238) internal successors, (4183), 1231 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4183 transitions. [2022-11-16 11:16:49,764 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4183 transitions. Word has length 11 [2022-11-16 11:16:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:49,764 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 4183 transitions. [2022-11-16 11:16:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 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 11:16:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4183 transitions. [2022-11-16 11:16:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:16:49,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:49,765 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1] [2022-11-16 11:16:49,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:49,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:49,966 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:16:49,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash 289962406, now seen corresponding path program 1 times [2022-11-16 11:16:49,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:49,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992114053] [2022-11-16 11:16:49,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:49,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:49,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:49,968 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:16:49,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:16:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:50,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:16:50,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:50,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:16:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:16:50,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:51,908 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:51,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992114053] [2022-11-16 11:16:51,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992114053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:51,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:51,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2022-11-16 11:16:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522585041] [2022-11-16 11:16:51,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:51,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:16:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:16:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:16:51,910 INFO L87 Difference]: Start difference. First operand 1232 states and 4183 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:08,301 INFO L93 Difference]: Finished difference Result 6538 states and 21620 transitions. [2022-11-16 11:17:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:17:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:17:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:08,320 INFO L225 Difference]: With dead ends: 6538 [2022-11-16 11:17:08,321 INFO L226 Difference]: Without dead ends: 6538 [2022-11-16 11:17:08,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:17:08,321 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 971 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:08,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 204 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2117 Invalid, 0 Unknown, 361 Unchecked, 14.1s Time] [2022-11-16 11:17:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2022-11-16 11:17:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 1231. [2022-11-16 11:17:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1168 states have (on average 3.577054794520548) internal successors, (4178), 1230 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 4178 transitions. [2022-11-16 11:17:08,396 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 4178 transitions. Word has length 11 [2022-11-16 11:17:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:08,396 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 4178 transitions. [2022-11-16 11:17:08,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 4178 transitions. [2022-11-16 11:17:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:17:08,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:08,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:08,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:08,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:08,611 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash 320895134, now seen corresponding path program 2 times [2022-11-16 11:17:08,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:08,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933946374] [2022-11-16 11:17:08,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:17:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:08,613 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:08,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:08,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:17:08,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:17:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:08,993 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:17:08,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 11:17:09,123 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:17:09,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:17:09,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:09,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:17:09,226 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:17:09,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:17:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:17:09,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:17:14,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:14,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933946374] [2022-11-16 11:17:14,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933946374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:14,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:14,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:17:14,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365036552] [2022-11-16 11:17:14,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:14,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:17:14,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:17:14,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2022-11-16 11:17:14,273 INFO L87 Difference]: Start difference. First operand 1231 states and 4178 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11:17:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:16,630 INFO L93 Difference]: Finished difference Result 1672 states and 5322 transitions. [2022-11-16 11:17:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:17:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11 [2022-11-16 11:17:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:16,635 INFO L225 Difference]: With dead ends: 1672 [2022-11-16 11:17:16,635 INFO L226 Difference]: Without dead ends: 1672 [2022-11-16 11:17:16,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=48, Invalid=161, Unknown=1, NotChecked=0, Total=210 [2022-11-16 11:17:16,636 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 132 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:16,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 72 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 571 Invalid, 0 Unknown, 80 Unchecked, 2.2s Time] [2022-11-16 11:17:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-11-16 11:17:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1127. [2022-11-16 11:17:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1064 states have (on average 3.5) internal successors, (3724), 1126 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3724 transitions. [2022-11-16 11:17:16,655 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3724 transitions. Word has length 11 [2022-11-16 11:17:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:16,656 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 3724 transitions. [2022-11-16 11:17:16,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 11:17:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3724 transitions. [2022-11-16 11:17:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:17:16,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:16,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:16,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-16 11:17:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:16,857 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash 320895136, now seen corresponding path program 1 times [2022-11-16 11:17:16,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:16,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811897486] [2022-11-16 11:17:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:16,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:16,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:16,859 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:16,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:17:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:17:17,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:17,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-16 11:17:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:17:17,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:17,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811897486] [2022-11-16 11:17:17,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811897486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:17,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:17,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 11:17:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491285924] [2022-11-16 11:17:17,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:17:17,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:17,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:17:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:17:17,743 INFO L87 Difference]: Start difference. First operand 1127 states and 3724 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:22,439 INFO L93 Difference]: Finished difference Result 3066 states and 9597 transitions. [2022-11-16 11:17:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:17:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:17:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:22,448 INFO L225 Difference]: With dead ends: 3066 [2022-11-16 11:17:22,448 INFO L226 Difference]: Without dead ends: 3066 [2022-11-16 11:17:22,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:17:22,449 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 605 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:22,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 75 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-16 11:17:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2022-11-16 11:17:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1127. [2022-11-16 11:17:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1064 states have (on average 3.431390977443609) internal successors, (3651), 1126 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3651 transitions. [2022-11-16 11:17:22,484 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3651 transitions. Word has length 11 [2022-11-16 11:17:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:22,484 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 3651 transitions. [2022-11-16 11:17:22,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3651 transitions. [2022-11-16 11:17:22,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:17:22,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:22,486 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:22,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:22,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:22,701 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1255805642, now seen corresponding path program 2 times [2022-11-16 11:17:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:22,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725488226] [2022-11-16 11:17:22,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:17:22,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:22,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:22,703 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:22,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:22,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:17:22,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:22,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:17:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:23,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:17:23,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:17:23,184 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:17:23,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:17:23,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:23,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:17:23,296 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:17:23,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:17:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:17:23,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:17:23,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:23,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725488226] [2022-11-16 11:17:23,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725488226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:17:23,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:17:23,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:17:23,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078957874] [2022-11-16 11:17:23,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:17:23,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:17:23,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:17:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:17:23,440 INFO L87 Difference]: Start difference. First operand 1127 states and 3651 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:17:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:23,769 INFO L93 Difference]: Finished difference Result 1131 states and 3671 transitions. [2022-11-16 11:17:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:17:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11 [2022-11-16 11:17:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:23,772 INFO L225 Difference]: With dead ends: 1131 [2022-11-16 11:17:23,772 INFO L226 Difference]: Without dead ends: 1131 [2022-11-16 11:17:23,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:17:23,772 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:23,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-16 11:17:23,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-11-16 11:17:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1131. [2022-11-16 11:17:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1068 states have (on average 3.4372659176029963) internal successors, (3671), 1130 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3671 transitions. [2022-11-16 11:17:23,788 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3671 transitions. Word has length 11 [2022-11-16 11:17:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:23,789 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 3671 transitions. [2022-11-16 11:17:23,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 11:17:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3671 transitions. [2022-11-16 11:17:23,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:17:23,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:23,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:23,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:23,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:23,990 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1255805644, now seen corresponding path program 1 times [2022-11-16 11:17:23,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:23,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035386152] [2022-11-16 11:17:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:23,992 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:23,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:17:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:24,266 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 11:17:24,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:24,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 11:17:24,576 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 11:17:24,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:24,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035386152] [2022-11-16 11:17:24,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035386152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:24,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:24,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 11:17:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317360803] [2022-11-16 11:17:24,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:17:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:17:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:17:24,578 INFO L87 Difference]: Start difference. First operand 1131 states and 3671 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:26,099 INFO L93 Difference]: Finished difference Result 1913 states and 6049 transitions. [2022-11-16 11:17:26,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:17:26,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:17:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:26,104 INFO L225 Difference]: With dead ends: 1913 [2022-11-16 11:17:26,105 INFO L226 Difference]: Without dead ends: 1913 [2022-11-16 11:17:26,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:17:26,105 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 318 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:26,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 19 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:17:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-11-16 11:17:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1282. [2022-11-16 11:17:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1219 states have (on average 3.6743232157506154) internal successors, (4479), 1281 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4479 transitions. [2022-11-16 11:17:26,128 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4479 transitions. Word has length 11 [2022-11-16 11:17:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:26,128 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 4479 transitions. [2022-11-16 11:17:26,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4479 transitions. [2022-11-16 11:17:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:17:26,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:26,129 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:26,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:26,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:26,329 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash 408868116, now seen corresponding path program 2 times [2022-11-16 11:17:26,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:26,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945669843] [2022-11-16 11:17:26,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:17:26,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:26,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:26,331 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:26,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:26,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:17:26,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:26,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:17:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:26,643 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 11:17:26,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-16 11:17:26,662 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 599 treesize of output 583 [2022-11-16 11:17:26,780 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:17:26,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:17:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:17:26,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:17:26,969 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:26,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945669843] [2022-11-16 11:17:26,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945669843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:17:26,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:17:26,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:17:26,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423438055] [2022-11-16 11:17:26,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:17:26,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:17:26,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:26,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:17:26,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:17:26,970 INFO L87 Difference]: Start difference. First operand 1282 states and 4479 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:27,125 INFO L93 Difference]: Finished difference Result 1274 states and 4447 transitions. [2022-11-16 11:17:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:17:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:17:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:27,129 INFO L225 Difference]: With dead ends: 1274 [2022-11-16 11:17:27,129 INFO L226 Difference]: Without dead ends: 1274 [2022-11-16 11:17:27,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:17:27,130 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:27,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-11-16 11:17:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-11-16 11:17:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1274. [2022-11-16 11:17:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1211 states have (on average 3.6721717588769613) internal successors, (4447), 1273 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4447 transitions. [2022-11-16 11:17:27,150 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4447 transitions. Word has length 11 [2022-11-16 11:17:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:27,151 INFO L495 AbstractCegarLoop]: Abstraction has 1274 states and 4447 transitions. [2022-11-16 11:17:27,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4447 transitions. [2022-11-16 11:17:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:17:27,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:27,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:27,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:27,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:27,352 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1861284872, now seen corresponding path program 1 times [2022-11-16 11:17:27,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:27,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403508702] [2022-11-16 11:17:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:27,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:27,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:27,354 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:27,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:27,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:17:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:27,738 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:17:27,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:17:27,888 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:17:27,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:17:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:28,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:17:28,011 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:17:28,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:17:28,202 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 11:17:28,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:30,793 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 11:17:30,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403508702] [2022-11-16 11:17:30,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403508702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:30,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:30,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:17:30,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767146781] [2022-11-16 11:17:30,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:30,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:17:30,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:30,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:17:30,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:17:30,797 INFO L87 Difference]: Start difference. First operand 1274 states and 4447 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) 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 11:17:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:31,931 INFO L93 Difference]: Finished difference Result 1388 states and 4746 transitions. [2022-11-16 11:17:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:17:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) 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 11:17:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:31,935 INFO L225 Difference]: With dead ends: 1388 [2022-11-16 11:17:31,935 INFO L226 Difference]: Without dead ends: 1388 [2022-11-16 11:17:31,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:17:31,936 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:31,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 112 Unchecked, 1.0s Time] [2022-11-16 11:17:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-11-16 11:17:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1275. [2022-11-16 11:17:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1212 states have (on average 3.6707920792079207) internal successors, (4449), 1274 states have internal predecessors, (4449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4449 transitions. [2022-11-16 11:17:31,957 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4449 transitions. Word has length 12 [2022-11-16 11:17:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:31,958 INFO L495 AbstractCegarLoop]: Abstraction has 1275 states and 4449 transitions. [2022-11-16 11:17:31,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) 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 11:17:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4449 transitions. [2022-11-16 11:17:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:17:31,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:31,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:31,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:32,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:32,162 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1861476452, now seen corresponding path program 2 times [2022-11-16 11:17:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323637035] [2022-11-16 11:17:32,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:17:32,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:32,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:32,164 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:32,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:32,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:17:32,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:17:32,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:17:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:32,490 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:17:32,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:17:32,638 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:17:32,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:17:32,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:32,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:17:32,726 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:17:32,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:17:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:17:32,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:17:32,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323637035] [2022-11-16 11:17:32,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323637035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:17:32,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:17:32,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:17:32,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113096191] [2022-11-16 11:17:32,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:17:32,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:17:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:17:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:17:32,923 INFO L87 Difference]: Start difference. First operand 1275 states and 4449 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:33,365 INFO L93 Difference]: Finished difference Result 1294 states and 4498 transitions. [2022-11-16 11:17:33,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:17:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:17:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:33,368 INFO L225 Difference]: With dead ends: 1294 [2022-11-16 11:17:33,368 INFO L226 Difference]: Without dead ends: 1294 [2022-11-16 11:17:33,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:17:33,368 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:33,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-11-16 11:17:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-11-16 11:17:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1274. [2022-11-16 11:17:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1211 states have (on average 3.671345995045417) internal successors, (4446), 1273 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4446 transitions. [2022-11-16 11:17:33,388 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4446 transitions. Word has length 12 [2022-11-16 11:17:33,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:33,388 INFO L495 AbstractCegarLoop]: Abstraction has 1274 states and 4446 transitions. [2022-11-16 11:17:33,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4446 transitions. [2022-11-16 11:17:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:17:33,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:33,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:33,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-16 11:17:33,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:33,590 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1861692508, now seen corresponding path program 1 times [2022-11-16 11:17:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:33,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514983460] [2022-11-16 11:17:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:33,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:33,592 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:33,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:33,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:17:33,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:33,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:33,984 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2022-11-16 11:17:33,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 40 [2022-11-16 11:17:34,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2022-11-16 11:17:34,204 INFO L321 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2022-11-16 11:17:34,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-11-16 11:17:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:17:34,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:17:35,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:35,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514983460] [2022-11-16 11:17:35,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514983460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:35,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:35,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:17:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569419700] [2022-11-16 11:17:35,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:35,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:17:35,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:17:35,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:17:35,469 INFO L87 Difference]: Start difference. First operand 1274 states and 4446 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:17:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:36,680 INFO L93 Difference]: Finished difference Result 1550 states and 5221 transitions. [2022-11-16 11:17:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:17:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:17:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:36,684 INFO L225 Difference]: With dead ends: 1550 [2022-11-16 11:17:36,684 INFO L226 Difference]: Without dead ends: 1550 [2022-11-16 11:17:36,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:17:36,685 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:36,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 160 Invalid, 0 Unknown, 234 Unchecked, 1.1s Time] [2022-11-16 11:17:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-11-16 11:17:36,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1325. [2022-11-16 11:17:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1262 states have (on average 3.6759112519809825) internal successors, (4639), 1324 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4639 transitions. [2022-11-16 11:17:36,710 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4639 transitions. Word has length 12 [2022-11-16 11:17:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:36,711 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 4639 transitions. [2022-11-16 11:17:36,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:17:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4639 transitions. [2022-11-16 11:17:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:17:36,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:36,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:36,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:36,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:36,926 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:36,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1855003912, now seen corresponding path program 1 times [2022-11-16 11:17:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:36,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910699676] [2022-11-16 11:17:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:36,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:36,929 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:36,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:17:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:37,343 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:17:37,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:17:37,493 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:17:37,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:17:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:37,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:17:37,650 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:17:37,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:17:37,885 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 11:17:37,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:43,529 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 11:17:43,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:43,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910699676] [2022-11-16 11:17:43,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910699676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:43,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:43,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:17:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859378992] [2022-11-16 11:17:43,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:43,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:17:43,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:17:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:17:43,532 INFO L87 Difference]: Start difference. First operand 1325 states and 4639 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 11:17:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:45,021 INFO L93 Difference]: Finished difference Result 1393 states and 4985 transitions. [2022-11-16 11:17:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:17:45,022 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 11:17:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:45,025 INFO L225 Difference]: With dead ends: 1393 [2022-11-16 11:17:45,025 INFO L226 Difference]: Without dead ends: 1393 [2022-11-16 11:17:45,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:17:45,026 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:45,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 160 Unchecked, 0.8s Time] [2022-11-16 11:17:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-11-16 11:17:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2022-11-16 11:17:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1330 states have (on average 3.7481203007518795) internal successors, (4985), 1392 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4985 transitions. [2022-11-16 11:17:45,046 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4985 transitions. Word has length 12 [2022-11-16 11:17:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:45,047 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 4985 transitions. [2022-11-16 11:17:45,047 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 11:17:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4985 transitions. [2022-11-16 11:17:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:17:45,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:45,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:45,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:17:45,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:45,248 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1855003910, now seen corresponding path program 1 times [2022-11-16 11:17:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504957083] [2022-11-16 11:17:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:45,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:45,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:45,250 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:45,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:17:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:45,553 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:17:45,846 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 11:17:45,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:50,875 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 11:17:50,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:50,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504957083] [2022-11-16 11:17:50,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504957083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:50,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:50,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:17:50,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347174149] [2022-11-16 11:17:50,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:50,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:17:50,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:50,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:17:50,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=100, Unknown=2, NotChecked=0, Total=132 [2022-11-16 11:17:50,877 INFO L87 Difference]: Start difference. First operand 1393 states and 4985 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 11:17:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:56,123 INFO L93 Difference]: Finished difference Result 1393 states and 4957 transitions. [2022-11-16 11:17:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:17:56,124 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 11:17:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:56,128 INFO L225 Difference]: With dead ends: 1393 [2022-11-16 11:17:56,128 INFO L226 Difference]: Without dead ends: 1393 [2022-11-16 11:17:56,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=43, Invalid=135, Unknown=4, NotChecked=0, Total=182 [2022-11-16 11:17:56,129 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:56,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 26 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 106 Unchecked, 0.8s Time] [2022-11-16 11:17:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-11-16 11:17:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2022-11-16 11:17:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1330 states have (on average 3.7270676691729325) internal successors, (4957), 1392 states have internal predecessors, (4957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4957 transitions. [2022-11-16 11:17:56,155 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4957 transitions. Word has length 12 [2022-11-16 11:17:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:56,155 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 4957 transitions. [2022-11-16 11:17:56,155 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 11:17:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4957 transitions. [2022-11-16 11:17:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:17:56,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:56,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:56,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-16 11:17:56,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:56,366 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:17:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1855004737, now seen corresponding path program 1 times [2022-11-16 11:17:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897017303] [2022-11-16 11:17:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:56,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:56,368 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:17:56,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:17:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:17:56,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:56,933 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:17:56,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:17:57,162 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:17:57,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:17:57,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:57,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:17:57,375 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:17:57,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:17:57,626 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 11:17:57,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:00,423 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 11:18:00,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:18:00,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897017303] [2022-11-16 11:18:00,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897017303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:00,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:18:00,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:18:00,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986941224] [2022-11-16 11:18:00,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:00,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:18:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:18:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:18:00,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:18:00,425 INFO L87 Difference]: Start difference. First operand 1393 states and 4957 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) 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 11:18:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:01,308 INFO L93 Difference]: Finished difference Result 1514 states and 5344 transitions. [2022-11-16 11:18:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:18:01,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) 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 11:18:01,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:01,313 INFO L225 Difference]: With dead ends: 1514 [2022-11-16 11:18:01,313 INFO L226 Difference]: Without dead ends: 1514 [2022-11-16 11:18:01,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:18:01,313 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:01,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 78 Unchecked, 0.8s Time] [2022-11-16 11:18:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-11-16 11:18:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1397. [2022-11-16 11:18:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1334 states have (on average 3.729385307346327) internal successors, (4975), 1396 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4975 transitions. [2022-11-16 11:18:01,335 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4975 transitions. Word has length 12 [2022-11-16 11:18:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:01,336 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 4975 transitions. [2022-11-16 11:18:01,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) 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 11:18:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4975 transitions. [2022-11-16 11:18:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:18:01,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:01,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:01,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-16 11:18:01,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:01,537 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:18:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1855046587, now seen corresponding path program 2 times [2022-11-16 11:18:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:18:01,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298847104] [2022-11-16 11:18:01,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:18:01,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:01,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:18:01,539 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:18:01,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:01,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:18:01,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:01,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:18:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:01,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:18:01,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:18:02,185 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:18:02,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:18:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:02,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:18:02,352 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:18:02,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:18:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:18:02,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:18:02,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:18:02,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298847104] [2022-11-16 11:18:02,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298847104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:02,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:02,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:18:02,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983392468] [2022-11-16 11:18:02,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:02,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:18:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:18:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:18:02,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:18:02,644 INFO L87 Difference]: Start difference. First operand 1397 states and 4975 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:03,139 INFO L93 Difference]: Finished difference Result 1501 states and 5363 transitions. [2022-11-16 11:18:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:18:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:18:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:03,146 INFO L225 Difference]: With dead ends: 1501 [2022-11-16 11:18:03,146 INFO L226 Difference]: Without dead ends: 1501 [2022-11-16 11:18:03,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:18:03,147 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:03,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2022-11-16 11:18:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-16 11:18:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1389. [2022-11-16 11:18:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1326 states have (on average 3.726244343891403) internal successors, (4941), 1388 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4941 transitions. [2022-11-16 11:18:03,193 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4941 transitions. Word has length 12 [2022-11-16 11:18:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:03,193 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 4941 transitions. [2022-11-16 11:18:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4941 transitions. [2022-11-16 11:18:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:18:03,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:03,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:03,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:18:03,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:03,395 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:18:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1898877628, now seen corresponding path program 2 times [2022-11-16 11:18:03,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:18:03,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958139995] [2022-11-16 11:18:03,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:18:03,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:18:03,398 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:18:03,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:03,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:18:03,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:03,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:18:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:03,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:03,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:03,753 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:18:03,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:18:03,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:18:03,852 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:18:03,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:18:04,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:18:04,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:18:04,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:18:04,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958139995] [2022-11-16 11:18:04,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958139995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:04,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:04,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:18:04,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746378759] [2022-11-16 11:18:04,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:04,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:18:04,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:18:04,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:18:04,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:04,200 INFO L87 Difference]: Start difference. First operand 1389 states and 4941 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:04,439 INFO L93 Difference]: Finished difference Result 1379 states and 4895 transitions. [2022-11-16 11:18:04,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:18:04,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:18:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:04,443 INFO L225 Difference]: With dead ends: 1379 [2022-11-16 11:18:04,444 INFO L226 Difference]: Without dead ends: 1379 [2022-11-16 11:18:04,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:04,444 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:04,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-16 11:18:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-16 11:18:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1373. [2022-11-16 11:18:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1310 states have (on average 3.7259541984732825) internal successors, (4881), 1372 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4881 transitions. [2022-11-16 11:18:04,468 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4881 transitions. Word has length 12 [2022-11-16 11:18:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:04,469 INFO L495 AbstractCegarLoop]: Abstraction has 1373 states and 4881 transitions. [2022-11-16 11:18:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4881 transitions. [2022-11-16 11:18:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:18:04,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:04,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:04,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:04,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:04,682 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:18:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1357818226, now seen corresponding path program 3 times [2022-11-16 11:18:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:18:04,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372299654] [2022-11-16 11:18:04,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:18:04,683 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:04,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:18:04,684 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:18:04,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:04,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:18:04,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:04,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:18:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:05,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:18:05,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:18:05,467 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:18:05,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:18:05,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:18:05,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-16 11:18:05,783 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:18:05,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:18:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:18:06,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:18:08,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:18:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372299654] [2022-11-16 11:18:08,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372299654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:08,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:18:08,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:18:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074959022] [2022-11-16 11:18:08,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:08,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:18:08,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:18:08,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:18:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:18:08,008 INFO L87 Difference]: Start difference. First operand 1373 states and 4881 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 11:18:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:15,919 INFO L93 Difference]: Finished difference Result 2278 states and 8096 transitions. [2022-11-16 11:18:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:18:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 12 [2022-11-16 11:18:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:15,931 INFO L225 Difference]: With dead ends: 2278 [2022-11-16 11:18:15,931 INFO L226 Difference]: Without dead ends: 2272 [2022-11-16 11:18:15,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:18:15,932 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 284 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:15,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 97 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 159 Unchecked, 5.4s Time] [2022-11-16 11:18:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2022-11-16 11:18:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1689. [2022-11-16 11:18:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1615 states have (on average 4.017337461300309) internal successors, (6488), 1688 states have internal predecessors, (6488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 6488 transitions. [2022-11-16 11:18:15,976 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 6488 transitions. Word has length 12 [2022-11-16 11:18:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:15,977 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 6488 transitions. [2022-11-16 11:18:15,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 11:18:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 6488 transitions. [2022-11-16 11:18:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:18:15,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:15,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:15,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:16,193 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:18:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:16,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1357818228, now seen corresponding path program 2 times [2022-11-16 11:18:16,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:18:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520954883] [2022-11-16 11:18:16,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:18:16,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:16,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:18:16,195 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:18:16,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:16,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:18:16,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:18:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:16,624 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:18:16,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:18:16,862 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:18:16,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:18:17,010 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:18:17,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:18:17,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:18:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:18:17,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:18:17,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:18:17,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520954883] [2022-11-16 11:18:17,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520954883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:18:17,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:18:17,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:18:17,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373930896] [2022-11-16 11:18:17,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:18:17,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:18:17,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:18:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:18:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:18:17,336 INFO L87 Difference]: Start difference. First operand 1689 states and 6488 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:17,741 INFO L93 Difference]: Finished difference Result 1686 states and 6473 transitions. [2022-11-16 11:18:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:18:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:18:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:17,747 INFO L225 Difference]: With dead ends: 1686 [2022-11-16 11:18:17,747 INFO L226 Difference]: Without dead ends: 1686 [2022-11-16 11:18:17,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:18:17,748 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:17,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-11-16 11:18:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-11-16 11:18:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1686. [2022-11-16 11:18:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1613 states have (on average 4.013019218846869) internal successors, (6473), 1685 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 6473 transitions. [2022-11-16 11:18:17,783 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 6473 transitions. Word has length 12 [2022-11-16 11:18:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:17,783 INFO L495 AbstractCegarLoop]: Abstraction has 1686 states and 6473 transitions. [2022-11-16 11:18:17,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 6473 transitions. [2022-11-16 11:18:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:18:17,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:17,784 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:17,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:17,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:17,985 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:18:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash 275273165, now seen corresponding path program 1 times [2022-11-16 11:18:17,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:18:17,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496460649] [2022-11-16 11:18:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:17,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:18:17,987 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:18:17,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:18:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:18:18,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:18,445 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:18:18,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:18:18,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:18:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:18:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:18:19,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:18:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496460649] [2022-11-16 11:18:19,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496460649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:19,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:18:19,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 11:18:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159868074] [2022-11-16 11:18:19,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:19,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:18:19,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:18:19,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:18:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:18:19,176 INFO L87 Difference]: Start difference. First operand 1686 states and 6473 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:21,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:18:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:23,292 INFO L93 Difference]: Finished difference Result 3715 states and 14849 transitions. [2022-11-16 11:18:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:18:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:18:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:23,329 INFO L225 Difference]: With dead ends: 3715 [2022-11-16 11:18:23,329 INFO L226 Difference]: Without dead ends: 3715 [2022-11-16 11:18:23,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:18:23,330 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 263 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:23,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 36 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-16 11:18:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2022-11-16 11:18:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 1634. [2022-11-16 11:18:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1561 states have (on average 4.018577834721333) internal successors, (6273), 1633 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 6273 transitions. [2022-11-16 11:18:23,370 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 6273 transitions. Word has length 12 [2022-11-16 11:18:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:23,370 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 6273 transitions. [2022-11-16 11:18:23,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:18:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 6273 transitions. [2022-11-16 11:18:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:18:23,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:23,371 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 11:18:23,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:23,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:23,572 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:18:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash 60159505, now seen corresponding path program 3 times [2022-11-16 11:18:23,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:18:23,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338544809] [2022-11-16 11:18:23,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:18:23,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:18:23,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:18:23,574 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:18:23,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:18:23,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:18:23,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:23,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:18:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:24,074 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:18:24,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:18:24,887 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 11:18:24,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:28,761 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 11:18:28,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:18:28,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338544809] [2022-11-16 11:18:28,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338544809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:18:28,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:18:28,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-16 11:18:28,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234811000] [2022-11-16 11:18:28,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:28,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:18:28,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:18:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:18:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:18:28,764 INFO L87 Difference]: Start difference. First operand 1634 states and 6273 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 11:18:50,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:18:52,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:18:54,290 WARN L539 Checker$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 11:18:56,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:18:58,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:19:00,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:19:02,317 WARN L539 Checker$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 11:19:04,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:19:06,372 WARN L539 Checker$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 11:19:08,375 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 11:19:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:22,085 INFO L93 Difference]: Finished difference Result 11797 states and 48733 transitions. [2022-11-16 11:19:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:19:22,087 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 11:19:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:22,146 INFO L225 Difference]: With dead ends: 11797 [2022-11-16 11:19:22,146 INFO L226 Difference]: Without dead ends: 11797 [2022-11-16 11:19:22,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:19:22,147 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1513 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3991 mSolverCounterSat, 117 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 4118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3991 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:22,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 360 Invalid, 4118 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [117 Valid, 3991 Invalid, 10 Unknown, 0 Unchecked, 35.7s Time] [2022-11-16 11:19:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11797 states. [2022-11-16 11:19:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11797 to 1649. [2022-11-16 11:19:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1576 states have (on average 4.000634517766497) internal successors, (6305), 1648 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 6305 transitions. [2022-11-16 11:19:22,291 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 6305 transitions. Word has length 12 [2022-11-16 11:19:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:22,292 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 6305 transitions. [2022-11-16 11:19:22,292 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 11:19:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 6305 transitions. [2022-11-16 11:19:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:22,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:22,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:22,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-16 11:19:22,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:22,529 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1865252413, now seen corresponding path program 1 times [2022-11-16 11:19:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:22,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862459721] [2022-11-16 11:19:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:19:22,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:22,531 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:22,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:19:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:19:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:22,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:23,016 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:19:23,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-16 11:19:23,045 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 11:19:23,343 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-16 11:19:23,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-16 11:19:23,823 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 11:19:23,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:19:24,437 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 11:19:24,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:24,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862459721] [2022-11-16 11:19:24,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862459721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:19:24,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:19:24,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-16 11:19:24,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686399787] [2022-11-16 11:19:24,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:19:24,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:19:24,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:19:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:19:24,440 INFO L87 Difference]: Start difference. First operand 1649 states and 6305 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:24,873 INFO L93 Difference]: Finished difference Result 1658 states and 6332 transitions. [2022-11-16 11:19:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:19:24,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:19:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:24,881 INFO L225 Difference]: With dead ends: 1658 [2022-11-16 11:19:24,882 INFO L226 Difference]: Without dead ends: 1658 [2022-11-16 11:19:24,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:19:24,883 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:24,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2022-11-16 11:19:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-11-16 11:19:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1656. [2022-11-16 11:19:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1583 states have (on average 3.9974731522425775) internal successors, (6328), 1655 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6328 transitions. [2022-11-16 11:19:24,936 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6328 transitions. Word has length 13 [2022-11-16 11:19:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:24,937 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 6328 transitions. [2022-11-16 11:19:24,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6328 transitions. [2022-11-16 11:19:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:24,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:24,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:24,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-16 11:19:25,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:25,151 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:25,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:25,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1865251869, now seen corresponding path program 1 times [2022-11-16 11:19:25,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:25,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916353962] [2022-11-16 11:19:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:19:25,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:25,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:25,155 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:25,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:19:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:19:25,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:25,643 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:19:25,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:19:25,883 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:19:25,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:19:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:26,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:19:26,101 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:19:26,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:19:26,394 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 11:19:26,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:19:29,192 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 11:19:29,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:29,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916353962] [2022-11-16 11:19:29,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916353962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:19:29,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:19:29,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:19:29,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770460486] [2022-11-16 11:19:29,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:19:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:19:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:19:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:19:29,195 INFO L87 Difference]: Start difference. First operand 1656 states and 6328 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:30,629 INFO L93 Difference]: Finished difference Result 1759 states and 6610 transitions. [2022-11-16 11:19:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:19:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:19:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:30,653 INFO L225 Difference]: With dead ends: 1759 [2022-11-16 11:19:30,653 INFO L226 Difference]: Without dead ends: 1759 [2022-11-16 11:19:30,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:19:30,654 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:30,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 179 Unchecked, 1.2s Time] [2022-11-16 11:19:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-11-16 11:19:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1658. [2022-11-16 11:19:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1585 states have (on average 3.9949526813880127) internal successors, (6332), 1657 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 6332 transitions. [2022-11-16 11:19:30,697 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 6332 transitions. Word has length 13 [2022-11-16 11:19:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:30,698 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 6332 transitions. [2022-11-16 11:19:30,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 6332 transitions. [2022-11-16 11:19:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:30,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:30,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:30,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:19:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:30,912 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1865037969, now seen corresponding path program 2 times [2022-11-16 11:19:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:30,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359385683] [2022-11-16 11:19:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:19:30,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:30,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:30,914 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:30,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:31,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:19:31,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:19:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:19:31,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:31,390 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:19:31,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:19:31,636 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:19:31,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:19:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:31,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:19:31,797 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:19:31,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:19:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:19:32,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:19:32,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:32,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359385683] [2022-11-16 11:19:32,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359385683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:19:32,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:19:32,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:19:32,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632965199] [2022-11-16 11:19:32,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:19:32,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:19:32,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:32,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:19:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:19:32,088 INFO L87 Difference]: Start difference. First operand 1658 states and 6332 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:32,566 INFO L93 Difference]: Finished difference Result 1692 states and 6429 transitions. [2022-11-16 11:19:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:19:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:19:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:32,572 INFO L225 Difference]: With dead ends: 1692 [2022-11-16 11:19:32,572 INFO L226 Difference]: Without dead ends: 1692 [2022-11-16 11:19:32,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:19:32,573 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:32,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-16 11:19:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-11-16 11:19:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1658. [2022-11-16 11:19:32,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1585 states have (on average 3.9949526813880127) internal successors, (6332), 1657 states have internal predecessors, (6332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 6332 transitions. [2022-11-16 11:19:32,602 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 6332 transitions. Word has length 13 [2022-11-16 11:19:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:32,603 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 6332 transitions. [2022-11-16 11:19:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 6332 transitions. [2022-11-16 11:19:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:32,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:32,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:32,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-16 11:19:32,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:32,822 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1871190849, now seen corresponding path program 3 times [2022-11-16 11:19:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:32,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795923823] [2022-11-16 11:19:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:19:32,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:32,824 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:32,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:33,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:19:33,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:19:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:19:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:33,311 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:19:33,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:19:33,562 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:19:33,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:19:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:33,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:19:33,728 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:19:33,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:19:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:19:34,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:19:34,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:34,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795923823] [2022-11-16 11:19:34,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795923823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:19:34,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:19:34,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:19:34,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991152437] [2022-11-16 11:19:34,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:19:34,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:19:34,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:19:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:19:34,049 INFO L87 Difference]: Start difference. First operand 1658 states and 6332 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:34,538 INFO L93 Difference]: Finished difference Result 1682 states and 6405 transitions. [2022-11-16 11:19:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:19:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:19:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:34,544 INFO L225 Difference]: With dead ends: 1682 [2022-11-16 11:19:34,544 INFO L226 Difference]: Without dead ends: 1682 [2022-11-16 11:19:34,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:19:34,544 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:34,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 16 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-16 11:19:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-11-16 11:19:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1659. [2022-11-16 11:19:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1586 states have (on average 3.9949558638083227) internal successors, (6336), 1658 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 6336 transitions. [2022-11-16 11:19:34,571 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 6336 transitions. Word has length 13 [2022-11-16 11:19:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:34,571 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 6336 transitions. [2022-11-16 11:19:34,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 6336 transitions. [2022-11-16 11:19:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:34,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:34,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:34,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:34,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:34,772 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1864537629, now seen corresponding path program 4 times [2022-11-16 11:19:34,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:34,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284463654] [2022-11-16 11:19:34,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:19:34,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:34,775 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:34,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:35,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:19:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:19:35,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:19:35,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:35,291 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:19:35,292 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:19:35,533 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:19:35,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:19:35,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:35,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:19:35,742 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:19:35,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:19:36,007 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 11:19:36,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:19:38,778 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 11:19:38,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:38,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284463654] [2022-11-16 11:19:38,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284463654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:19:38,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:19:38,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:19:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648829828] [2022-11-16 11:19:38,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:19:38,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:19:38,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:19:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:19:38,780 INFO L87 Difference]: Start difference. First operand 1659 states and 6336 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:40,144 INFO L93 Difference]: Finished difference Result 1759 states and 6608 transitions. [2022-11-16 11:19:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:19:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:19:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:40,150 INFO L225 Difference]: With dead ends: 1759 [2022-11-16 11:19:40,150 INFO L226 Difference]: Without dead ends: 1759 [2022-11-16 11:19:40,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:19:40,151 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:40,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 100 Unchecked, 1.1s Time] [2022-11-16 11:19:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-11-16 11:19:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1656. [2022-11-16 11:19:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1583 states have (on average 3.9968414403032217) internal successors, (6327), 1655 states have internal predecessors, (6327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6327 transitions. [2022-11-16 11:19:40,177 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6327 transitions. Word has length 13 [2022-11-16 11:19:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:40,178 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 6327 transitions. [2022-11-16 11:19:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6327 transitions. [2022-11-16 11:19:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:40,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:40,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:40,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:40,381 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1670541005, now seen corresponding path program 1 times [2022-11-16 11:19:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:40,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909274089] [2022-11-16 11:19:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:19:40,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:40,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:40,383 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:40,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:19:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:19:40,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:19:41,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:19:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:19:41,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909274089] [2022-11-16 11:19:41,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909274089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:19:41,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:19:41,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:19:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295724426] [2022-11-16 11:19:41,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:19:41,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:19:41,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:19:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:19:41,636 INFO L87 Difference]: Start difference. First operand 1656 states and 6327 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:44,021 INFO L93 Difference]: Finished difference Result 1741 states and 6409 transitions. [2022-11-16 11:19:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:19:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:19:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:44,027 INFO L225 Difference]: With dead ends: 1741 [2022-11-16 11:19:44,027 INFO L226 Difference]: Without dead ends: 1741 [2022-11-16 11:19:44,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:19:44,027 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 167 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:44,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 42 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 407 Invalid, 0 Unknown, 135 Unchecked, 2.2s Time] [2022-11-16 11:19:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-16 11:19:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1705. [2022-11-16 11:19:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1632 states have (on average 3.909313725490196) internal successors, (6380), 1704 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 6380 transitions. [2022-11-16 11:19:44,063 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 6380 transitions. Word has length 13 [2022-11-16 11:19:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:44,063 INFO L495 AbstractCegarLoop]: Abstraction has 1705 states and 6380 transitions. [2022-11-16 11:19:44,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 6380 transitions. [2022-11-16 11:19:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:44,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:44,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:44,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:44,277 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1670542834, now seen corresponding path program 1 times [2022-11-16 11:19:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:44,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013414169] [2022-11-16 11:19:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:19:44,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:44,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:44,280 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:44,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:19:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:19:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:44,806 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:19:44,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:19:45,050 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:19:45,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:19:45,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:19:45,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:19:45,302 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:19:45,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:19:45,723 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 11:19:45,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:19:47,685 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 11:19:47,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013414169] [2022-11-16 11:19:47,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013414169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:19:47,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:19:47,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:19:47,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276789024] [2022-11-16 11:19:47,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:19:47,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:19:47,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:47,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:19:47,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:19:47,687 INFO L87 Difference]: Start difference. First operand 1705 states and 6380 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:19:49,100 INFO L93 Difference]: Finished difference Result 1729 states and 6502 transitions. [2022-11-16 11:19:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:19:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:19:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:19:49,106 INFO L225 Difference]: With dead ends: 1729 [2022-11-16 11:19:49,106 INFO L226 Difference]: Without dead ends: 1729 [2022-11-16 11:19:49,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:19:49,107 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:19:49,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 133 Unchecked, 0.7s Time] [2022-11-16 11:19:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-11-16 11:19:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1729. [2022-11-16 11:19:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1656 states have (on average 3.926328502415459) internal successors, (6502), 1728 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 6502 transitions. [2022-11-16 11:19:49,137 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 6502 transitions. Word has length 13 [2022-11-16 11:19:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:19:49,138 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 6502 transitions. [2022-11-16 11:19:49,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:19:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 6502 transitions. [2022-11-16 11:19:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:19:49,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:19:49,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:19:49,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:49,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:49,339 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:19:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:19:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1670542832, now seen corresponding path program 1 times [2022-11-16 11:19:49,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:19:49,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840548400] [2022-11-16 11:19:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:19:49,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:19:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:19:49,341 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:19:49,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:19:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:19:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:19:49,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:19:49,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:19:50,081 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 11:19:50,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:19:55,212 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 11:19:55,212 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:19:55,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840548400] [2022-11-16 11:19:55,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840548400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:19:55,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:19:55,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 11:19:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263691311] [2022-11-16 11:19:55,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:19:55,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:19:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:19:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:19:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=100, Unknown=2, NotChecked=0, Total=132 [2022-11-16 11:19:55,214 INFO L87 Difference]: Start difference. First operand 1729 states and 6502 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:00,833 INFO L93 Difference]: Finished difference Result 1765 states and 6600 transitions. [2022-11-16 11:20:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:20:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:20:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:00,839 INFO L225 Difference]: With dead ends: 1765 [2022-11-16 11:20:00,839 INFO L226 Difference]: Without dead ends: 1765 [2022-11-16 11:20:00,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=50, Invalid=156, Unknown=4, NotChecked=0, Total=210 [2022-11-16 11:20:00,840 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:00,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 138 Unchecked, 1.0s Time] [2022-11-16 11:20:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-11-16 11:20:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1737. [2022-11-16 11:20:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1664 states have (on average 3.9194711538461537) internal successors, (6522), 1736 states have internal predecessors, (6522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 6522 transitions. [2022-11-16 11:20:00,870 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 6522 transitions. Word has length 13 [2022-11-16 11:20:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:00,871 INFO L495 AbstractCegarLoop]: Abstraction has 1737 states and 6522 transitions. [2022-11-16 11:20:00,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 6522 transitions. [2022-11-16 11:20:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:00,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:00,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:00,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:01,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:01,072 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1670569699, now seen corresponding path program 1 times [2022-11-16 11:20:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:01,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147191544] [2022-11-16 11:20:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:01,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:01,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:01,074 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:01,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:20:01,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:01,636 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:20:01,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:20:01,880 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:01,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:02,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:02,097 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:02,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:02,402 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 11:20:02,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:03,281 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 11:20:03,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147191544] [2022-11-16 11:20:03,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147191544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:03,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:03,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:20:03,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542246909] [2022-11-16 11:20:03,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:03,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:20:03,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:03,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:20:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:20:03,283 INFO L87 Difference]: Start difference. First operand 1737 states and 6522 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:03,612 INFO L93 Difference]: Finished difference Result 1761 states and 6623 transitions. [2022-11-16 11:20:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:20:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:20:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:03,617 INFO L225 Difference]: With dead ends: 1761 [2022-11-16 11:20:03,617 INFO L226 Difference]: Without dead ends: 1761 [2022-11-16 11:20:03,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:20:03,618 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:03,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-11-16 11:20:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-11-16 11:20:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1743. [2022-11-16 11:20:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1670 states have (on average 3.918562874251497) internal successors, (6544), 1742 states have internal predecessors, (6544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 6544 transitions. [2022-11-16 11:20:03,649 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 6544 transitions. Word has length 13 [2022-11-16 11:20:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:03,649 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 6544 transitions. [2022-11-16 11:20:03,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 6544 transitions. [2022-11-16 11:20:03,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:03,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:03,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:03,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:03,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:03,854 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:03,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1670415424, now seen corresponding path program 2 times [2022-11-16 11:20:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:03,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635554954] [2022-11-16 11:20:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:03,857 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:03,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:04,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:20:04,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:20:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:04,362 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:20:04,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:20:04,596 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:04,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:04,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:04,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:04,753 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:04,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:20:05,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:05,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:05,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635554954] [2022-11-16 11:20:05,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635554954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:05,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:05,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:20:05,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767721369] [2022-11-16 11:20:05,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:05,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:20:05,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:05,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:20:05,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:20:05,174 INFO L87 Difference]: Start difference. First operand 1743 states and 6544 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:06,057 INFO L93 Difference]: Finished difference Result 2099 states and 8019 transitions. [2022-11-16 11:20:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:20:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:20:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:06,064 INFO L225 Difference]: With dead ends: 2099 [2022-11-16 11:20:06,064 INFO L226 Difference]: Without dead ends: 2099 [2022-11-16 11:20:06,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 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 11:20:06,065 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 121 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:06,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 6 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:20:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2022-11-16 11:20:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1892. [2022-11-16 11:20:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1819 states have (on average 4.042880703683342) internal successors, (7354), 1891 states have internal predecessors, (7354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7354 transitions. [2022-11-16 11:20:06,103 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7354 transitions. Word has length 13 [2022-11-16 11:20:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:06,103 INFO L495 AbstractCegarLoop]: Abstraction has 1892 states and 7354 transitions. [2022-11-16 11:20:06,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7354 transitions. [2022-11-16 11:20:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:06,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:06,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:06,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:06,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:06,306 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1670415422, now seen corresponding path program 2 times [2022-11-16 11:20:06,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:06,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530162220] [2022-11-16 11:20:06,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:06,307 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 11:20:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:06,308 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:06,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:06,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:20:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:20:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:06,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:20:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:20:07,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:07,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:07,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530162220] [2022-11-16 11:20:07,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530162220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:07,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:07,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:20:07,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999644792] [2022-11-16 11:20:07,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:07,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:20:07,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:07,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:20:07,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:20:07,107 INFO L87 Difference]: Start difference. First operand 1892 states and 7354 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:07,994 INFO L93 Difference]: Finished difference Result 1858 states and 7046 transitions. [2022-11-16 11:20:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:20:07,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:20:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:08,000 INFO L225 Difference]: With dead ends: 1858 [2022-11-16 11:20:08,000 INFO L226 Difference]: Without dead ends: 1858 [2022-11-16 11:20:08,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:20:08,001 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 119 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:08,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:20:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-11-16 11:20:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1806. [2022-11-16 11:20:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1733 states have (on average 3.9503750721292556) internal successors, (6846), 1805 states have internal predecessors, (6846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 6846 transitions. [2022-11-16 11:20:08,032 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 6846 transitions. Word has length 13 [2022-11-16 11:20:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:08,033 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 6846 transitions. [2022-11-16 11:20:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 6846 transitions. [2022-11-16 11:20:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:08,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:08,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:08,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:08,240 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1670416249, now seen corresponding path program 2 times [2022-11-16 11:20:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:08,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844786040] [2022-11-16 11:20:08,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:08,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:08,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:08,242 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:08,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:08,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:20:08,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:20:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:08,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:20:08,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:20:08,969 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:08,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:09,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:09,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:09,140 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:09,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:20:09,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:09,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:09,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844786040] [2022-11-16 11:20:09,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844786040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:09,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:09,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:20:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625971088] [2022-11-16 11:20:09,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:09,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:20:09,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:20:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:20:09,490 INFO L87 Difference]: Start difference. First operand 1806 states and 6846 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:09,965 INFO L93 Difference]: Finished difference Result 1834 states and 6957 transitions. [2022-11-16 11:20:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:20:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:20:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:09,972 INFO L225 Difference]: With dead ends: 1834 [2022-11-16 11:20:09,972 INFO L226 Difference]: Without dead ends: 1834 [2022-11-16 11:20:09,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:20:09,972 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:09,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-16 11:20:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2022-11-16 11:20:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1798. [2022-11-16 11:20:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1725 states have (on average 3.9547826086956523) internal successors, (6822), 1797 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6822 transitions. [2022-11-16 11:20:10,008 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6822 transitions. Word has length 13 [2022-11-16 11:20:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:10,009 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 6822 transitions. [2022-11-16 11:20:10,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6822 transitions. [2022-11-16 11:20:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:10,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:10,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:10,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:10,210 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash -642519101, now seen corresponding path program 2 times [2022-11-16 11:20:10,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:10,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327095916] [2022-11-16 11:20:10,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:10,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:10,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:10,212 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:10,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:10,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:20:10,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:10,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:20:10,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:10,772 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:20:10,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 11:20:11,002 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:11,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:11,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:11,203 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:11,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:20:11,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:20:12,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:12,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327095916] [2022-11-16 11:20:12,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327095916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:12,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:12,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:20:12,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783878090] [2022-11-16 11:20:12,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:20:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:20:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:20:12,862 INFO L87 Difference]: Start difference. First operand 1798 states and 6822 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:20:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:15,756 INFO L93 Difference]: Finished difference Result 2816 states and 10127 transitions. [2022-11-16 11:20:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:20:15,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 13 [2022-11-16 11:20:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:15,765 INFO L225 Difference]: With dead ends: 2816 [2022-11-16 11:20:15,766 INFO L226 Difference]: Without dead ends: 2816 [2022-11-16 11:20:15,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:20:15,766 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:15,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 58 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 468 Invalid, 0 Unknown, 157 Unchecked, 2.7s Time] [2022-11-16 11:20:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-11-16 11:20:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2042. [2022-11-16 11:20:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 1969 states have (on average 4.067039106145251) internal successors, (8008), 2041 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 8008 transitions. [2022-11-16 11:20:15,812 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 8008 transitions. Word has length 13 [2022-11-16 11:20:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:15,812 INFO L495 AbstractCegarLoop]: Abstraction has 2042 states and 8008 transitions. [2022-11-16 11:20:15,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 11:20:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 8008 transitions. [2022-11-16 11:20:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:15,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:15,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:15,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:16,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:16,014 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:16,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:16,014 INFO L85 PathProgramCache]: Analyzing trace with hash -642519099, now seen corresponding path program 1 times [2022-11-16 11:20:16,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:16,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555916521] [2022-11-16 11:20:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:16,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:16,016 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:16,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:20:16,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:20:16,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:17,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-16 11:20:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:20:17,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:17,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555916521] [2022-11-16 11:20:17,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555916521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:17,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:17,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-16 11:20:17,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493894229] [2022-11-16 11:20:17,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:17,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:20:17,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:20:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:20:17,377 INFO L87 Difference]: Start difference. First operand 2042 states and 8008 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 11:20:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:22,905 INFO L93 Difference]: Finished difference Result 6042 states and 22856 transitions. [2022-11-16 11:20:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:20:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 13 [2022-11-16 11:20:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:22,929 INFO L225 Difference]: With dead ends: 6042 [2022-11-16 11:20:22,929 INFO L226 Difference]: Without dead ends: 6042 [2022-11-16 11:20:22,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:20:22,930 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 983 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:22,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 62 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 11:20:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2022-11-16 11:20:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 2042. [2022-11-16 11:20:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 1969 states have (on average 3.9659725749111225) internal successors, (7809), 2041 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7809 transitions. [2022-11-16 11:20:23,033 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7809 transitions. Word has length 13 [2022-11-16 11:20:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:23,034 INFO L495 AbstractCegarLoop]: Abstraction has 2042 states and 7809 transitions. [2022-11-16 11:20:23,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 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 11:20:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7809 transitions. [2022-11-16 11:20:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:23,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:23,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:23,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:23,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:23,235 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash -643732609, now seen corresponding path program 1 times [2022-11-16 11:20:23,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152159549] [2022-11-16 11:20:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:23,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:23,237 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:23,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:20:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:23,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:20:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:20:23,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:20:25,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152159549] [2022-11-16 11:20:25,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152159549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:25,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:25,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:20:25,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009659677] [2022-11-16 11:20:25,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:25,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:20:25,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:20:25,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:20:25,231 INFO L87 Difference]: Start difference. First operand 2042 states and 7809 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 11:20:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:31,041 INFO L93 Difference]: Finished difference Result 2937 states and 9976 transitions. [2022-11-16 11:20:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:20:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 13 [2022-11-16 11:20:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:31,050 INFO L225 Difference]: With dead ends: 2937 [2022-11-16 11:20:31,051 INFO L226 Difference]: Without dead ends: 2937 [2022-11-16 11:20:31,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:20:31,051 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 543 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:31,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 33 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:20:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2022-11-16 11:20:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2042. [2022-11-16 11:20:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 1969 states have (on average 3.7364144235652614) internal successors, (7357), 2041 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7357 transitions. [2022-11-16 11:20:31,113 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7357 transitions. Word has length 13 [2022-11-16 11:20:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:31,113 INFO L495 AbstractCegarLoop]: Abstraction has 2042 states and 7357 transitions. [2022-11-16 11:20:31,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 11:20:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7357 transitions. [2022-11-16 11:20:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:20:31,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:31,115 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:31,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:31,329 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1132358825, now seen corresponding path program 2 times [2022-11-16 11:20:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:31,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281800879] [2022-11-16 11:20:31,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:31,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:31,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:31,331 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:31,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:31,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:20:31,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:20:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:31,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:31,791 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-16 11:20:31,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-16 11:20:31,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 11:20:32,080 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-16 11:20:32,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 42 [2022-11-16 11:20:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:20:32,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:32,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281800879] [2022-11-16 11:20:32,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281800879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:32,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:32,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:32,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987748768] [2022-11-16 11:20:32,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:20:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:20:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:32,581 INFO L87 Difference]: Start difference. First operand 2042 states and 7357 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:33,095 INFO L93 Difference]: Finished difference Result 2036 states and 7340 transitions. [2022-11-16 11:20:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:20:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:20:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:33,101 INFO L225 Difference]: With dead ends: 2036 [2022-11-16 11:20:33,101 INFO L226 Difference]: Without dead ends: 2036 [2022-11-16 11:20:33,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:20:33,102 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:33,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-11-16 11:20:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-11-16 11:20:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 2036. [2022-11-16 11:20:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 1964 states have (on average 3.7372708757637474) internal successors, (7340), 2035 states have internal predecessors, (7340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 7340 transitions. [2022-11-16 11:20:33,134 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 7340 transitions. Word has length 13 [2022-11-16 11:20:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:33,135 INFO L495 AbstractCegarLoop]: Abstraction has 2036 states and 7340 transitions. [2022-11-16 11:20:33,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 7340 transitions. [2022-11-16 11:20:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:20:33,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:33,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:33,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:33,336 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1988249532, now seen corresponding path program 1 times [2022-11-16 11:20:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:33,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764345636] [2022-11-16 11:20:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:33,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:33,338 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:33,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:33,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:20:33,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:33,838 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:20:33,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-16 11:20:33,868 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 11:20:34,126 INFO L321 Elim1Store]: treesize reduction 28, result has 34.9 percent of original size [2022-11-16 11:20:34,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-11-16 11:20:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:20:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:20:36,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764345636] [2022-11-16 11:20:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764345636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:36,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:36,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:20:36,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265767634] [2022-11-16 11:20:36,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:36,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:20:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:36,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:20:36,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:20:36,127 INFO L87 Difference]: Start difference. First operand 2036 states and 7340 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:20:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:37,513 INFO L93 Difference]: Finished difference Result 2357 states and 8196 transitions. [2022-11-16 11:20:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:20:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:20:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:37,522 INFO L225 Difference]: With dead ends: 2357 [2022-11-16 11:20:37,522 INFO L226 Difference]: Without dead ends: 2357 [2022-11-16 11:20:37,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:20:37,522 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:37,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 56 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 98 Unchecked, 1.2s Time] [2022-11-16 11:20:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-16 11:20:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2042. [2022-11-16 11:20:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 1970 states have (on average 3.7324873096446702) internal successors, (7353), 2041 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7353 transitions. [2022-11-16 11:20:37,557 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7353 transitions. Word has length 14 [2022-11-16 11:20:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:37,558 INFO L495 AbstractCegarLoop]: Abstraction has 2042 states and 7353 transitions. [2022-11-16 11:20:37,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:20:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7353 transitions. [2022-11-16 11:20:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:20:37,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:37,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:37,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:37,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:37,773 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1988234511, now seen corresponding path program 1 times [2022-11-16 11:20:37,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:37,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606646004] [2022-11-16 11:20:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:37,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:37,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:37,775 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:37,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:20:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:38,347 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:20:38,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:20:38,592 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:38,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:38,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:38,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:38,815 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:38,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:39,151 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 11:20:39,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:42,040 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 11:20:42,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606646004] [2022-11-16 11:20:42,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606646004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:42,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:42,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:20:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134510660] [2022-11-16 11:20:42,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:42,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:20:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:20:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:20:42,042 INFO L87 Difference]: Start difference. First operand 2042 states and 7353 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:20:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:43,237 INFO L93 Difference]: Finished difference Result 2196 states and 7801 transitions. [2022-11-16 11:20:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:20:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:20:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:43,246 INFO L225 Difference]: With dead ends: 2196 [2022-11-16 11:20:43,247 INFO L226 Difference]: Without dead ends: 2196 [2022-11-16 11:20:43,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:20:43,247 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:43,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 36 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 130 Unchecked, 1.1s Time] [2022-11-16 11:20:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2022-11-16 11:20:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2046. [2022-11-16 11:20:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 1974 states have (on average 3.7299898682877406) internal successors, (7363), 2045 states have internal predecessors, (7363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 7363 transitions. [2022-11-16 11:20:43,294 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 7363 transitions. Word has length 14 [2022-11-16 11:20:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:43,295 INFO L495 AbstractCegarLoop]: Abstraction has 2046 states and 7363 transitions. [2022-11-16 11:20:43,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:20:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 7363 transitions. [2022-11-16 11:20:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:20:43,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:43,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:43,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:43,496 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1981561761, now seen corresponding path program 2 times [2022-11-16 11:20:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234080225] [2022-11-16 11:20:43,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:43,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:43,498 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:43,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:43,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:20:43,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:43,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:20:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:43,975 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:20:43,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:20:44,207 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:44,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:44,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:44,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:44,398 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:44,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:20:44,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:44,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:44,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234080225] [2022-11-16 11:20:44,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234080225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:44,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:44,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:20:44,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787045818] [2022-11-16 11:20:44,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:44,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:20:44,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:20:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:20:44,703 INFO L87 Difference]: Start difference. First operand 2046 states and 7363 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:45,137 INFO L93 Difference]: Finished difference Result 2105 states and 7532 transitions. [2022-11-16 11:20:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:20:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:20:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:45,143 INFO L225 Difference]: With dead ends: 2105 [2022-11-16 11:20:45,143 INFO L226 Difference]: Without dead ends: 2105 [2022-11-16 11:20:45,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:20:45,144 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:45,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-11-16 11:20:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-11-16 11:20:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2046. [2022-11-16 11:20:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 1974 states have (on average 3.7299898682877406) internal successors, (7363), 2045 states have internal predecessors, (7363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 7363 transitions. [2022-11-16 11:20:45,183 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 7363 transitions. Word has length 14 [2022-11-16 11:20:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:45,184 INFO L495 AbstractCegarLoop]: Abstraction has 2046 states and 7363 transitions. [2022-11-16 11:20:45,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 7363 transitions. [2022-11-16 11:20:45,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:20:45,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:45,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:45,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:45,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:45,385 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:45,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1981603611, now seen corresponding path program 3 times [2022-11-16 11:20:45,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:45,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684215637] [2022-11-16 11:20:45,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:20:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:45,387 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:45,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:45,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:20:45,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:45,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:20:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:45,920 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:20:45,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:20:46,168 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:46,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:46,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:46,339 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:46,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:20:46,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:46,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684215637] [2022-11-16 11:20:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684215637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:46,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:46,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:20:46,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318536761] [2022-11-16 11:20:46,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:46,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:20:46,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:20:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:20:46,689 INFO L87 Difference]: Start difference. First operand 2046 states and 7363 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:47,178 INFO L93 Difference]: Finished difference Result 2101 states and 7538 transitions. [2022-11-16 11:20:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:20:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:20:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:47,184 INFO L225 Difference]: With dead ends: 2101 [2022-11-16 11:20:47,184 INFO L226 Difference]: Without dead ends: 2101 [2022-11-16 11:20:47,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:20:47,185 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:47,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-16 11:20:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-11-16 11:20:47,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 2046. [2022-11-16 11:20:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 1974 states have (on average 3.7299898682877406) internal successors, (7363), 2045 states have internal predecessors, (7363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 7363 transitions. [2022-11-16 11:20:47,218 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 7363 transitions. Word has length 14 [2022-11-16 11:20:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:47,218 INFO L495 AbstractCegarLoop]: Abstraction has 2046 states and 7363 transitions. [2022-11-16 11:20:47,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 7363 transitions. [2022-11-16 11:20:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:20:47,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:47,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:47,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-16 11:20:47,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:47,420 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2122624405, now seen corresponding path program 4 times [2022-11-16 11:20:47,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:47,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977008137] [2022-11-16 11:20:47,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:20:47,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:47,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:47,421 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:47,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:47,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:20:47,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:20:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:47,994 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:20:47,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:20:48,254 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:20:48,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:20:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:48,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:48,483 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:48,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:48,841 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 11:20:48,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:55,097 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 11:20:55,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:55,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977008137] [2022-11-16 11:20:55,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977008137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:55,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:55,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:20:55,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915199837] [2022-11-16 11:20:55,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:55,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:20:55,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:20:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:20:55,099 INFO L87 Difference]: Start difference. First operand 2046 states and 7363 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:20:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:56,280 INFO L93 Difference]: Finished difference Result 2196 states and 7799 transitions. [2022-11-16 11:20:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:20:56,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:20:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:56,286 INFO L225 Difference]: With dead ends: 2196 [2022-11-16 11:20:56,286 INFO L226 Difference]: Without dead ends: 2196 [2022-11-16 11:20:56,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:20:56,287 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:56,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 77 Unchecked, 1.1s Time] [2022-11-16 11:20:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2022-11-16 11:20:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2051. [2022-11-16 11:20:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 1979 states have (on average 3.7306720565942397) internal successors, (7383), 2050 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7383 transitions. [2022-11-16 11:20:56,321 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7383 transitions. Word has length 14 [2022-11-16 11:20:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:56,321 INFO L495 AbstractCegarLoop]: Abstraction has 2051 states and 7383 transitions. [2022-11-16 11:20:56,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:20:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7383 transitions. [2022-11-16 11:20:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:20:56,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:56,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:56,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:56,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:56,523 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2122697734, now seen corresponding path program 2 times [2022-11-16 11:20:56,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:56,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793889052] [2022-11-16 11:20:56,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:56,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:56,525 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:56,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:56,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:20:56,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:20:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:56,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:56,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:56,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:56,938 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 11:20:56,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 11:20:56,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 11:20:57,040 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:20:57,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:20:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:20:57,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:57,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:57,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793889052] [2022-11-16 11:20:57,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793889052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:57,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:57,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:57,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915981504] [2022-11-16 11:20:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:20:57,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:20:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:57,469 INFO L87 Difference]: Start difference. First operand 2051 states and 7383 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:57,678 INFO L93 Difference]: Finished difference Result 2071 states and 7431 transitions. [2022-11-16 11:20:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:20:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:20:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:57,685 INFO L225 Difference]: With dead ends: 2071 [2022-11-16 11:20:57,685 INFO L226 Difference]: Without dead ends: 2071 [2022-11-16 11:20:57,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:57,685 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:57,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-16 11:20:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-11-16 11:20:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2063. [2022-11-16 11:20:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 1991 states have (on average 3.724761426418885) internal successors, (7416), 2062 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7416 transitions. [2022-11-16 11:20:57,722 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7416 transitions. Word has length 14 [2022-11-16 11:20:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:57,723 INFO L495 AbstractCegarLoop]: Abstraction has 2063 states and 7416 transitions. [2022-11-16 11:20:57,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:20:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7416 transitions. [2022-11-16 11:20:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:20:57,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:57,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:57,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:57,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:57,934 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:20:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1964945451, now seen corresponding path program 5 times [2022-11-16 11:20:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:20:57,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276557018] [2022-11-16 11:20:57,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:20:57,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:20:57,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:20:57,936 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:20:57,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:20:58,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:20:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:58,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:20:58,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:20:58,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:20:58,369 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:20:58,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:20:58,565 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 11:20:58,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:59,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-16 11:20:59,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:20:59,358 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 48 treesize of output 72 [2022-11-16 11:20:59,637 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 11:20:59,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:20:59,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276557018] [2022-11-16 11:20:59,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276557018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:59,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:59,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 11:20:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626843058] [2022-11-16 11:20:59,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:59,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:20:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:20:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:20:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:20:59,638 INFO L87 Difference]: Start difference. First operand 2063 states and 7416 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:21:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:02,282 INFO L93 Difference]: Finished difference Result 2060 states and 7385 transitions. [2022-11-16 11:21:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:21:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:21:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:02,288 INFO L225 Difference]: With dead ends: 2060 [2022-11-16 11:21:02,288 INFO L226 Difference]: Without dead ends: 2060 [2022-11-16 11:21:02,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:21:02,289 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 142 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:02,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 24 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 236 Invalid, 0 Unknown, 82 Unchecked, 2.1s Time] [2022-11-16 11:21:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-11-16 11:21:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1994. [2022-11-16 11:21:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1922 states have (on average 3.749739854318418) internal successors, (7207), 1993 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 7207 transitions. [2022-11-16 11:21:02,323 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 7207 transitions. Word has length 14 [2022-11-16 11:21:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:02,323 INFO L495 AbstractCegarLoop]: Abstraction has 1994 states and 7207 transitions. [2022-11-16 11:21:02,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 11:21:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 7207 transitions. [2022-11-16 11:21:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:21:02,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:02,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:02,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:02,538 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1556748276, now seen corresponding path program 3 times [2022-11-16 11:21:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:02,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731324699] [2022-11-16 11:21:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:21:02,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:02,540 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:02,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:02,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:21:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:21:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:03,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:21:03,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:21:03,422 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:21:03,422 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:21:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:03,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-16 11:21:03,689 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:21:03,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:21:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:21:04,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:21:06,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:06,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731324699] [2022-11-16 11:21:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731324699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:06,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:06,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:21:06,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647199970] [2022-11-16 11:21:06,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:06,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:21:06,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:06,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:21:06,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:21:06,807 INFO L87 Difference]: Start difference. First operand 1994 states and 7207 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:07,606 INFO L93 Difference]: Finished difference Result 2012 states and 7309 transitions. [2022-11-16 11:21:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:21:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:21:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:07,612 INFO L225 Difference]: With dead ends: 2012 [2022-11-16 11:21:07,612 INFO L226 Difference]: Without dead ends: 2012 [2022-11-16 11:21:07,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:21:07,613 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:07,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 67 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2022-11-16 11:21:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2022-11-16 11:21:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 2012. [2022-11-16 11:21:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 1940 states have (on average 3.7675257731958762) internal successors, (7309), 2011 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 7309 transitions. [2022-11-16 11:21:07,644 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 7309 transitions. Word has length 14 [2022-11-16 11:21:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:07,644 INFO L495 AbstractCegarLoop]: Abstraction has 2012 states and 7309 transitions. [2022-11-16 11:21:07,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 7309 transitions. [2022-11-16 11:21:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:21:07,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:07,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:07,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:07,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:07,846 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1556748278, now seen corresponding path program 2 times [2022-11-16 11:21:07,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:07,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069635498] [2022-11-16 11:21:07,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:21:07,846 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:07,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:07,847 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:07,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:08,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:21:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:08,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:21:08,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:08,382 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:21:08,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:21:08,639 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:21:08,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:21:08,771 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:21:08,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:21:08,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:21:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:21:09,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:09,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069635498] [2022-11-16 11:21:09,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069635498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:09,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:09,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:21:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254439301] [2022-11-16 11:21:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:09,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:21:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:21:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:21:09,152 INFO L87 Difference]: Start difference. First operand 2012 states and 7309 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:09,456 INFO L93 Difference]: Finished difference Result 2006 states and 7267 transitions. [2022-11-16 11:21:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:21:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:21:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:09,461 INFO L225 Difference]: With dead ends: 2006 [2022-11-16 11:21:09,461 INFO L226 Difference]: Without dead ends: 2006 [2022-11-16 11:21:09,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:21:09,462 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:09,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-11-16 11:21:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-11-16 11:21:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 2006. [2022-11-16 11:21:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 1934 states have (on average 3.7574974146845914) internal successors, (7267), 2005 states have internal predecessors, (7267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7267 transitions. [2022-11-16 11:21:09,492 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7267 transitions. Word has length 14 [2022-11-16 11:21:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:09,493 INFO L495 AbstractCegarLoop]: Abstraction has 2006 states and 7267 transitions. [2022-11-16 11:21:09,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7267 transitions. [2022-11-16 11:21:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:21:09,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:09,493 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:09,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:09,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:09,694 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash -806625465, now seen corresponding path program 2 times [2022-11-16 11:21:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:09,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523663072] [2022-11-16 11:21:09,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:21:09,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:09,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:09,696 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:09,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:09,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:21:09,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:21:09,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:09,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:09,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:10,139 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-16 11:21:10,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-16 11:21:10,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 11:21:10,350 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:21:10,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:21:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:21:10,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:10,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:10,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523663072] [2022-11-16 11:21:10,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523663072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:10,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:10,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:21:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534925622] [2022-11-16 11:21:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:10,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:21:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:21:10,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:21:10,883 INFO L87 Difference]: Start difference. First operand 2006 states and 7267 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:11,156 INFO L93 Difference]: Finished difference Result 2005 states and 7266 transitions. [2022-11-16 11:21:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:21:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:21:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:11,163 INFO L225 Difference]: With dead ends: 2005 [2022-11-16 11:21:11,163 INFO L226 Difference]: Without dead ends: 2005 [2022-11-16 11:21:11,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:21:11,164 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:11,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-11-16 11:21:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-11-16 11:21:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 2004. [2022-11-16 11:21:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 1933 states have (on average 3.7584066218313503) internal successors, (7265), 2003 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7265 transitions. [2022-11-16 11:21:11,210 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7265 transitions. Word has length 14 [2022-11-16 11:21:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:11,210 INFO L495 AbstractCegarLoop]: Abstraction has 2004 states and 7265 transitions. [2022-11-16 11:21:11,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7265 transitions. [2022-11-16 11:21:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:21:11,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:11,211 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:11,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:11,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:11,423 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:11,423 INFO L85 PathProgramCache]: Analyzing trace with hash -528599858, now seen corresponding path program 1 times [2022-11-16 11:21:11,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:11,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221917605] [2022-11-16 11:21:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:11,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:11,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:11,425 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:11,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:11,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:21:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:12,003 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:21:12,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:21:12,236 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 24 treesize of output 18 [2022-11-16 11:21:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:12,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:21:13,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221917605] [2022-11-16 11:21:13,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221917605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:13,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:13,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 11:21:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708465223] [2022-11-16 11:21:13,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:13,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:21:13,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:13,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:21:13,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:21:13,433 INFO L87 Difference]: Start difference. First operand 2004 states and 7265 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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 11:21:17,361 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 11:21:19,444 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 11:21:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:23,059 INFO L93 Difference]: Finished difference Result 6101 states and 23139 transitions. [2022-11-16 11:21:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:21:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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 14 [2022-11-16 11:21:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:23,078 INFO L225 Difference]: With dead ends: 6101 [2022-11-16 11:21:23,079 INFO L226 Difference]: Without dead ends: 6101 [2022-11-16 11:21:23,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:21:23,079 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 456 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:23,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 81 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 908 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2022-11-16 11:21:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2022-11-16 11:21:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 2005. [2022-11-16 11:21:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 1934 states have (on average 3.7569803516028957) internal successors, (7266), 2004 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 7266 transitions. [2022-11-16 11:21:23,141 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 7266 transitions. Word has length 14 [2022-11-16 11:21:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:23,141 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 7266 transitions. [2022-11-16 11:21:23,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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 11:21:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 7266 transitions. [2022-11-16 11:21:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:21:23,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:23,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:23,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-16 11:21:23,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:23,346 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1014560165, now seen corresponding path program 1 times [2022-11-16 11:21:23,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:23,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395129650] [2022-11-16 11:21:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:23,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:23,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:23,348 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:23,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:21:23,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:23,987 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:21:23,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:21:24,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:21:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:21:24,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:21:25,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:25,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395129650] [2022-11-16 11:21:25,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395129650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:25,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:25,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:21:25,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922693676] [2022-11-16 11:21:25,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:25,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:21:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:21:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:21:25,522 INFO L87 Difference]: Start difference. First operand 2005 states and 7266 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 11:21:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:28,661 INFO L93 Difference]: Finished difference Result 3569 states and 14440 transitions. [2022-11-16 11:21:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:21:28,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 11:21:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:28,671 INFO L225 Difference]: With dead ends: 3569 [2022-11-16 11:21:28,671 INFO L226 Difference]: Without dead ends: 3569 [2022-11-16 11:21:28,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:21:28,672 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 168 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:28,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 79 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 660 Unchecked, 2.5s Time] [2022-11-16 11:21:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2022-11-16 11:21:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3096. [2022-11-16 11:21:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3025 states have (on average 4.326942148760331) internal successors, (13089), 3095 states have internal predecessors, (13089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 13089 transitions. [2022-11-16 11:21:28,759 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 13089 transitions. Word has length 15 [2022-11-16 11:21:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:28,759 INFO L495 AbstractCegarLoop]: Abstraction has 3096 states and 13089 transitions. [2022-11-16 11:21:28,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 11:21:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 13089 transitions. [2022-11-16 11:21:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:21:28,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:28,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:28,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:28,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:28,976 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1014560167, now seen corresponding path program 1 times [2022-11-16 11:21:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:28,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300814315] [2022-11-16 11:21:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:28,977 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 11:21:28,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:28,978 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:28,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:29,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:21:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:29,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:21:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:21:30,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:21:31,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:31,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300814315] [2022-11-16 11:21:31,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300814315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:31,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:31,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:21:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491626134] [2022-11-16 11:21:31,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:31,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:21:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:21:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:21:31,489 INFO L87 Difference]: Start difference. First operand 3096 states and 13089 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:33,623 INFO L93 Difference]: Finished difference Result 3446 states and 14595 transitions. [2022-11-16 11:21:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:21:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:21:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:33,634 INFO L225 Difference]: With dead ends: 3446 [2022-11-16 11:21:33,634 INFO L226 Difference]: Without dead ends: 3446 [2022-11-16 11:21:33,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:21:33,634 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:33,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 84 Unchecked, 1.8s Time] [2022-11-16 11:21:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2022-11-16 11:21:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 3238. [2022-11-16 11:21:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3167 states have (on average 4.355225765708873) internal successors, (13793), 3237 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 13793 transitions. [2022-11-16 11:21:33,716 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 13793 transitions. Word has length 15 [2022-11-16 11:21:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:33,717 INFO L495 AbstractCegarLoop]: Abstraction has 3238 states and 13793 transitions. [2022-11-16 11:21:33,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 13793 transitions. [2022-11-16 11:21:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:21:33,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:33,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:33,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-16 11:21:33,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:33,918 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1014558307, now seen corresponding path program 2 times [2022-11-16 11:21:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:33,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614013777] [2022-11-16 11:21:33,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:21:33,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:33,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:33,921 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:33,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:34,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:21:34,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:21:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:34,440 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:21:34,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:21:34,684 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:21:34,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:21:34,838 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:21:34,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:21:34,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:21:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:21:35,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:21:35,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:35,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614013777] [2022-11-16 11:21:35,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614013777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:21:35,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:21:35,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:21:35,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657706842] [2022-11-16 11:21:35,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:21:35,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:21:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:35,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:21:35,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:21:35,296 INFO L87 Difference]: Start difference. First operand 3238 states and 13793 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:35,624 INFO L93 Difference]: Finished difference Result 3234 states and 13773 transitions. [2022-11-16 11:21:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:21:35,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:21:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:35,635 INFO L225 Difference]: With dead ends: 3234 [2022-11-16 11:21:35,635 INFO L226 Difference]: Without dead ends: 3234 [2022-11-16 11:21:35,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:21:35,636 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:35,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-11-16 11:21:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2022-11-16 11:21:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3234. [2022-11-16 11:21:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3163 states have (on average 4.354410369901991) internal successors, (13773), 3233 states have internal predecessors, (13773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 13773 transitions. [2022-11-16 11:21:35,704 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 13773 transitions. Word has length 15 [2022-11-16 11:21:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:35,704 INFO L495 AbstractCegarLoop]: Abstraction has 3234 states and 13773 transitions. [2022-11-16 11:21:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 13773 transitions. [2022-11-16 11:21:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:21:35,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:35,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:35,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-16 11:21:35,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:35,906 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1208273496, now seen corresponding path program 2 times [2022-11-16 11:21:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:35,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006499201] [2022-11-16 11:21:35,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:21:35,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:35,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:35,908 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:35,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:36,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:21:36,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:21:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:36,605 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:21:36,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:21:36,864 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:21:36,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:21:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:21:37,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:21:37,195 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:21:37,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:21:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:21:37,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:21:46,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:21:46,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006499201] [2022-11-16 11:21:46,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006499201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:46,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:21:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673427831] [2022-11-16 11:21:46,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:21:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:21:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:21:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:21:46,377 INFO L87 Difference]: Start difference. First operand 3234 states and 13773 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:55,037 INFO L93 Difference]: Finished difference Result 5756 states and 24148 transitions. [2022-11-16 11:21:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:21:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:21:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:55,056 INFO L225 Difference]: With dead ends: 5756 [2022-11-16 11:21:55,056 INFO L226 Difference]: Without dead ends: 5756 [2022-11-16 11:21:55,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:21:55,057 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 182 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:55,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 98 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 514 Invalid, 0 Unknown, 198 Unchecked, 5.2s Time] [2022-11-16 11:21:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5756 states. [2022-11-16 11:21:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5756 to 4599. [2022-11-16 11:21:55,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4528 states have (on average 4.406139575971731) internal successors, (19951), 4598 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 19951 transitions. [2022-11-16 11:21:55,212 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 19951 transitions. Word has length 15 [2022-11-16 11:21:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:55,213 INFO L495 AbstractCegarLoop]: Abstraction has 4599 states and 19951 transitions. [2022-11-16 11:21:55,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:21:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 19951 transitions. [2022-11-16 11:21:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:21:55,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:55,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:55,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:21:55,424 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:21:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1208273498, now seen corresponding path program 1 times [2022-11-16 11:21:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:21:55,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134008056] [2022-11-16 11:21:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:55,425 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 11:21:55,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:21:55,426 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:21:55,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:21:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:21:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:56,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:21:56,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:21:56,246 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:21:56,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:21:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:21:56,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:22:05,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134008056] [2022-11-16 11:22:05,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134008056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:05,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:05,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:22:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095799698] [2022-11-16 11:22:05,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:05,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:22:05,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:22:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=179, Unknown=3, NotChecked=0, Total=240 [2022-11-16 11:22:05,939 INFO L87 Difference]: Start difference. First operand 4599 states and 19951 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:12,946 INFO L93 Difference]: Finished difference Result 5567 states and 23012 transitions. [2022-11-16 11:22:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:22:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:22:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:12,988 INFO L225 Difference]: With dead ends: 5567 [2022-11-16 11:22:12,989 INFO L226 Difference]: Without dead ends: 5567 [2022-11-16 11:22:12,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=111, Invalid=348, Unknown=3, NotChecked=0, Total=462 [2022-11-16 11:22:12,989 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 182 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:12,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 98 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 648 Invalid, 0 Unknown, 486 Unchecked, 4.9s Time] [2022-11-16 11:22:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2022-11-16 11:22:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4599. [2022-11-16 11:22:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4528 states have (on average 4.281139575971731) internal successors, (19385), 4598 states have internal predecessors, (19385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 19385 transitions. [2022-11-16 11:22:13,110 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 19385 transitions. Word has length 15 [2022-11-16 11:22:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:13,110 INFO L495 AbstractCegarLoop]: Abstraction has 4599 states and 19385 transitions. [2022-11-16 11:22:13,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 19385 transitions. [2022-11-16 11:22:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:22:13,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:13,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:13,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:13,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:13,312 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash 207218202, now seen corresponding path program 2 times [2022-11-16 11:22:13,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:13,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426554990] [2022-11-16 11:22:13,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:13,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:13,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:13,314 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:13,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:13,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:13,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:13,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:22:13,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:13,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:13,809 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-16 11:22:13,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-16 11:22:13,835 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 11:22:14,031 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:22:14,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-16 11:22:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:22:14,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:14,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:14,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426554990] [2022-11-16 11:22:14,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426554990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:14,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:14,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:22:14,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836393983] [2022-11-16 11:22:14,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:14,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:22:14,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:22:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:22:14,417 INFO L87 Difference]: Start difference. First operand 4599 states and 19385 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 11:22:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:15,349 INFO L93 Difference]: Finished difference Result 4899 states and 20037 transitions. [2022-11-16 11:22:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:22:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 15 [2022-11-16 11:22:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:15,384 INFO L225 Difference]: With dead ends: 4899 [2022-11-16 11:22:15,384 INFO L226 Difference]: Without dead ends: 4899 [2022-11-16 11:22:15,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:22:15,384 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:15,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 12 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:22:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2022-11-16 11:22:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4459. [2022-11-16 11:22:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4403 states have (on average 4.280717692482399) internal successors, (18848), 4458 states have internal predecessors, (18848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 18848 transitions. [2022-11-16 11:22:15,518 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 18848 transitions. Word has length 15 [2022-11-16 11:22:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:15,519 INFO L495 AbstractCegarLoop]: Abstraction has 4459 states and 18848 transitions. [2022-11-16 11:22:15,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 11:22:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 18848 transitions. [2022-11-16 11:22:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:22:15,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:15,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:15,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:15,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:15,720 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1965050588, now seen corresponding path program 1 times [2022-11-16 11:22:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824962061] [2022-11-16 11:22:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:15,722 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 11:22:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:15,723 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:15,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:22:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:22:16,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:16,166 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:16,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824962061] [2022-11-16 11:22:16,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824962061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:16,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:16,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:16,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45936907] [2022-11-16 11:22:16,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:16,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:22:16,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:22:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:22:16,168 INFO L87 Difference]: Start difference. First operand 4459 states and 18848 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:16,515 INFO L93 Difference]: Finished difference Result 4326 states and 18358 transitions. [2022-11-16 11:22:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:22:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:22:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:16,545 INFO L225 Difference]: With dead ends: 4326 [2022-11-16 11:22:16,546 INFO L226 Difference]: Without dead ends: 4326 [2022-11-16 11:22:16,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 11:22:16,546 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:16,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:22:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-11-16 11:22:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4326. [2022-11-16 11:22:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4279 states have (on average 4.290254732414115) internal successors, (18358), 4325 states have internal predecessors, (18358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 18358 transitions. [2022-11-16 11:22:16,632 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 18358 transitions. Word has length 16 [2022-11-16 11:22:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:16,632 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 18358 transitions. [2022-11-16 11:22:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 18358 transitions. [2022-11-16 11:22:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:22:16,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:16,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:16,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:16,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:16,834 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1965050589, now seen corresponding path program 1 times [2022-11-16 11:22:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:16,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123928060] [2022-11-16 11:22:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:16,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:16,836 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:16,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:22:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:22:17,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:17,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123928060] [2022-11-16 11:22:17,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123928060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:17,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:17,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:22:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748253478] [2022-11-16 11:22:17,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:17,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:22:17,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:22:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:22:17,273 INFO L87 Difference]: Start difference. First operand 4326 states and 18358 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:17,666 INFO L93 Difference]: Finished difference Result 4193 states and 17868 transitions. [2022-11-16 11:22:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:22:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:22:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:17,681 INFO L225 Difference]: With dead ends: 4193 [2022-11-16 11:22:17,681 INFO L226 Difference]: Without dead ends: 4193 [2022-11-16 11:22:17,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 11:22:17,681 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:17,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 5 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:22:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2022-11-16 11:22:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 4193. [2022-11-16 11:22:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4193 states, 4155 states have (on average 4.300361010830325) internal successors, (17868), 4192 states have internal predecessors, (17868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4193 states to 4193 states and 17868 transitions. [2022-11-16 11:22:17,792 INFO L78 Accepts]: Start accepts. Automaton has 4193 states and 17868 transitions. Word has length 16 [2022-11-16 11:22:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:17,792 INFO L495 AbstractCegarLoop]: Abstraction has 4193 states and 17868 transitions. [2022-11-16 11:22:17,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4193 states and 17868 transitions. [2022-11-16 11:22:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:22:17,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:17,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:17,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-16 11:22:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:17,999 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1386376229, now seen corresponding path program 1 times [2022-11-16 11:22:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:17,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999460712] [2022-11-16 11:22:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:18,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:18,001 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:18,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:18,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:22:18,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:18,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:22:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:19,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:20,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:20,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999460712] [2022-11-16 11:22:20,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999460712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:20,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:20,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:22:20,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611761515] [2022-11-16 11:22:20,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:20,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:22:20,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:22:20,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:22:20,420 INFO L87 Difference]: Start difference. First operand 4193 states and 17868 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:22:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:22,263 INFO L93 Difference]: Finished difference Result 4379 states and 18676 transitions. [2022-11-16 11:22:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:22:22,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 16 [2022-11-16 11:22:22,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:22,276 INFO L225 Difference]: With dead ends: 4379 [2022-11-16 11:22:22,277 INFO L226 Difference]: Without dead ends: 4379 [2022-11-16 11:22:22,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:22:22,277 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:22,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 41 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 94 Unchecked, 1.5s Time] [2022-11-16 11:22:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2022-11-16 11:22:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 4269. [2022-11-16 11:22:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4269 states, 4231 states have (on average 4.318837154337036) internal successors, (18273), 4268 states have internal predecessors, (18273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 18273 transitions. [2022-11-16 11:22:22,352 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 18273 transitions. Word has length 16 [2022-11-16 11:22:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:22,352 INFO L495 AbstractCegarLoop]: Abstraction has 4269 states and 18273 transitions. [2022-11-16 11:22:22,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:22:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 18273 transitions. [2022-11-16 11:22:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:22:22,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:22,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:22,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:22,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:22,558 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1379666279, now seen corresponding path program 2 times [2022-11-16 11:22:22,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:22,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119775953] [2022-11-16 11:22:22,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:22,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:22,560 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:22,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:22,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:22:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:23,088 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:22:23,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:22:23,215 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:22:23,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:22:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:22:23,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:23,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:23,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119775953] [2022-11-16 11:22:23,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119775953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:23,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:23,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:22:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372355430] [2022-11-16 11:22:23,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:23,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:22:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:22:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:22:23,540 INFO L87 Difference]: Start difference. First operand 4269 states and 18273 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:23,791 INFO L93 Difference]: Finished difference Result 4250 states and 18171 transitions. [2022-11-16 11:22:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:22:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:22:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:23,803 INFO L225 Difference]: With dead ends: 4250 [2022-11-16 11:22:23,803 INFO L226 Difference]: Without dead ends: 4250 [2022-11-16 11:22:23,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:22:23,804 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:23,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-16 11:22:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2022-11-16 11:22:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 4246. [2022-11-16 11:22:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 4208 states have (on average 4.314638783269962) internal successors, (18156), 4245 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 18156 transitions. [2022-11-16 11:22:23,932 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 18156 transitions. Word has length 16 [2022-11-16 11:22:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:23,933 INFO L495 AbstractCegarLoop]: Abstraction has 4246 states and 18156 transitions. [2022-11-16 11:22:23,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 18156 transitions. [2022-11-16 11:22:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:22:23,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:23,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:23,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:24,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:24,135 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1386534515, now seen corresponding path program 1 times [2022-11-16 11:22:24,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:24,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838113747] [2022-11-16 11:22:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:24,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:24,137 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:24,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:22:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:24,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:22:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:25,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:26,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:26,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838113747] [2022-11-16 11:22:26,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838113747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:26,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:26,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:22:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48149068] [2022-11-16 11:22:26,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:26,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:22:26,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:22:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:22:26,648 INFO L87 Difference]: Start difference. First operand 4246 states and 18156 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:22:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:28,942 INFO L93 Difference]: Finished difference Result 5034 states and 21684 transitions. [2022-11-16 11:22:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:22:28,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 16 [2022-11-16 11:22:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:28,961 INFO L225 Difference]: With dead ends: 5034 [2022-11-16 11:22:28,962 INFO L226 Difference]: Without dead ends: 5034 [2022-11-16 11:22:28,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:22:28,962 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:28,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 51 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 267 Unchecked, 1.9s Time] [2022-11-16 11:22:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2022-11-16 11:22:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 4604. [2022-11-16 11:22:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4566 states have (on average 4.374507227332457) internal successors, (19974), 4603 states have internal predecessors, (19974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 19974 transitions. [2022-11-16 11:22:29,096 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 19974 transitions. Word has length 16 [2022-11-16 11:22:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:29,097 INFO L495 AbstractCegarLoop]: Abstraction has 4604 states and 19974 transitions. [2022-11-16 11:22:29,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:22:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 19974 transitions. [2022-11-16 11:22:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:22:29,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:29,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:29,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:29,299 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1384747055, now seen corresponding path program 2 times [2022-11-16 11:22:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031175195] [2022-11-16 11:22:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:29,300 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 11:22:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:29,301 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:29,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:29,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:22:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:29,882 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:22:29,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:22:30,103 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:22:30,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:22:30,209 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:22:30,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:22:30,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:22:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:22:30,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:30,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031175195] [2022-11-16 11:22:30,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031175195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:30,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:30,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:22:30,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47668411] [2022-11-16 11:22:30,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:30,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:22:30,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:22:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:22:30,634 INFO L87 Difference]: Start difference. First operand 4604 states and 19974 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:30,917 INFO L93 Difference]: Finished difference Result 4588 states and 19890 transitions. [2022-11-16 11:22:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:22:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:22:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:30,931 INFO L225 Difference]: With dead ends: 4588 [2022-11-16 11:22:30,931 INFO L226 Difference]: Without dead ends: 4588 [2022-11-16 11:22:30,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:22:30,931 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:30,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-16 11:22:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2022-11-16 11:22:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 4554. [2022-11-16 11:22:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4516 states have (on average 4.363596102745793) internal successors, (19706), 4553 states have internal predecessors, (19706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 19706 transitions. [2022-11-16 11:22:31,014 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 19706 transitions. Word has length 16 [2022-11-16 11:22:31,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:31,014 INFO L495 AbstractCegarLoop]: Abstraction has 4554 states and 19706 transitions. [2022-11-16 11:22:31,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 19706 transitions. [2022-11-16 11:22:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:22:31,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:31,016 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:31,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-16 11:22:31,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:31,217 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:31,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2072923022, now seen corresponding path program 4 times [2022-11-16 11:22:31,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:31,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864947287] [2022-11-16 11:22:31,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:22:31,218 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 11:22:31,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:31,218 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:31,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:31,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:22:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:31,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:22:31,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:31,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:22:32,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:22:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:32,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:22:32,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864947287] [2022-11-16 11:22:32,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864947287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:32,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:32,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2022-11-16 11:22:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56730782] [2022-11-16 11:22:32,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:32,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:22:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:22:32,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:22:32,998 INFO L87 Difference]: Start difference. First operand 4554 states and 19706 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 11:22:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:40,671 INFO L93 Difference]: Finished difference Result 4825 states and 19777 transitions. [2022-11-16 11:22:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:22:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 16 [2022-11-16 11:22:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:40,684 INFO L225 Difference]: With dead ends: 4825 [2022-11-16 11:22:40,685 INFO L226 Difference]: Without dead ends: 4825 [2022-11-16 11:22:40,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:22:40,685 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 429 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:40,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 180 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-16 11:22:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2022-11-16 11:22:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4554. [2022-11-16 11:22:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4516 states have (on average 4.217227635075288) internal successors, (19045), 4553 states have internal predecessors, (19045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 19045 transitions. [2022-11-16 11:22:40,817 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 19045 transitions. Word has length 16 [2022-11-16 11:22:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:40,817 INFO L495 AbstractCegarLoop]: Abstraction has 4554 states and 19045 transitions. [2022-11-16 11:22:40,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 11:22:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 19045 transitions. [2022-11-16 11:22:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:22:40,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:40,818 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:40,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:41,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:41,019 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:41,019 INFO L85 PathProgramCache]: Analyzing trace with hash 34927619, now seen corresponding path program 4 times [2022-11-16 11:22:41,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:41,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38699642] [2022-11-16 11:22:41,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:22:41,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:41,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:41,021 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:41,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:41,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:22:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:22:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:41,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:22:41,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:22:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:42,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:22:42,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38699642] [2022-11-16 11:22:42,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38699642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:42,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:42,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2022-11-16 11:22:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134816377] [2022-11-16 11:22:42,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:22:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:22:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:22:42,841 INFO L87 Difference]: Start difference. First operand 4554 states and 19045 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 11:22:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:45,859 INFO L93 Difference]: Finished difference Result 4238 states and 16983 transitions. [2022-11-16 11:22:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:22:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 17 [2022-11-16 11:22:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:45,870 INFO L225 Difference]: With dead ends: 4238 [2022-11-16 11:22:45,870 INFO L226 Difference]: Without dead ends: 4208 [2022-11-16 11:22:45,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:22:45,871 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 226 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:45,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 67 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 429 Invalid, 0 Unknown, 562 Unchecked, 2.3s Time] [2022-11-16 11:22:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2022-11-16 11:22:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3970. [2022-11-16 11:22:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3938 states have (on average 4.131284916201118) internal successors, (16269), 3969 states have internal predecessors, (16269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 16269 transitions. [2022-11-16 11:22:45,946 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 16269 transitions. Word has length 17 [2022-11-16 11:22:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:45,947 INFO L495 AbstractCegarLoop]: Abstraction has 3970 states and 16269 transitions. [2022-11-16 11:22:45,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 11:22:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 16269 transitions. [2022-11-16 11:22:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:22:45,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:45,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:45,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:46,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:46,149 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash -180014506, now seen corresponding path program 1 times [2022-11-16 11:22:46,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:46,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086889546] [2022-11-16 11:22:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:46,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:46,151 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:46,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:22:46,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:22:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:46,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:22:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:47,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:22:48,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:48,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086889546] [2022-11-16 11:22:48,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086889546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:48,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:48,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:22:48,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391041169] [2022-11-16 11:22:48,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:48,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:22:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:22:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:22:48,727 INFO L87 Difference]: Start difference. First operand 3970 states and 16269 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 11:22:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:50,890 INFO L93 Difference]: Finished difference Result 5387 states and 22334 transitions. [2022-11-16 11:22:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:22:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:22:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:50,910 INFO L225 Difference]: With dead ends: 5387 [2022-11-16 11:22:50,910 INFO L226 Difference]: Without dead ends: 5387 [2022-11-16 11:22:50,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:22:50,910 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:50,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 35 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 64 Unchecked, 1.8s Time] [2022-11-16 11:22:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2022-11-16 11:22:51,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 4395. [2022-11-16 11:22:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4395 states, 4363 states have (on average 4.274810909924364) internal successors, (18651), 4394 states have internal predecessors, (18651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4395 states to 4395 states and 18651 transitions. [2022-11-16 11:22:51,031 INFO L78 Accepts]: Start accepts. Automaton has 4395 states and 18651 transitions. Word has length 17 [2022-11-16 11:22:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:51,031 INFO L495 AbstractCegarLoop]: Abstraction has 4395 states and 18651 transitions. [2022-11-16 11:22:51,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 11:22:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4395 states and 18651 transitions. [2022-11-16 11:22:51,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:22:51,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:51,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:51,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:51,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:51,234 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:51,234 INFO L85 PathProgramCache]: Analyzing trace with hash -180016366, now seen corresponding path program 2 times [2022-11-16 11:22:51,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:51,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101086595] [2022-11-16 11:22:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:51,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:51,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:51,236 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:51,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:51,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:51,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:51,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:22:51,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:51,769 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:22:51,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:22:51,985 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:22:51,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:22:52,138 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:22:52,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:22:52,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:22:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:22:52,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:52,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:52,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101086595] [2022-11-16 11:22:52,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101086595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:52,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:52,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:22:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058165526] [2022-11-16 11:22:52,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:52,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:22:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:52,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:22:52,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:22:52,609 INFO L87 Difference]: Start difference. First operand 4395 states and 18651 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:52,861 INFO L93 Difference]: Finished difference Result 4381 states and 18563 transitions. [2022-11-16 11:22:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:22:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:22:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:52,874 INFO L225 Difference]: With dead ends: 4381 [2022-11-16 11:22:52,874 INFO L226 Difference]: Without dead ends: 4381 [2022-11-16 11:22:52,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:22:52,874 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:52,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-16 11:22:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2022-11-16 11:22:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 4381. [2022-11-16 11:22:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4349 states have (on average 4.268337548861807) internal successors, (18563), 4380 states have internal predecessors, (18563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 18563 transitions. [2022-11-16 11:22:52,981 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 18563 transitions. Word has length 17 [2022-11-16 11:22:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:52,981 INFO L495 AbstractCegarLoop]: Abstraction has 4381 states and 18563 transitions. [2022-11-16 11:22:52,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:22:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 18563 transitions. [2022-11-16 11:22:52,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:22:52,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:52,982 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:52,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:22:53,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:53,183 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:22:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash 33080577, now seen corresponding path program 2 times [2022-11-16 11:22:53,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:22:53,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692371079] [2022-11-16 11:22:53,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:53,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:22:53,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:22:53,185 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:22:53,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:22:53,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:22:53,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:22:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:53,851 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:22:53,851 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:22:54,059 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:22:54,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:22:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:22:54,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:22:54,350 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:22:54,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:22:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:22:55,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:22:58,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:22:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692371079] [2022-11-16 11:22:58,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692371079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:58,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:22:58,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:22:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446178565] [2022-11-16 11:22:58,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:58,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:22:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:22:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:22:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:22:58,097 INFO L87 Difference]: Start difference. First operand 4381 states and 18563 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:04,934 INFO L93 Difference]: Finished difference Result 5042 states and 21108 transitions. [2022-11-16 11:23:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:23:04,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:23:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:04,952 INFO L225 Difference]: With dead ends: 5042 [2022-11-16 11:23:04,952 INFO L226 Difference]: Without dead ends: 5042 [2022-11-16 11:23:04,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:23:04,952 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 133 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:04,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 115 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 505 Invalid, 0 Unknown, 436 Unchecked, 4.3s Time] [2022-11-16 11:23:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5042 states. [2022-11-16 11:23:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 4587. [2022-11-16 11:23:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4555 states have (on average 4.305378704720088) internal successors, (19611), 4586 states have internal predecessors, (19611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19611 transitions. [2022-11-16 11:23:05,039 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19611 transitions. Word has length 17 [2022-11-16 11:23:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:05,039 INFO L495 AbstractCegarLoop]: Abstraction has 4587 states and 19611 transitions. [2022-11-16 11:23:05,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19611 transitions. [2022-11-16 11:23:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:23:05,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:05,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:05,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:23:05,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:05,241 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash -22512465, now seen corresponding path program 1 times [2022-11-16 11:23:05,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:05,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635257310] [2022-11-16 11:23:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:05,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:05,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:05,243 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:05,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:23:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:23:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:05,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:06,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:07,737 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:07,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635257310] [2022-11-16 11:23:07,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635257310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:07,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:07,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:23:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764068361] [2022-11-16 11:23:07,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:07,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:23:07,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:23:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:07,739 INFO L87 Difference]: Start difference. First operand 4587 states and 19611 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 11:23:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:10,550 INFO L93 Difference]: Finished difference Result 5609 states and 24027 transitions. [2022-11-16 11:23:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:23:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:23:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:10,566 INFO L225 Difference]: With dead ends: 5609 [2022-11-16 11:23:10,566 INFO L226 Difference]: Without dead ends: 5609 [2022-11-16 11:23:10,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:23:10,567 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:10,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 42 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 230 Unchecked, 2.4s Time] [2022-11-16 11:23:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5609 states. [2022-11-16 11:23:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5609 to 5035. [2022-11-16 11:23:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5003 states have (on average 4.381171297221667) internal successors, (21919), 5034 states have internal predecessors, (21919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 21919 transitions. [2022-11-16 11:23:10,656 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 21919 transitions. Word has length 17 [2022-11-16 11:23:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:10,657 INFO L495 AbstractCegarLoop]: Abstraction has 5035 states and 21919 transitions. [2022-11-16 11:23:10,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 11:23:10,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 21919 transitions. [2022-11-16 11:23:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:23:10,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:10,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:10,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:23:10,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:10,859 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1497148097, now seen corresponding path program 2 times [2022-11-16 11:23:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:10,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934365758] [2022-11-16 11:23:10,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:10,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:10,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:10,861 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:10,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -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 11:23:11,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:11,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:11,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:23:11,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:23:11,636 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:23:11,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:23:11,807 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:23:11,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:23:11,838 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:23:11,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:23:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:23:12,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:12,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:12,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934365758] [2022-11-16 11:23:12,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934365758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:12,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:12,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:23:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352539023] [2022-11-16 11:23:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:12,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:23:12,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:23:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:23:12,270 INFO L87 Difference]: Start difference. First operand 5035 states and 21919 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:12,529 INFO L93 Difference]: Finished difference Result 5023 states and 21835 transitions. [2022-11-16 11:23:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:23:12,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:23:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:12,543 INFO L225 Difference]: With dead ends: 5023 [2022-11-16 11:23:12,543 INFO L226 Difference]: Without dead ends: 5023 [2022-11-16 11:23:12,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:23:12,544 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:12,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-16 11:23:12,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5023 states. [2022-11-16 11:23:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5023 to 4999. [2022-11-16 11:23:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 4967 states have (on average 4.3734648681296555) internal successors, (21723), 4998 states have internal predecessors, (21723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 21723 transitions. [2022-11-16 11:23:12,632 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 21723 transitions. Word has length 17 [2022-11-16 11:23:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:12,632 INFO L495 AbstractCegarLoop]: Abstraction has 4999 states and 21723 transitions. [2022-11-16 11:23:12,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 21723 transitions. [2022-11-16 11:23:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:23:12,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:12,635 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:12,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:12,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:12,836 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:12,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1568231836, now seen corresponding path program 3 times [2022-11-16 11:23:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:12,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16046286] [2022-11-16 11:23:12,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:23:12,837 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 11:23:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:12,838 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:12,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-16 11:23:13,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:23:13,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:13,465 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:23:13,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:23:13,687 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:23:13,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:23:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:23:13,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:23:13,930 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:23:13,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:23:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:23:14,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:23:15,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:15,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16046286] [2022-11-16 11:23:15,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16046286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:15,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:15,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:23:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852911113] [2022-11-16 11:23:15,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:15,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:23:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:23:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:15,833 INFO L87 Difference]: Start difference. First operand 4999 states and 21723 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:18,396 INFO L93 Difference]: Finished difference Result 5538 states and 23448 transitions. [2022-11-16 11:23:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:23:18,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:23:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:18,414 INFO L225 Difference]: With dead ends: 5538 [2022-11-16 11:23:18,414 INFO L226 Difference]: Without dead ends: 5538 [2022-11-16 11:23:18,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:23:18,415 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:18,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 49 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 301 Unchecked, 2.2s Time] [2022-11-16 11:23:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5538 states. [2022-11-16 11:23:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5538 to 5035. [2022-11-16 11:23:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5003 states have (on average 4.3371976813911655) internal successors, (21699), 5034 states have internal predecessors, (21699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:18,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 21699 transitions. [2022-11-16 11:23:18,512 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 21699 transitions. Word has length 17 [2022-11-16 11:23:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:18,512 INFO L495 AbstractCegarLoop]: Abstraction has 5035 states and 21699 transitions. [2022-11-16 11:23:18,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 21699 transitions. [2022-11-16 11:23:18,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:18,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:18,515 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:18,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:18,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:18,715 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1285476603, now seen corresponding path program 1 times [2022-11-16 11:23:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:18,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551136111] [2022-11-16 11:23:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:18,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:18,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:18,717 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:18,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-16 11:23:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:19,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:23:19,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:19,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:19,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:23:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:23:20,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:20,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551136111] [2022-11-16 11:23:20,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551136111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:20,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:20,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-11-16 11:23:20,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223027445] [2022-11-16 11:23:20,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:20,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:23:20,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:23:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:23:20,644 INFO L87 Difference]: Start difference. First operand 5035 states and 21699 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:22,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:22,147 INFO L93 Difference]: Finished difference Result 5014 states and 21356 transitions. [2022-11-16 11:23:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:23:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:22,162 INFO L225 Difference]: With dead ends: 5014 [2022-11-16 11:23:22,162 INFO L226 Difference]: Without dead ends: 5014 [2022-11-16 11:23:22,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:23:22,163 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:22,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 64 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 141 Unchecked, 1.3s Time] [2022-11-16 11:23:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2022-11-16 11:23:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 4842. [2022-11-16 11:23:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4842 states, 4810 states have (on average 4.312681912681913) internal successors, (20744), 4841 states have internal predecessors, (20744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 20744 transitions. [2022-11-16 11:23:22,248 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 20744 transitions. Word has length 18 [2022-11-16 11:23:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:22,249 INFO L495 AbstractCegarLoop]: Abstraction has 4842 states and 20744 transitions. [2022-11-16 11:23:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 20744 transitions. [2022-11-16 11:23:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:22,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:22,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:22,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-16 11:23:22,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:22,454 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash 681843014, now seen corresponding path program 1 times [2022-11-16 11:23:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116264081] [2022-11-16 11:23:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:22,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:22,456 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:22,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-16 11:23:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:22,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:23:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:22,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:23:23,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:23:25,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:25,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116264081] [2022-11-16 11:23:25,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116264081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:25,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:25,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:23:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010114395] [2022-11-16 11:23:25,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:25,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:23:25,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:23:25,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:25,104 INFO L87 Difference]: Start difference. First operand 4842 states and 20744 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:26,845 INFO L93 Difference]: Finished difference Result 5054 states and 21695 transitions. [2022-11-16 11:23:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:23:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:26,860 INFO L225 Difference]: With dead ends: 5054 [2022-11-16 11:23:26,860 INFO L226 Difference]: Without dead ends: 5054 [2022-11-16 11:23:26,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:23:26,860 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:26,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 144 Unchecked, 1.2s Time] [2022-11-16 11:23:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2022-11-16 11:23:26,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 4975. [2022-11-16 11:23:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4943 states have (on average 4.341493020432935) internal successors, (21460), 4974 states have internal predecessors, (21460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 21460 transitions. [2022-11-16 11:23:26,953 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 21460 transitions. Word has length 18 [2022-11-16 11:23:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:26,954 INFO L495 AbstractCegarLoop]: Abstraction has 4975 states and 21460 transitions. [2022-11-16 11:23:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 21460 transitions. [2022-11-16 11:23:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:26,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:26,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:26,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-16 11:23:27,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:27,156 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash 681858142, now seen corresponding path program 1 times [2022-11-16 11:23:27,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:27,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935234049] [2022-11-16 11:23:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:27,157 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 11:23:27,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:27,158 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:27,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-16 11:23:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:27,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:23:27,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:27,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:28,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:29,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935234049] [2022-11-16 11:23:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935234049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:29,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:29,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:23:29,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299363123] [2022-11-16 11:23:29,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:29,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:23:29,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:23:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:29,872 INFO L87 Difference]: Start difference. First operand 4975 states and 21460 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:32,273 INFO L93 Difference]: Finished difference Result 7631 states and 35258 transitions. [2022-11-16 11:23:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:23:32,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:32,297 INFO L225 Difference]: With dead ends: 7631 [2022-11-16 11:23:32,297 INFO L226 Difference]: Without dead ends: 7631 [2022-11-16 11:23:32,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:23:32,298 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:32,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 34 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 115 Unchecked, 2.0s Time] [2022-11-16 11:23:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2022-11-16 11:23:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 5666. [2022-11-16 11:23:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5666 states, 5634 states have (on average 4.650869719559815) internal successors, (26203), 5665 states have internal predecessors, (26203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 26203 transitions. [2022-11-16 11:23:32,467 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 26203 transitions. Word has length 18 [2022-11-16 11:23:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:32,468 INFO L495 AbstractCegarLoop]: Abstraction has 5666 states and 26203 transitions. [2022-11-16 11:23:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 26203 transitions. [2022-11-16 11:23:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:32,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:32,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:32,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:32,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:32,670 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:32,671 INFO L85 PathProgramCache]: Analyzing trace with hash 681179924, now seen corresponding path program 2 times [2022-11-16 11:23:32,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:32,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861177461] [2022-11-16 11:23:32,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:32,672 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 11:23:32,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:32,672 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:32,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-16 11:23:32,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:32,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:32,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:33,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:33,237 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:23:33,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:23:33,469 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:23:33,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:23:33,604 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:23:33,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:23:33,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:23:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:23:34,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:34,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:34,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861177461] [2022-11-16 11:23:34,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861177461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:34,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:34,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:23:34,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609490912] [2022-11-16 11:23:34,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:34,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:23:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:23:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:23:34,084 INFO L87 Difference]: Start difference. First operand 5666 states and 26203 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:34,394 INFO L93 Difference]: Finished difference Result 5663 states and 26191 transitions. [2022-11-16 11:23:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:23:34,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:34,411 INFO L225 Difference]: With dead ends: 5663 [2022-11-16 11:23:34,411 INFO L226 Difference]: Without dead ends: 5663 [2022-11-16 11:23:34,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:23:34,412 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:34,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-16 11:23:34,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5663 states. [2022-11-16 11:23:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5663 to 5602. [2022-11-16 11:23:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5570 states have (on average 4.64165170556553) internal successors, (25854), 5601 states have internal predecessors, (25854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 25854 transitions. [2022-11-16 11:23:34,516 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 25854 transitions. Word has length 18 [2022-11-16 11:23:34,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:34,516 INFO L495 AbstractCegarLoop]: Abstraction has 5602 states and 25854 transitions. [2022-11-16 11:23:34,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 25854 transitions. [2022-11-16 11:23:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:34,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:34,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:34,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:34,719 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 681800482, now seen corresponding path program 2 times [2022-11-16 11:23:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:34,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881911204] [2022-11-16 11:23:34,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:34,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:34,721 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:34,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-16 11:23:35,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:35,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:35,305 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:23:35,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:23:35,529 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:23:35,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:23:35,630 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:23:35,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:23:35,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:23:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:23:36,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:36,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:36,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881911204] [2022-11-16 11:23:36,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881911204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:36,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:36,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:23:36,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712091866] [2022-11-16 11:23:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:36,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:23:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:23:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:23:36,103 INFO L87 Difference]: Start difference. First operand 5602 states and 25854 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:36,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:36,331 INFO L93 Difference]: Finished difference Result 5574 states and 25626 transitions. [2022-11-16 11:23:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:23:36,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:36,348 INFO L225 Difference]: With dead ends: 5574 [2022-11-16 11:23:36,349 INFO L226 Difference]: Without dead ends: 5574 [2022-11-16 11:23:36,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:23:36,349 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:36,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-16 11:23:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2022-11-16 11:23:36,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 5574. [2022-11-16 11:23:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5574 states, 5542 states have (on average 4.623962468422952) internal successors, (25626), 5573 states have internal predecessors, (25626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 25626 transitions. [2022-11-16 11:23:36,501 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 25626 transitions. Word has length 18 [2022-11-16 11:23:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:36,501 INFO L495 AbstractCegarLoop]: Abstraction has 5574 states and 25626 transitions. [2022-11-16 11:23:36,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 25626 transitions. [2022-11-16 11:23:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:36,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:36,503 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:36,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:36,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:36,704 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash -692247246, now seen corresponding path program 4 times [2022-11-16 11:23:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:36,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308890050] [2022-11-16 11:23:36,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:23:36,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:36,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:36,706 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:36,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-16 11:23:37,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:23:37,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:23:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:37,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:37,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:23:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:23:38,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308890050] [2022-11-16 11:23:38,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308890050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:38,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:38,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2022-11-16 11:23:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263535003] [2022-11-16 11:23:38,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:38,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:23:38,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:23:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:23:38,647 INFO L87 Difference]: Start difference. First operand 5574 states and 25626 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 11:23:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:41,372 INFO L93 Difference]: Finished difference Result 5706 states and 25969 transitions. [2022-11-16 11:23:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:23:41,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 18 [2022-11-16 11:23:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:41,391 INFO L225 Difference]: With dead ends: 5706 [2022-11-16 11:23:41,391 INFO L226 Difference]: Without dead ends: 5706 [2022-11-16 11:23:41,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:23:41,391 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:41,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 63 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 346 Unchecked, 2.0s Time] [2022-11-16 11:23:41,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2022-11-16 11:23:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 5568. [2022-11-16 11:23:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5568 states, 5536 states have (on average 4.624277456647399) internal successors, (25600), 5567 states have internal predecessors, (25600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5568 states to 5568 states and 25600 transitions. [2022-11-16 11:23:41,518 INFO L78 Accepts]: Start accepts. Automaton has 5568 states and 25600 transitions. Word has length 18 [2022-11-16 11:23:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:41,519 INFO L495 AbstractCegarLoop]: Abstraction has 5568 states and 25600 transitions. [2022-11-16 11:23:41,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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 11:23:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5568 states and 25600 transitions. [2022-11-16 11:23:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:41,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:41,522 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:41,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:41,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:41,738 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:41,739 INFO L85 PathProgramCache]: Analyzing trace with hash -864945673, now seen corresponding path program 1 times [2022-11-16 11:23:41,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:41,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067417362] [2022-11-16 11:23:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:41,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:41,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:41,740 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:41,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-16 11:23:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:42,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:23:42,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:42,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:42,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:23:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:23:43,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:43,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:43,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067417362] [2022-11-16 11:23:43,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067417362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:43,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:43,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-11-16 11:23:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994653452] [2022-11-16 11:23:43,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:43,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:23:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:23:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:23:43,740 INFO L87 Difference]: Start difference. First operand 5568 states and 25600 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:45,342 INFO L93 Difference]: Finished difference Result 5770 states and 26309 transitions. [2022-11-16 11:23:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:23:45,344 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:45,360 INFO L225 Difference]: With dead ends: 5770 [2022-11-16 11:23:45,360 INFO L226 Difference]: Without dead ends: 5770 [2022-11-16 11:23:45,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:23:45,361 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:45,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 63 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 93 Unchecked, 1.4s Time] [2022-11-16 11:23:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2022-11-16 11:23:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 5558. [2022-11-16 11:23:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 5526 states have (on average 4.623959464350344) internal successors, (25552), 5557 states have internal predecessors, (25552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 25552 transitions. [2022-11-16 11:23:45,472 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 25552 transitions. Word has length 18 [2022-11-16 11:23:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:45,473 INFO L495 AbstractCegarLoop]: Abstraction has 5558 states and 25552 transitions. [2022-11-16 11:23:45,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 25552 transitions. [2022-11-16 11:23:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:45,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:45,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:45,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:45,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:45,675 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash -633500707, now seen corresponding path program 1 times [2022-11-16 11:23:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:45,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328628499] [2022-11-16 11:23:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:23:45,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:45,677 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:45,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-16 11:23:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:23:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:23:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:46,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:46,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:23:48,315 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328628499] [2022-11-16 11:23:48,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328628499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:48,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:48,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:23:48,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521724468] [2022-11-16 11:23:48,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:48,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:23:48,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:23:48,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:23:48,318 INFO L87 Difference]: Start difference. First operand 5558 states and 25552 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:49,853 INFO L93 Difference]: Finished difference Result 5868 states and 27048 transitions. [2022-11-16 11:23:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:23:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:49,873 INFO L225 Difference]: With dead ends: 5868 [2022-11-16 11:23:49,873 INFO L226 Difference]: Without dead ends: 5868 [2022-11-16 11:23:49,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:23:49,874 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:49,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 83 Unchecked, 1.2s Time] [2022-11-16 11:23:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2022-11-16 11:23:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5632. [2022-11-16 11:23:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5632 states, 5600 states have (on average 4.638928571428571) internal successors, (25978), 5631 states have internal predecessors, (25978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5632 states to 5632 states and 25978 transitions. [2022-11-16 11:23:49,989 INFO L78 Accepts]: Start accepts. Automaton has 5632 states and 25978 transitions. Word has length 18 [2022-11-16 11:23:49,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:49,989 INFO L495 AbstractCegarLoop]: Abstraction has 5632 states and 25978 transitions. [2022-11-16 11:23:49,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5632 states and 25978 transitions. [2022-11-16 11:23:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:49,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:49,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:50,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-16 11:23:50,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:50,192 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash -633508147, now seen corresponding path program 2 times [2022-11-16 11:23:50,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:50,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309897700] [2022-11-16 11:23:50,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:23:50,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:50,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:50,194 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:50,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-16 11:23:50,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:23:50,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:50,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:23:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:50,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:23:50,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:23:51,002 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:23:51,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:23:51,153 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:23:51,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:23:51,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:23:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:23:51,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:23:51,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:51,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309897700] [2022-11-16 11:23:51,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309897700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:23:51,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:23:51,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:23:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589697968] [2022-11-16 11:23:51,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:23:51,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:23:51,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:23:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:23:51,644 INFO L87 Difference]: Start difference. First operand 5632 states and 25978 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:23:51,867 INFO L93 Difference]: Finished difference Result 5626 states and 25930 transitions. [2022-11-16 11:23:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:23:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:23:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:23:51,884 INFO L225 Difference]: With dead ends: 5626 [2022-11-16 11:23:51,884 INFO L226 Difference]: Without dead ends: 5626 [2022-11-16 11:23:51,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:23:51,885 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:23:51,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-16 11:23:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2022-11-16 11:23:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 5622. [2022-11-16 11:23:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5622 states, 5590 states have (on average 4.633631484794275) internal successors, (25902), 5621 states have internal predecessors, (25902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5622 states to 5622 states and 25902 transitions. [2022-11-16 11:23:52,008 INFO L78 Accepts]: Start accepts. Automaton has 5622 states and 25902 transitions. Word has length 18 [2022-11-16 11:23:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:23:52,008 INFO L495 AbstractCegarLoop]: Abstraction has 5622 states and 25902 transitions. [2022-11-16 11:23:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:23:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5622 states and 25902 transitions. [2022-11-16 11:23:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:23:52,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:23:52,010 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:23:52,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-16 11:23:52,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:52,211 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:23:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:23:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash -629603710, now seen corresponding path program 5 times [2022-11-16 11:23:52,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:23:52,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902344410] [2022-11-16 11:23:52,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:23:52,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:23:52,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:23:52,212 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:23:52,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-16 11:23:52,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:23:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:23:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:23:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:23:52,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:23:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:23:53,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:23:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:23:54,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:23:54,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902344410] [2022-11-16 11:23:54,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902344410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:23:54,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:23:54,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-16 11:23:54,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399296368] [2022-11-16 11:23:54,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:23:54,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:23:54,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:23:54,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:23:54,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:23:54,499 INFO L87 Difference]: Start difference. First operand 5622 states and 25902 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:02,074 INFO L93 Difference]: Finished difference Result 9344 states and 41187 transitions. [2022-11-16 11:24:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:24:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:24:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:02,107 INFO L225 Difference]: With dead ends: 9344 [2022-11-16 11:24:02,107 INFO L226 Difference]: Without dead ends: 9344 [2022-11-16 11:24:02,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:24:02,108 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 154 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 878 Invalid, 0 Unknown, 252 Unchecked, 5.7s Time] [2022-11-16 11:24:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2022-11-16 11:24:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 7805. [2022-11-16 11:24:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7805 states, 7773 states have (on average 4.757622539560016) internal successors, (36981), 7804 states have internal predecessors, (36981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7805 states to 7805 states and 36981 transitions. [2022-11-16 11:24:02,380 INFO L78 Accepts]: Start accepts. Automaton has 7805 states and 36981 transitions. Word has length 18 [2022-11-16 11:24:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:02,380 INFO L495 AbstractCegarLoop]: Abstraction has 7805 states and 36981 transitions. [2022-11-16 11:24:02,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7805 states and 36981 transitions. [2022-11-16 11:24:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:24:02,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:02,383 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:24:02,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:02,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:02,583 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:24:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash -802302137, now seen corresponding path program 2 times [2022-11-16 11:24:02,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:02,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557326128] [2022-11-16 11:24:02,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:24:02,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:02,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:02,585 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:24:02,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-16 11:24:03,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:24:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:03,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:24:03,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:03,321 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:24:03,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:24:03,566 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:24:03,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:24:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:24:03,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:24:03,814 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:24:03,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:24:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:24:04,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:24:07,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557326128] [2022-11-16 11:24:07,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557326128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:07,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:24:07,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 11:24:07,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539493751] [2022-11-16 11:24:07,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:07,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:24:07,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:07,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:24:07,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:24:07,273 INFO L87 Difference]: Start difference. First operand 7805 states and 36981 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:24:13,212 INFO L93 Difference]: Finished difference Result 12120 states and 54996 transitions. [2022-11-16 11:24:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:24:13,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:24:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:24:13,254 INFO L225 Difference]: With dead ends: 12120 [2022-11-16 11:24:13,254 INFO L226 Difference]: Without dead ends: 12120 [2022-11-16 11:24:13,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:24:13,255 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 276 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:24:13,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 157 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 556 Invalid, 0 Unknown, 836 Unchecked, 5.6s Time] [2022-11-16 11:24:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12120 states. [2022-11-16 11:24:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12120 to 9634. [2022-11-16 11:24:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9634 states, 9602 states have (on average 4.873359716725682) internal successors, (46794), 9633 states have internal predecessors, (46794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 46794 transitions. [2022-11-16 11:24:13,550 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 46794 transitions. Word has length 18 [2022-11-16 11:24:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:24:13,551 INFO L495 AbstractCegarLoop]: Abstraction has 9634 states and 46794 transitions. [2022-11-16 11:24:13,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:24:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 46794 transitions. [2022-11-16 11:24:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:24:13,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:24:13,553 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 1, 1, 1] [2022-11-16 11:24:13,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-16 11:24:13,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:13,754 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:24:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:24:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash -639329643, now seen corresponding path program 2 times [2022-11-16 11:24:13,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:24:13,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837939162] [2022-11-16 11:24:13,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:24:13,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:24:13,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:24:13,756 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:24:13,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-16 11:24:14,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:24:14,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:24:14,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:24:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:24:14,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:24:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:24:15,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:24:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:24:20,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:24:20,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837939162] [2022-11-16 11:24:20,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837939162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:24:20,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:24:20,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 30 [2022-11-16 11:24:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469621328] [2022-11-16 11:24:20,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:24:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:24:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:24:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:24:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:24:20,179 INFO L87 Difference]: Start difference. First operand 9634 states and 46794 transitions. Second operand has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:19,366 INFO L93 Difference]: Finished difference Result 44613 states and 218422 transitions. [2022-11-16 11:25:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 11:25:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:25:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:19,571 INFO L225 Difference]: With dead ends: 44613 [2022-11-16 11:25:19,572 INFO L226 Difference]: Without dead ends: 44613 [2022-11-16 11:25:19,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=447, Invalid=2309, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:25:19,572 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 902 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 4639 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 5541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 4639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 792 IncrementalHoareTripleChecker+Unchecked, 40.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:19,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 573 Invalid, 5541 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [110 Valid, 4639 Invalid, 0 Unknown, 792 Unchecked, 40.1s Time] [2022-11-16 11:25:19,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44613 states. [2022-11-16 11:25:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44613 to 9114. [2022-11-16 11:25:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9114 states, 9082 states have (on average 4.901453424355869) internal successors, (44515), 9113 states have internal predecessors, (44515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9114 states to 9114 states and 44515 transitions. [2022-11-16 11:25:20,428 INFO L78 Accepts]: Start accepts. Automaton has 9114 states and 44515 transitions. Word has length 18 [2022-11-16 11:25:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:20,428 INFO L495 AbstractCegarLoop]: Abstraction has 9114 states and 44515 transitions. [2022-11-16 11:25:20,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9114 states and 44515 transitions. [2022-11-16 11:25:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:25:20,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:20,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:20,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-16 11:25:20,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:20,631 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:25:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1370610107, now seen corresponding path program 6 times [2022-11-16 11:25:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027928912] [2022-11-16 11:25:20,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:25:20,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:20,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:20,633 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:25:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-16 11:25:21,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:25:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:21,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:25:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:21,405 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:25:21,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:25:21,641 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:25:21,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:25:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:21,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:25:21,829 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:25:21,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:25:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:25:22,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:25:24,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027928912] [2022-11-16 11:25:24,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027928912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:24,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:25:24,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:25:24,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063648477] [2022-11-16 11:25:24,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:24,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:25:24,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:25:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:25:24,311 INFO L87 Difference]: Start difference. First operand 9114 states and 44515 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:26,789 INFO L93 Difference]: Finished difference Result 9531 states and 45979 transitions. [2022-11-16 11:25:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:25:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:25:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:26,825 INFO L225 Difference]: With dead ends: 9531 [2022-11-16 11:25:26,825 INFO L226 Difference]: Without dead ends: 9531 [2022-11-16 11:25:26,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:25:26,826 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:26,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 96 Unchecked, 1.7s Time] [2022-11-16 11:25:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2022-11-16 11:25:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 9128. [2022-11-16 11:25:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9128 states, 9096 states have (on average 4.891490765171504) internal successors, (44493), 9127 states have internal predecessors, (44493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9128 states to 9128 states and 44493 transitions. [2022-11-16 11:25:27,088 INFO L78 Accepts]: Start accepts. Automaton has 9128 states and 44493 transitions. Word has length 18 [2022-11-16 11:25:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:27,089 INFO L495 AbstractCegarLoop]: Abstraction has 9128 states and 44493 transitions. [2022-11-16 11:25:27,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 9128 states and 44493 transitions. [2022-11-16 11:25:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:25:27,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:27,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:27,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:27,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:27,292 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:25:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1363676554, now seen corresponding path program 2 times [2022-11-16 11:25:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:27,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527544574] [2022-11-16 11:25:27,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:27,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:27,294 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:25:27,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-16 11:25:27,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:25:27,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:25:27,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:28,021 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:25:28,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 11:25:28,241 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:25:28,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:25:28,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:28,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:25:28,461 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:25:28,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:25:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:25:28,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:25:31,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:31,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527544574] [2022-11-16 11:25:31,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527544574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:31,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:25:31,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:25:31,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988582648] [2022-11-16 11:25:31,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:31,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:25:31,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:25:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:25:31,655 INFO L87 Difference]: Start difference. First operand 9128 states and 44493 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:36,537 INFO L93 Difference]: Finished difference Result 10830 states and 49379 transitions. [2022-11-16 11:25:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:25:36,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:25:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:36,574 INFO L225 Difference]: With dead ends: 10830 [2022-11-16 11:25:36,574 INFO L226 Difference]: Without dead ends: 10830 [2022-11-16 11:25:36,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:25:36,574 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:36,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 104 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 672 Invalid, 0 Unknown, 355 Unchecked, 4.3s Time] [2022-11-16 11:25:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10830 states. [2022-11-16 11:25:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10830 to 8804. [2022-11-16 11:25:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8804 states, 8772 states have (on average 4.701892384860921) internal successors, (41245), 8803 states have internal predecessors, (41245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8804 states to 8804 states and 41245 transitions. [2022-11-16 11:25:36,852 INFO L78 Accepts]: Start accepts. Automaton has 8804 states and 41245 transitions. Word has length 18 [2022-11-16 11:25:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:36,852 INFO L495 AbstractCegarLoop]: Abstraction has 8804 states and 41245 transitions. [2022-11-16 11:25:36,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 8804 states and 41245 transitions. [2022-11-16 11:25:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:25:36,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:36,855 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:36,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:37,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:37,056 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:25:37,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:37,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1368763127, now seen corresponding path program 7 times [2022-11-16 11:25:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:37,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077298944] [2022-11-16 11:25:37,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:25:37,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:37,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:37,058 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:25:37,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-16 11:25:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:25:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:37,832 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:25:37,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:25:38,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-11-16 11:25:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:25:38,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:25:40,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:40,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077298944] [2022-11-16 11:25:40,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077298944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:40,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:25:40,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-16 11:25:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890738577] [2022-11-16 11:25:40,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:40,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:25:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:25:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:25:40,070 INFO L87 Difference]: Start difference. First operand 8804 states and 41245 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:43,611 INFO L93 Difference]: Finished difference Result 15236 states and 67002 transitions. [2022-11-16 11:25:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:25:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:25:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:43,664 INFO L225 Difference]: With dead ends: 15236 [2022-11-16 11:25:43,664 INFO L226 Difference]: Without dead ends: 15236 [2022-11-16 11:25:43,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:25:43,665 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:43,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 90 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 336 Invalid, 0 Unknown, 474 Unchecked, 2.7s Time] [2022-11-16 11:25:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15236 states. [2022-11-16 11:25:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15236 to 9936. [2022-11-16 11:25:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9936 states, 9904 states have (on average 4.79361873990307) internal successors, (47476), 9935 states have internal predecessors, (47476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9936 states to 9936 states and 47476 transitions. [2022-11-16 11:25:44,012 INFO L78 Accepts]: Start accepts. Automaton has 9936 states and 47476 transitions. Word has length 18 [2022-11-16 11:25:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:44,012 INFO L495 AbstractCegarLoop]: Abstraction has 9936 states and 47476 transitions. [2022-11-16 11:25:44,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9936 states and 47476 transitions. [2022-11-16 11:25:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:25:44,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:44,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:44,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:44,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:44,215 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:25:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1214211592, now seen corresponding path program 3 times [2022-11-16 11:25:44,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:44,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114026933] [2022-11-16 11:25:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:25:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:44,217 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:25:44,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-16 11:25:44,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:25:44,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:44,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:25:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:44,962 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:25:44,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:25:45,208 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:25:45,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:25:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:25:45,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:25:45,464 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:25:45,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:25:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:25:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:25:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:25:51,995 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:51,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114026933] [2022-11-16 11:25:51,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114026933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:25:51,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:25:51,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:25:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893012241] [2022-11-16 11:25:51,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:25:51,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:25:51,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:25:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:25:51,998 INFO L87 Difference]: Start difference. First operand 9936 states and 47476 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:25:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:56,391 INFO L93 Difference]: Finished difference Result 11295 states and 53381 transitions. [2022-11-16 11:25:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:25:56,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:25:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:56,434 INFO L225 Difference]: With dead ends: 11295 [2022-11-16 11:25:56,434 INFO L226 Difference]: Without dead ends: 11295 [2022-11-16 11:25:56,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:25:56,434 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 206 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:56,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 30 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 290 Invalid, 0 Unknown, 3 Unchecked, 3.3s Time] [2022-11-16 11:25:56,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2022-11-16 11:25:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 8915. [2022-11-16 11:25:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8915 states, 8893 states have (on average 4.765321039019454) internal successors, (42378), 8914 states have internal predecessors, (42378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8915 states to 8915 states and 42378 transitions. [2022-11-16 11:25:56,694 INFO L78 Accepts]: Start accepts. Automaton has 8915 states and 42378 transitions. Word has length 18 [2022-11-16 11:25:56,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:56,695 INFO L495 AbstractCegarLoop]: Abstraction has 8915 states and 42378 transitions. [2022-11-16 11:25:56,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 11:25:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 8915 states and 42378 transitions. [2022-11-16 11:25:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:25:56,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:56,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:56,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-16 11:25:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:56,897 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:25:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1214211590, now seen corresponding path program 2 times [2022-11-16 11:25:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:56,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399348231] [2022-11-16 11:25:56,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:25:56,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:56,900 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:25:56,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-16 11:25:57,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:25:57,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:25:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:25:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:25:57,529 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:25:57,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:25:57,769 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:25:57,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:25:57,948 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:25:57,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:25:57,980 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:25:57,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:25:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:25:58,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:25:58,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:25:58,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399348231] [2022-11-16 11:25:58,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399348231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:58,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:58,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:25:58,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13588096] [2022-11-16 11:25:58,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:58,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:25:58,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:25:58,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:25:58,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:25:58,495 INFO L87 Difference]: Start difference. First operand 8915 states and 42378 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:25:58,784 INFO L93 Difference]: Finished difference Result 8881 states and 42226 transitions. [2022-11-16 11:25:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:25:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:25:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:25:58,815 INFO L225 Difference]: With dead ends: 8881 [2022-11-16 11:25:58,815 INFO L226 Difference]: Without dead ends: 8881 [2022-11-16 11:25:58,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:25:58,815 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:25:58,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-16 11:25:58,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8881 states. [2022-11-16 11:25:58,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8881 to 8881. [2022-11-16 11:25:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8881 states, 8859 states have (on average 4.7664521955073935) internal successors, (42226), 8880 states have internal predecessors, (42226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8881 states to 8881 states and 42226 transitions. [2022-11-16 11:25:59,016 INFO L78 Accepts]: Start accepts. Automaton has 8881 states and 42226 transitions. Word has length 18 [2022-11-16 11:25:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:25:59,017 INFO L495 AbstractCegarLoop]: Abstraction has 8881 states and 42226 transitions. [2022-11-16 11:25:59,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:25:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 8881 states and 42226 transitions. [2022-11-16 11:25:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:25:59,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:25:59,019 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:25:59,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-16 11:25:59,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:59,220 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:25:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2088912745, now seen corresponding path program 5 times [2022-11-16 11:25:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:25:59,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622933743] [2022-11-16 11:25:59,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:25:59,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:25:59,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:25:59,222 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:25:59,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-16 11:26:00,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:26:00,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:00,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:26:00,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:26:00,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:26:02,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:02,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622933743] [2022-11-16 11:26:02,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622933743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:02,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:26:02,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-11-16 11:26:02,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061002716] [2022-11-16 11:26:02,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:26:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:02,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:26:02,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:26:02,081 INFO L87 Difference]: Start difference. First operand 8881 states and 42226 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 11:26:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:15,622 INFO L93 Difference]: Finished difference Result 10861 states and 47925 transitions. [2022-11-16 11:26:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 11:26:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 18 [2022-11-16 11:26:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:15,668 INFO L225 Difference]: With dead ends: 10861 [2022-11-16 11:26:15,668 INFO L226 Difference]: Without dead ends: 10861 [2022-11-16 11:26:15,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=490, Invalid=1672, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:26:15,669 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 930 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:15,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 284 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-11-16 11:26:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10861 states. [2022-11-16 11:26:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10861 to 8695. [2022-11-16 11:26:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8695 states, 8673 states have (on average 4.520927014873746) internal successors, (39210), 8694 states have internal predecessors, (39210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8695 states to 8695 states and 39210 transitions. [2022-11-16 11:26:15,966 INFO L78 Accepts]: Start accepts. Automaton has 8695 states and 39210 transitions. Word has length 18 [2022-11-16 11:26:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:15,966 INFO L495 AbstractCegarLoop]: Abstraction has 8695 states and 39210 transitions. [2022-11-16 11:26:15,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 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 11:26:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8695 states and 39210 transitions. [2022-11-16 11:26:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:15,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:15,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:15,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:16,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:16,170 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash -358948811, now seen corresponding path program 1 times [2022-11-16 11:26:16,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:16,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34764110] [2022-11-16 11:26:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:16,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:16,172 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:16,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-16 11:26:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:16,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:26:16,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:16,718 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:26:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:17,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:20,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:20,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34764110] [2022-11-16 11:26:20,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34764110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:20,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:26:20,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 11:26:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341069804] [2022-11-16 11:26:20,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:20,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:26:20,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:26:20,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:26:20,395 INFO L87 Difference]: Start difference. First operand 8695 states and 39210 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:25,443 INFO L93 Difference]: Finished difference Result 12411 states and 55438 transitions. [2022-11-16 11:26:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:26:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:25,489 INFO L225 Difference]: With dead ends: 12411 [2022-11-16 11:26:25,490 INFO L226 Difference]: Without dead ends: 12411 [2022-11-16 11:26:25,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:26:25,490 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:25,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 31 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 198 Unchecked, 4.2s Time] [2022-11-16 11:26:25,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12411 states. [2022-11-16 11:26:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12411 to 9808. [2022-11-16 11:26:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 9786 states have (on average 4.609033312895974) internal successors, (45104), 9807 states have internal predecessors, (45104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 45104 transitions. [2022-11-16 11:26:25,854 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 45104 transitions. Word has length 19 [2022-11-16 11:26:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:25,855 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 45104 transitions. [2022-11-16 11:26:25,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 45104 transitions. [2022-11-16 11:26:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:25,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:25,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:25,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Ended with exit code 0 [2022-11-16 11:26:26,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:26,059 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -358292231, now seen corresponding path program 2 times [2022-11-16 11:26:26,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:26,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957108114] [2022-11-16 11:26:26,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:26,060 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 11:26:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:26,061 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:26,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-16 11:26:26,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:26:26,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:26,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:26:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:26,684 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:26:26,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:26:26,930 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:26:26,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:26:27,040 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:26:27,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:26:27,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:26:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:26:27,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:27,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:27,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957108114] [2022-11-16 11:26:27,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957108114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:27,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:27,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:26:27,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075405327] [2022-11-16 11:26:27,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:26:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:26:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:26:27,612 INFO L87 Difference]: Start difference. First operand 9808 states and 45104 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:27,943 INFO L93 Difference]: Finished difference Result 9805 states and 45081 transitions. [2022-11-16 11:26:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:26:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:27,977 INFO L225 Difference]: With dead ends: 9805 [2022-11-16 11:26:27,977 INFO L226 Difference]: Without dead ends: 9805 [2022-11-16 11:26:27,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:27,977 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:27,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-16 11:26:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2022-11-16 11:26:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9805. [2022-11-16 11:26:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9805 states, 9783 states have (on average 4.608095676172953) internal successors, (45081), 9804 states have internal predecessors, (45081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:28,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9805 states to 9805 states and 45081 transitions. [2022-11-16 11:26:28,302 INFO L78 Accepts]: Start accepts. Automaton has 9805 states and 45081 transitions. Word has length 19 [2022-11-16 11:26:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:28,302 INFO L495 AbstractCegarLoop]: Abstraction has 9805 states and 45081 transitions. [2022-11-16 11:26:28,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 9805 states and 45081 transitions. [2022-11-16 11:26:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:28,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:28,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:28,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:28,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:28,505 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:28,506 INFO L85 PathProgramCache]: Analyzing trace with hash -399822218, now seen corresponding path program 1 times [2022-11-16 11:26:28,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:28,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168149518] [2022-11-16 11:26:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:28,507 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 11:26:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:28,508 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:28,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-16 11:26:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:29,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:26:29,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:29,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:26:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:29,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:31,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:31,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168149518] [2022-11-16 11:26:31,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168149518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:31,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:26:31,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:26:31,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768900821] [2022-11-16 11:26:31,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:31,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:26:31,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:31,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:26:31,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:26:31,445 INFO L87 Difference]: Start difference. First operand 9805 states and 45081 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:32,416 INFO L93 Difference]: Finished difference Result 13389 states and 62721 transitions. [2022-11-16 11:26:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:26:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:32,477 INFO L225 Difference]: With dead ends: 13389 [2022-11-16 11:26:32,477 INFO L226 Difference]: Without dead ends: 13389 [2022-11-16 11:26:32,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:26:32,478 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:32,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 173 Unchecked, 0.4s Time] [2022-11-16 11:26:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13389 states. [2022-11-16 11:26:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13389 to 11884. [2022-11-16 11:26:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11884 states, 11862 states have (on average 4.726437363007925) internal successors, (56065), 11883 states have internal predecessors, (56065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11884 states to 11884 states and 56065 transitions. [2022-11-16 11:26:32,885 INFO L78 Accepts]: Start accepts. Automaton has 11884 states and 56065 transitions. Word has length 19 [2022-11-16 11:26:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:32,886 INFO L495 AbstractCegarLoop]: Abstraction has 11884 states and 56065 transitions. [2022-11-16 11:26:32,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 11884 states and 56065 transitions. [2022-11-16 11:26:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:32,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:32,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:32,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Ended with exit code 0 [2022-11-16 11:26:33,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:33,091 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash -399884528, now seen corresponding path program 2 times [2022-11-16 11:26:33,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:33,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180768505] [2022-11-16 11:26:33,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:33,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:33,094 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:33,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-16 11:26:33,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:26:33,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:26:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:33,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:26:33,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:26:34,030 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:26:34,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:26:34,184 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:26:34,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:26:34,220 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:26:34,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:26:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:26:34,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:34,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:34,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180768505] [2022-11-16 11:26:34,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180768505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:34,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:34,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:26:34,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205119922] [2022-11-16 11:26:34,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:34,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:26:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:26:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:26:34,730 INFO L87 Difference]: Start difference. First operand 11884 states and 56065 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:34,992 INFO L93 Difference]: Finished difference Result 11848 states and 55616 transitions. [2022-11-16 11:26:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:26:34,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:35,166 INFO L225 Difference]: With dead ends: 11848 [2022-11-16 11:26:35,167 INFO L226 Difference]: Without dead ends: 11848 [2022-11-16 11:26:35,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:35,167 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:35,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-16 11:26:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2022-11-16 11:26:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11037. [2022-11-16 11:26:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11037 states, 11015 states have (on average 4.65828415796641) internal successors, (51311), 11036 states have internal predecessors, (51311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11037 states to 11037 states and 51311 transitions. [2022-11-16 11:26:35,411 INFO L78 Accepts]: Start accepts. Automaton has 11037 states and 51311 transitions. Word has length 19 [2022-11-16 11:26:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:35,411 INFO L495 AbstractCegarLoop]: Abstraction has 11037 states and 51311 transitions. [2022-11-16 11:26:35,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 11037 states and 51311 transitions. [2022-11-16 11:26:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:35,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:35,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:35,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Ended with exit code 0 [2022-11-16 11:26:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:35,615 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1836086953, now seen corresponding path program 1 times [2022-11-16 11:26:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:35,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355491994] [2022-11-16 11:26:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:35,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:35,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:35,617 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:35,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-16 11:26:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:26:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:36,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:26:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:36,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:38,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:38,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355491994] [2022-11-16 11:26:38,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355491994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:38,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:26:38,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:26:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603333219] [2022-11-16 11:26:38,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:38,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:26:38,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:26:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:26:38,454 INFO L87 Difference]: Start difference. First operand 11037 states and 51311 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:40,512 INFO L93 Difference]: Finished difference Result 11691 states and 54287 transitions. [2022-11-16 11:26:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:26:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:40,551 INFO L225 Difference]: With dead ends: 11691 [2022-11-16 11:26:40,552 INFO L226 Difference]: Without dead ends: 11691 [2022-11-16 11:26:40,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:26:40,552 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:40,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 39 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 73 Unchecked, 1.6s Time] [2022-11-16 11:26:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11691 states. [2022-11-16 11:26:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11691 to 11199. [2022-11-16 11:26:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11199 states, 11177 states have (on average 4.671826071396618) internal successors, (52217), 11198 states have internal predecessors, (52217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11199 states to 11199 states and 52217 transitions. [2022-11-16 11:26:40,800 INFO L78 Accepts]: Start accepts. Automaton has 11199 states and 52217 transitions. Word has length 19 [2022-11-16 11:26:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:40,800 INFO L495 AbstractCegarLoop]: Abstraction has 11199 states and 52217 transitions. [2022-11-16 11:26:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 11199 states and 52217 transitions. [2022-11-16 11:26:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:40,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:40,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:40,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-16 11:26:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:41,004 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1836085713, now seen corresponding path program 1 times [2022-11-16 11:26:41,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:41,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412674408] [2022-11-16 11:26:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:41,005 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:41,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:41,006 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:41,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-16 11:26:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:26:41,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:41,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:26:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:42,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:43,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:43,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412674408] [2022-11-16 11:26:43,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412674408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:43,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:26:43,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:26:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178701915] [2022-11-16 11:26:43,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:43,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:26:43,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:26:43,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:26:43,918 INFO L87 Difference]: Start difference. First operand 11199 states and 52217 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:45,677 INFO L93 Difference]: Finished difference Result 12071 states and 55813 transitions. [2022-11-16 11:26:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:26:45,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:45,720 INFO L225 Difference]: With dead ends: 12071 [2022-11-16 11:26:45,720 INFO L226 Difference]: Without dead ends: 12071 [2022-11-16 11:26:45,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:26:45,720 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:45,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 42 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 63 Unchecked, 1.3s Time] [2022-11-16 11:26:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12071 states. [2022-11-16 11:26:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12071 to 11325. [2022-11-16 11:26:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11303 states have (on average 4.677961603114217) internal successors, (52875), 11324 states have internal predecessors, (52875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 52875 transitions. [2022-11-16 11:26:45,983 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 52875 transitions. Word has length 19 [2022-11-16 11:26:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:45,983 INFO L495 AbstractCegarLoop]: Abstraction has 11325 states and 52875 transitions. [2022-11-16 11:26:45,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 52875 transitions. [2022-11-16 11:26:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:45,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:45,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:46,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:46,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:46,187 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1836023403, now seen corresponding path program 2 times [2022-11-16 11:26:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:46,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725721303] [2022-11-16 11:26:46,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:46,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:46,189 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:46,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-16 11:26:46,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:26:46,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:26:46,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:46,841 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:26:46,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:26:47,076 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:26:47,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:26:47,210 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:26:47,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:26:47,244 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:26:47,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:26:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:26:47,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:47,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:47,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725721303] [2022-11-16 11:26:47,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725721303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:47,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:47,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:26:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673790344] [2022-11-16 11:26:47,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:47,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:26:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:26:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:26:47,754 INFO L87 Difference]: Start difference. First operand 11325 states and 52875 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:48,073 INFO L93 Difference]: Finished difference Result 11313 states and 52727 transitions. [2022-11-16 11:26:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:26:48,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:48,115 INFO L225 Difference]: With dead ends: 11313 [2022-11-16 11:26:48,115 INFO L226 Difference]: Without dead ends: 11313 [2022-11-16 11:26:48,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:48,116 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:48,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 11:26:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2022-11-16 11:26:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11303. [2022-11-16 11:26:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11303 states, 11281 states have (on average 4.669000975090861) internal successors, (52671), 11302 states have internal predecessors, (52671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11303 states to 11303 states and 52671 transitions. [2022-11-16 11:26:48,360 INFO L78 Accepts]: Start accepts. Automaton has 11303 states and 52671 transitions. Word has length 19 [2022-11-16 11:26:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:48,361 INFO L495 AbstractCegarLoop]: Abstraction has 11303 states and 52671 transitions. [2022-11-16 11:26:48,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 11303 states and 52671 transitions. [2022-11-16 11:26:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:48,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:48,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:48,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Ended with exit code 0 [2022-11-16 11:26:48,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:48,564 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1828912003, now seen corresponding path program 2 times [2022-11-16 11:26:48,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:48,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774688533] [2022-11-16 11:26:48,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:48,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:48,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:48,566 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:48,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-16 11:26:48,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:26:48,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:26:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:49,205 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:26:49,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:26:49,438 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:26:49,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:26:49,559 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:26:49,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:26:49,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:26:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:26:50,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:50,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:26:50,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774688533] [2022-11-16 11:26:50,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774688533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:50,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:50,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:26:50,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215321935] [2022-11-16 11:26:50,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:50,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:26:50,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:26:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:26:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:26:50,080 INFO L87 Difference]: Start difference. First operand 11303 states and 52671 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:26:50,435 INFO L93 Difference]: Finished difference Result 11296 states and 52592 transitions. [2022-11-16 11:26:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:26:50,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:26:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:26:50,471 INFO L225 Difference]: With dead ends: 11296 [2022-11-16 11:26:50,471 INFO L226 Difference]: Without dead ends: 11296 [2022-11-16 11:26:50,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:26:50,472 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:26:50,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-16 11:26:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11296 states. [2022-11-16 11:26:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11296 to 11273. [2022-11-16 11:26:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11251 states have (on average 4.665629721802507) internal successors, (52493), 11272 states have internal predecessors, (52493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 52493 transitions. [2022-11-16 11:26:50,707 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 52493 transitions. Word has length 19 [2022-11-16 11:26:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:26:50,707 INFO L495 AbstractCegarLoop]: Abstraction has 11273 states and 52493 transitions. [2022-11-16 11:26:50,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 52493 transitions. [2022-11-16 11:26:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:26:50,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:26:50,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:50,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:50,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:50,913 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:26:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1014149904, now seen corresponding path program 1 times [2022-11-16 11:26:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:26:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222341595] [2022-11-16 11:26:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:50,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:26:50,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:26:50,916 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:26:50,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-16 11:26:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:51,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:26:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:51,680 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:26:51,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:26:52,014 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:26:52,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:26:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:26:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:08,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222341595] [2022-11-16 11:27:08,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222341595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:08,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:08,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 11:27:08,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506993990] [2022-11-16 11:27:08,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:08,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:27:08,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:08,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:27:08,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=288, Unknown=4, NotChecked=0, Total=380 [2022-11-16 11:27:08,017 INFO L87 Difference]: Start difference. First operand 11273 states and 52493 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:18,800 INFO L93 Difference]: Finished difference Result 22545 states and 109978 transitions. [2022-11-16 11:27:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:27:18,803 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:27:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:18,893 INFO L225 Difference]: With dead ends: 22545 [2022-11-16 11:27:18,893 INFO L226 Difference]: Without dead ends: 22545 [2022-11-16 11:27:18,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=213, Invalid=713, Unknown=4, NotChecked=0, Total=930 [2022-11-16 11:27:18,894 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 153 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:18,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 148 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 306 Invalid, 0 Unknown, 372 Unchecked, 5.1s Time] [2022-11-16 11:27:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22545 states. [2022-11-16 11:27:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22545 to 16782. [2022-11-16 11:27:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16782 states, 16760 states have (on average 4.924880668257757) internal successors, (82541), 16781 states have internal predecessors, (82541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16782 states to 16782 states and 82541 transitions. [2022-11-16 11:27:19,619 INFO L78 Accepts]: Start accepts. Automaton has 16782 states and 82541 transitions. Word has length 19 [2022-11-16 11:27:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:19,619 INFO L495 AbstractCegarLoop]: Abstraction has 16782 states and 82541 transitions. [2022-11-16 11:27:19,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 16782 states and 82541 transitions. [2022-11-16 11:27:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:27:19,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:19,625 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:19,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:19,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:19,840 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:27:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash 758512552, now seen corresponding path program 8 times [2022-11-16 11:27:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:19,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211189630] [2022-11-16 11:27:19,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:27:19,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:19,842 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:27:19,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-16 11:27:20,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:27:20,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:27:20,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:20,778 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 11:27:20,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 11:27:21,011 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:27:21,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:27:21,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:27:21,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:27:21,304 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:27:21,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:27:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:21,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:24,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211189630] [2022-11-16 11:27:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211189630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:24,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:24,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:27:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490287225] [2022-11-16 11:27:24,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:24,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:27:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:27:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:27:24,698 INFO L87 Difference]: Start difference. First operand 16782 states and 82541 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:30,435 INFO L93 Difference]: Finished difference Result 21210 states and 96248 transitions. [2022-11-16 11:27:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:27:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:27:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:30,520 INFO L225 Difference]: With dead ends: 21210 [2022-11-16 11:27:30,520 INFO L226 Difference]: Without dead ends: 21210 [2022-11-16 11:27:30,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:27:30,521 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 221 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:30,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 147 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 998 Invalid, 0 Unknown, 246 Unchecked, 5.2s Time] [2022-11-16 11:27:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21210 states. [2022-11-16 11:27:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21210 to 17884. [2022-11-16 11:27:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17884 states, 17862 states have (on average 4.839099764863957) internal successors, (86436), 17883 states have internal predecessors, (86436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17884 states to 17884 states and 86436 transitions. [2022-11-16 11:27:31,182 INFO L78 Accepts]: Start accepts. Automaton has 17884 states and 86436 transitions. Word has length 19 [2022-11-16 11:27:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:31,183 INFO L495 AbstractCegarLoop]: Abstraction has 17884 states and 86436 transitions. [2022-11-16 11:27:31,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17884 states and 86436 transitions. [2022-11-16 11:27:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:27:31,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:31,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:31,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-11-16 11:27:31,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:31,388 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:27:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1777689207, now seen corresponding path program 1 times [2022-11-16 11:27:31,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:31,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048648573] [2022-11-16 11:27:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:31,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:31,390 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:27:31,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-16 11:27:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:27:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:31,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:27:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:33,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:35,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:35,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048648573] [2022-11-16 11:27:35,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048648573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:35,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:35,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-16 11:27:35,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956249644] [2022-11-16 11:27:35,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:35,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:27:35,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:27:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:27:35,917 INFO L87 Difference]: Start difference. First operand 17884 states and 86436 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:40,025 INFO L93 Difference]: Finished difference Result 23779 states and 116112 transitions. [2022-11-16 11:27:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:27:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:27:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:40,121 INFO L225 Difference]: With dead ends: 23779 [2022-11-16 11:27:40,122 INFO L226 Difference]: Without dead ends: 23779 [2022-11-16 11:27:40,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:27:40,122 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:40,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 290 Unchecked, 3.1s Time] [2022-11-16 11:27:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23779 states. [2022-11-16 11:27:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23779 to 19573. [2022-11-16 11:27:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19573 states, 19551 states have (on average 4.958979080353946) internal successors, (96953), 19572 states have internal predecessors, (96953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19573 states to 19573 states and 96953 transitions. [2022-11-16 11:27:40,826 INFO L78 Accepts]: Start accepts. Automaton has 19573 states and 96953 transitions. Word has length 20 [2022-11-16 11:27:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:40,826 INFO L495 AbstractCegarLoop]: Abstraction has 19573 states and 96953 transitions. [2022-11-16 11:27:40,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 19573 states and 96953 transitions. [2022-11-16 11:27:40,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:27:40,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:40,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:40,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Ended with exit code 0 [2022-11-16 11:27:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:41,032 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:27:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1772297997, now seen corresponding path program 2 times [2022-11-16 11:27:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:41,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435262836] [2022-11-16 11:27:41,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:27:41,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:41,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:41,034 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:27:41,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-16 11:27:41,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:27:41,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:41,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:27:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:41,677 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:27:41,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:27:41,917 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:27:41,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:27:42,209 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:27:42,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:27:42,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:27:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:27:42,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:27:42,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:42,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435262836] [2022-11-16 11:27:42,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435262836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:27:42,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:27:42,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:27:42,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426073315] [2022-11-16 11:27:42,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:27:42,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:27:42,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:42,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:27:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:27:42,767 INFO L87 Difference]: Start difference. First operand 19573 states and 96953 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:43,227 INFO L93 Difference]: Finished difference Result 19565 states and 96862 transitions. [2022-11-16 11:27:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:27:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:27:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:43,307 INFO L225 Difference]: With dead ends: 19565 [2022-11-16 11:27:43,308 INFO L226 Difference]: Without dead ends: 19565 [2022-11-16 11:27:43,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:27:43,308 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:43,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-16 11:27:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19565 states. [2022-11-16 11:27:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19565 to 19565. [2022-11-16 11:27:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19565 states, 19543 states have (on average 4.956352658240802) internal successors, (96862), 19564 states have internal predecessors, (96862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19565 states to 19565 states and 96862 transitions. [2022-11-16 11:27:44,131 INFO L78 Accepts]: Start accepts. Automaton has 19565 states and 96862 transitions. Word has length 20 [2022-11-16 11:27:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:44,132 INFO L495 AbstractCegarLoop]: Abstraction has 19565 states and 96862 transitions. [2022-11-16 11:27:44,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19565 states and 96862 transitions. [2022-11-16 11:27:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:27:44,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:44,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:44,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:44,352 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:27:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash 490285092, now seen corresponding path program 1 times [2022-11-16 11:27:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:44,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061795194] [2022-11-16 11:27:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:44,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:44,355 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:27:44,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-16 11:27:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:44,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:27:44,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:44,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:27:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:45,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:27:47,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:47,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061795194] [2022-11-16 11:27:47,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061795194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:47,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:47,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 11:27:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307271590] [2022-11-16 11:27:47,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:47,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:27:47,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:27:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:27:47,513 INFO L87 Difference]: Start difference. First operand 19565 states and 96862 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:49,087 INFO L93 Difference]: Finished difference Result 24294 states and 121736 transitions. [2022-11-16 11:27:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:27:49,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:27:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:49,193 INFO L225 Difference]: With dead ends: 24294 [2022-11-16 11:27:49,193 INFO L226 Difference]: Without dead ends: 24294 [2022-11-16 11:27:49,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:27:49,194 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:49,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 58 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 232 Unchecked, 1.0s Time] [2022-11-16 11:27:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24294 states. [2022-11-16 11:27:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24294 to 22402. [2022-11-16 11:27:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22402 states, 22380 states have (on average 5.029222520107239) internal successors, (112554), 22401 states have internal predecessors, (112554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22402 states to 22402 states and 112554 transitions. [2022-11-16 11:27:50,084 INFO L78 Accepts]: Start accepts. Automaton has 22402 states and 112554 transitions. Word has length 20 [2022-11-16 11:27:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:50,084 INFO L495 AbstractCegarLoop]: Abstraction has 22402 states and 112554 transitions. [2022-11-16 11:27:50,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 22402 states and 112554 transitions. [2022-11-16 11:27:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:27:50,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:50,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:50,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:50,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:50,290 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:27:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:50,291 INFO L85 PathProgramCache]: Analyzing trace with hash -401581742, now seen corresponding path program 2 times [2022-11-16 11:27:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:50,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709331283] [2022-11-16 11:27:50,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:27:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:50,292 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:27:50,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-16 11:27:50,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:27:50,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:27:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:51,010 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:27:51,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:27:51,252 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:27:51,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:27:51,419 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:27:51,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:27:51,450 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:27:51,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:27:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:27:52,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:27:52,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:52,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709331283] [2022-11-16 11:27:52,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709331283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:27:52,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:27:52,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:27:52,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390795538] [2022-11-16 11:27:52,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:27:52,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:27:52,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:27:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:27:52,140 INFO L87 Difference]: Start difference. First operand 22402 states and 112554 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:52,482 INFO L93 Difference]: Finished difference Result 22362 states and 111636 transitions. [2022-11-16 11:27:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:27:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:27:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:52,579 INFO L225 Difference]: With dead ends: 22362 [2022-11-16 11:27:52,580 INFO L226 Difference]: Without dead ends: 22362 [2022-11-16 11:27:52,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:27:52,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:52,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-16 11:27:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22362 states. [2022-11-16 11:27:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22362 to 21332. [2022-11-16 11:27:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21332 states, 21310 states have (on average 4.943359924917879) internal successors, (105343), 21331 states have internal predecessors, (105343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21332 states to 21332 states and 105343 transitions. [2022-11-16 11:27:53,453 INFO L78 Accepts]: Start accepts. Automaton has 21332 states and 105343 transitions. Word has length 20 [2022-11-16 11:27:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:53,453 INFO L495 AbstractCegarLoop]: Abstraction has 21332 states and 105343 transitions. [2022-11-16 11:27:53,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 21332 states and 105343 transitions. [2022-11-16 11:27:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:27:53,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:53,463 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:53,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:53,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:53,677 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:27:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:53,677 INFO L85 PathProgramCache]: Analyzing trace with hash 485097963, now seen corresponding path program 1 times [2022-11-16 11:27:53,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:27:53,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457312323] [2022-11-16 11:27:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:53,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:27:53,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:27:53,679 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:27:53,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-16 11:27:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:54,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:27:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:54,641 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:27:54,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:27:54,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:27:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:27:55,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:27:56,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:27:56,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457312323] [2022-11-16 11:27:56,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457312323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:56,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:27:56,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-11-16 11:27:56,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827556637] [2022-11-16 11:27:56,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:56,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:27:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:27:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:27:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:27:56,307 INFO L87 Difference]: Start difference. First operand 21332 states and 105343 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:27:59,119 INFO L93 Difference]: Finished difference Result 21199 states and 103916 transitions. [2022-11-16 11:27:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:27:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:27:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:27:59,204 INFO L225 Difference]: With dead ends: 21199 [2022-11-16 11:27:59,204 INFO L226 Difference]: Without dead ends: 21199 [2022-11-16 11:27:59,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:27:59,204 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 131 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:27:59,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 70 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 362 Invalid, 0 Unknown, 587 Unchecked, 2.2s Time] [2022-11-16 11:27:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21199 states. [2022-11-16 11:27:59,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21199 to 20477. [2022-11-16 11:27:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20477 states, 20455 states have (on average 4.972182840381325) internal successors, (101706), 20476 states have internal predecessors, (101706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20477 states to 20477 states and 101706 transitions. [2022-11-16 11:27:59,888 INFO L78 Accepts]: Start accepts. Automaton has 20477 states and 101706 transitions. Word has length 20 [2022-11-16 11:27:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:27:59,889 INFO L495 AbstractCegarLoop]: Abstraction has 20477 states and 101706 transitions. [2022-11-16 11:27:59,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:27:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20477 states and 101706 transitions. [2022-11-16 11:27:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:27:59,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:27:59,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:27:59,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-16 11:28:00,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:00,093 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:00,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1319450271, now seen corresponding path program 2 times [2022-11-16 11:28:00,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:00,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792460736] [2022-11-16 11:28:00,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:28:00,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:00,096 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:00,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-16 11:28:00,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:28:00,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:28:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:00,765 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:00,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:01,017 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:28:01,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:28:01,156 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:28:01,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:28:01,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:28:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:28:01,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:01,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:01,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792460736] [2022-11-16 11:28:01,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792460736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:01,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:01,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:01,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946917547] [2022-11-16 11:28:01,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:01,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:01,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:01,700 INFO L87 Difference]: Start difference. First operand 20477 states and 101706 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:02,279 INFO L93 Difference]: Finished difference Result 20426 states and 101510 transitions. [2022-11-16 11:28:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:28:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:28:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:02,367 INFO L225 Difference]: With dead ends: 20426 [2022-11-16 11:28:02,367 INFO L226 Difference]: Without dead ends: 20426 [2022-11-16 11:28:02,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:02,368 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:02,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-11-16 11:28:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2022-11-16 11:28:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 20426. [2022-11-16 11:28:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20426 states, 20404 states have (on average 4.975004900999804) internal successors, (101510), 20425 states have internal predecessors, (101510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20426 states to 20426 states and 101510 transitions. [2022-11-16 11:28:03,158 INFO L78 Accepts]: Start accepts. Automaton has 20426 states and 101510 transitions. Word has length 20 [2022-11-16 11:28:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:03,158 INFO L495 AbstractCegarLoop]: Abstraction has 20426 states and 101510 transitions. [2022-11-16 11:28:03,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 20426 states and 101510 transitions. [2022-11-16 11:28:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:28:03,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:03,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:03,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:03,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:03,365 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1011247200, now seen corresponding path program 1 times [2022-11-16 11:28:03,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:03,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165359192] [2022-11-16 11:28:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:03,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:03,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:03,367 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:03,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-16 11:28:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:28:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:04,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:04,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:04,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-16 11:28:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:05,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:06,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:06,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165359192] [2022-11-16 11:28:06,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165359192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:06,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:06,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-16 11:28:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310153740] [2022-11-16 11:28:06,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:28:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:28:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:28:06,559 INFO L87 Difference]: Start difference. First operand 20426 states and 101510 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:12,102 INFO L93 Difference]: Finished difference Result 20734 states and 100810 transitions. [2022-11-16 11:28:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:28:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:28:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:12,186 INFO L225 Difference]: With dead ends: 20734 [2022-11-16 11:28:12,186 INFO L226 Difference]: Without dead ends: 20734 [2022-11-16 11:28:12,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:28:12,187 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 155 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:12,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 152 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 750 Invalid, 0 Unknown, 924 Unchecked, 4.4s Time] [2022-11-16 11:28:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20734 states. [2022-11-16 11:28:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20734 to 19739. [2022-11-16 11:28:12,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19739 states, 19717 states have (on average 4.950398133590303) internal successors, (97607), 19738 states have internal predecessors, (97607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19739 states to 19739 states and 97607 transitions. [2022-11-16 11:28:12,906 INFO L78 Accepts]: Start accepts. Automaton has 19739 states and 97607 transitions. Word has length 20 [2022-11-16 11:28:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:12,906 INFO L495 AbstractCegarLoop]: Abstraction has 19739 states and 97607 transitions. [2022-11-16 11:28:12,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 19739 states and 97607 transitions. [2022-11-16 11:28:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:28:12,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:12,911 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-16 11:28:12,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:13,112 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -82277552, now seen corresponding path program 3 times [2022-11-16 11:28:13,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:13,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162531861] [2022-11-16 11:28:13,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:28:13,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:13,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:13,114 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:13,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-16 11:28:13,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:28:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:13,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:28:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:13,991 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:13,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:14,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:28:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:28:14,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 11:28:16,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162531861] [2022-11-16 11:28:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162531861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:16,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:16,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 11:28:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431497427] [2022-11-16 11:28:16,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:16,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:28:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:16,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:28:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:28:16,345 INFO L87 Difference]: Start difference. First operand 19739 states and 97607 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 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 11:28:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:24,222 INFO L93 Difference]: Finished difference Result 22408 states and 109348 transitions. [2022-11-16 11:28:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:28:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 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 20 [2022-11-16 11:28:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:24,317 INFO L225 Difference]: With dead ends: 22408 [2022-11-16 11:28:24,317 INFO L226 Difference]: Without dead ends: 22408 [2022-11-16 11:28:24,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:28:24,318 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 630 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:24,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 141 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-16 11:28:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22408 states. [2022-11-16 11:28:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22408 to 18887. [2022-11-16 11:28:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18887 states, 18865 states have (on average 4.97095149748211) internal successors, (93777), 18886 states have internal predecessors, (93777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18887 states to 18887 states and 93777 transitions. [2022-11-16 11:28:24,990 INFO L78 Accepts]: Start accepts. Automaton has 18887 states and 93777 transitions. Word has length 20 [2022-11-16 11:28:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:24,990 INFO L495 AbstractCegarLoop]: Abstraction has 18887 states and 93777 transitions. [2022-11-16 11:28:24,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 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 11:28:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 18887 states and 93777 transitions. [2022-11-16 11:28:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:28:24,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:24,996 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:25,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:25,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:25,211 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash 869992507, now seen corresponding path program 1 times [2022-11-16 11:28:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:25,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727946705] [2022-11-16 11:28:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:25,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:25,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:25,213 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:25,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-16 11:28:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:25,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:28:25,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:26,080 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:26,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:26,315 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 24 treesize of output 18 [2022-11-16 11:28:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:27,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:29,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:29,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727946705] [2022-11-16 11:28:29,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727946705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:29,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:29,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-16 11:28:29,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239134851] [2022-11-16 11:28:29,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:29,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:28:29,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:28:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:28:29,966 INFO L87 Difference]: Start difference. First operand 18887 states and 93777 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:37,021 INFO L93 Difference]: Finished difference Result 19834 states and 96622 transitions. [2022-11-16 11:28:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:28:37,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:28:37,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:37,102 INFO L225 Difference]: With dead ends: 19834 [2022-11-16 11:28:37,103 INFO L226 Difference]: Without dead ends: 19834 [2022-11-16 11:28:37,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:28:37,103 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 177 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:37,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 131 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 884 Invalid, 0 Unknown, 294 Unchecked, 5.3s Time] [2022-11-16 11:28:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19834 states. [2022-11-16 11:28:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19834 to 19249. [2022-11-16 11:28:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19249 states, 19227 states have (on average 4.943048837572164) internal successors, (95040), 19248 states have internal predecessors, (95040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19249 states to 19249 states and 95040 transitions. [2022-11-16 11:28:37,765 INFO L78 Accepts]: Start accepts. Automaton has 19249 states and 95040 transitions. Word has length 21 [2022-11-16 11:28:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:37,765 INFO L495 AbstractCegarLoop]: Abstraction has 19249 states and 95040 transitions. [2022-11-16 11:28:37,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 19249 states and 95040 transitions. [2022-11-16 11:28:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:28:37,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:37,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:37,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-16 11:28:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:37,971 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1493403243, now seen corresponding path program 1 times [2022-11-16 11:28:37,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:37,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704065562] [2022-11-16 11:28:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:37,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:37,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:37,973 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:37,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-16 11:28:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:28:38,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:38,788 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:39,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-11-16 11:28:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:40,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:42,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:42,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704065562] [2022-11-16 11:28:42,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704065562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:42,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:42,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-16 11:28:42,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588668215] [2022-11-16 11:28:42,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:42,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:28:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:42,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:28:42,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:28:42,491 INFO L87 Difference]: Start difference. First operand 19249 states and 95040 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:46,472 INFO L93 Difference]: Finished difference Result 19339 states and 95292 transitions. [2022-11-16 11:28:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:28:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:28:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:46,554 INFO L225 Difference]: With dead ends: 19339 [2022-11-16 11:28:46,554 INFO L226 Difference]: Without dead ends: 19339 [2022-11-16 11:28:46,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:28:46,555 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:46,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 226 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 429 Invalid, 0 Unknown, 52 Unchecked, 3.2s Time] [2022-11-16 11:28:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19339 states. [2022-11-16 11:28:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19339 to 19321. [2022-11-16 11:28:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19321 states, 19299 states have (on average 4.935074356184258) internal successors, (95242), 19320 states have internal predecessors, (95242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19321 states to 19321 states and 95242 transitions. [2022-11-16 11:28:47,264 INFO L78 Accepts]: Start accepts. Automaton has 19321 states and 95242 transitions. Word has length 21 [2022-11-16 11:28:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:47,264 INFO L495 AbstractCegarLoop]: Abstraction has 19321 states and 95242 transitions. [2022-11-16 11:28:47,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19321 states and 95242 transitions. [2022-11-16 11:28:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:28:47,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:47,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:47,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:47,470 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash 401618113, now seen corresponding path program 2 times [2022-11-16 11:28:47,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:47,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916107455] [2022-11-16 11:28:47,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:28:47,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:47,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:47,472 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:47,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-16 11:28:47,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:28:47,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:28:47,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:48,218 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:48,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:48,476 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:28:48,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:28:48,622 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:28:48,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:28:48,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:28:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:28:49,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:49,198 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916107455] [2022-11-16 11:28:49,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916107455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:49,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:49,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:49,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539792978] [2022-11-16 11:28:49,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:49,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:49,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:49,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:49,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:49,200 INFO L87 Difference]: Start difference. First operand 19321 states and 95242 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:49,555 INFO L93 Difference]: Finished difference Result 19121 states and 94056 transitions. [2022-11-16 11:28:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:28:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:28:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:49,636 INFO L225 Difference]: With dead ends: 19121 [2022-11-16 11:28:49,636 INFO L226 Difference]: Without dead ends: 19121 [2022-11-16 11:28:49,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:49,637 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:49,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-16 11:28:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19121 states. [2022-11-16 11:28:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19121 to 19045. [2022-11-16 11:28:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19045 states, 19023 states have (on average 4.920674972401829) internal successors, (93606), 19044 states have internal predecessors, (93606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19045 states to 19045 states and 93606 transitions. [2022-11-16 11:28:50,353 INFO L78 Accepts]: Start accepts. Automaton has 19045 states and 93606 transitions. Word has length 21 [2022-11-16 11:28:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:50,354 INFO L495 AbstractCegarLoop]: Abstraction has 19045 states and 93606 transitions. [2022-11-16 11:28:50,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19045 states and 93606 transitions. [2022-11-16 11:28:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:28:50,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:50,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:50,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:50,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:50,560 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:50,561 INFO L85 PathProgramCache]: Analyzing trace with hash 377606567, now seen corresponding path program 2 times [2022-11-16 11:28:50,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:50,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994712328] [2022-11-16 11:28:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:28:50,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:50,563 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:50,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-16 11:28:51,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:28:51,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:28:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:28:51,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:51,397 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:51,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:51,493 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 11:28:51,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:28:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:28:51,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:51,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994712328] [2022-11-16 11:28:51,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994712328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:51,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:51,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251378975] [2022-11-16 11:28:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:28:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:28:51,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:28:51,942 INFO L87 Difference]: Start difference. First operand 19045 states and 93606 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:28:52,310 INFO L93 Difference]: Finished difference Result 19155 states and 93930 transitions. [2022-11-16 11:28:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:28:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:28:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:28:52,388 INFO L225 Difference]: With dead ends: 19155 [2022-11-16 11:28:52,388 INFO L226 Difference]: Without dead ends: 19155 [2022-11-16 11:28:52,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:52,389 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:28:52,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-16 11:28:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19155 states. [2022-11-16 11:28:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19155 to 19147. [2022-11-16 11:28:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19147 states, 19125 states have (on average 4.909908496732026) internal successors, (93902), 19146 states have internal predecessors, (93902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19147 states to 19147 states and 93902 transitions. [2022-11-16 11:28:53,000 INFO L78 Accepts]: Start accepts. Automaton has 19147 states and 93902 transitions. Word has length 21 [2022-11-16 11:28:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:28:53,000 INFO L495 AbstractCegarLoop]: Abstraction has 19147 states and 93902 transitions. [2022-11-16 11:28:53,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 19147 states and 93902 transitions. [2022-11-16 11:28:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:28:53,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:28:53,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:53,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:53,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:53,206 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:28:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1025380828, now seen corresponding path program 1 times [2022-11-16 11:28:53,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:28:53,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090587011] [2022-11-16 11:28:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:53,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:28:53,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:28:53,208 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:28:53,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-16 11:28:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:28:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:54,086 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:28:54,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:28:54,324 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 20 treesize of output 14 [2022-11-16 11:28:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:55,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:28:58,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:28:58,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090587011] [2022-11-16 11:28:58,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090587011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:58,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:58,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 11:28:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272596171] [2022-11-16 11:28:58,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:58,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:28:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:28:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:28:58,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:28:58,704 INFO L87 Difference]: Start difference. First operand 19147 states and 93902 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:06,964 INFO L93 Difference]: Finished difference Result 20387 states and 98377 transitions. [2022-11-16 11:29:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:29:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:29:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:07,048 INFO L225 Difference]: With dead ends: 20387 [2022-11-16 11:29:07,048 INFO L226 Difference]: Without dead ends: 20387 [2022-11-16 11:29:07,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:29:07,049 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:07,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 200 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 721 Invalid, 0 Unknown, 43 Unchecked, 5.7s Time] [2022-11-16 11:29:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20387 states. [2022-11-16 11:29:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20387 to 19713. [2022-11-16 11:29:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19691 states have (on average 4.887512061347824) internal successors, (96240), 19712 states have internal predecessors, (96240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 96240 transitions. [2022-11-16 11:29:07,697 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 96240 transitions. Word has length 21 [2022-11-16 11:29:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:07,697 INFO L495 AbstractCegarLoop]: Abstraction has 19713 states and 96240 transitions. [2022-11-16 11:29:07,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 96240 transitions. [2022-11-16 11:29:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:29:07,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:07,704 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:07,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-16 11:29:07,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:07,904 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:29:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:07,905 INFO L85 PathProgramCache]: Analyzing trace with hash -372067739, now seen corresponding path program 9 times [2022-11-16 11:29:07,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:07,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512056317] [2022-11-16 11:29:07,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:29:07,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:07,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:07,906 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:07,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-16 11:29:08,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:29:08,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:29:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:08,882 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:29:08,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:29:09,126 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 11:29:09,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 11:29:09,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:29:09,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:29:09,350 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:29:09,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:29:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 11:29:10,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 11:29:13,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:29:13,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512056317] [2022-11-16 11:29:13,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512056317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:13,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:13,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:29:13,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359851780] [2022-11-16 11:29:13,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:13,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:29:13,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:29:13,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:29:13,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:29:13,443 INFO L87 Difference]: Start difference. First operand 19713 states and 96240 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:15,402 INFO L93 Difference]: Finished difference Result 19847 states and 96762 transitions. [2022-11-16 11:29:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:29:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:29:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:15,481 INFO L225 Difference]: With dead ends: 19847 [2022-11-16 11:29:15,481 INFO L226 Difference]: Without dead ends: 19847 [2022-11-16 11:29:15,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:29:15,481 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:15,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 83 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-11-16 11:29:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19847 states. [2022-11-16 11:29:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19847 to 19819. [2022-11-16 11:29:16,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19819 states, 19797 states have (on average 4.883063090367227) internal successors, (96670), 19818 states have internal predecessors, (96670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19819 states to 19819 states and 96670 transitions. [2022-11-16 11:29:16,130 INFO L78 Accepts]: Start accepts. Automaton has 19819 states and 96670 transitions. Word has length 21 [2022-11-16 11:29:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:16,130 INFO L495 AbstractCegarLoop]: Abstraction has 19819 states and 96670 transitions. [2022-11-16 11:29:16,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 19819 states and 96670 transitions. [2022-11-16 11:29:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:29:16,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:16,136 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:16,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-16 11:29:16,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:16,337 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-16 11:29:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash -429266459, now seen corresponding path program 10 times [2022-11-16 11:29:16,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:29:16,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063329578] [2022-11-16 11:29:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:29:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:29:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:29:16,339 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:29:16,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ca1f796-2761-41e3-82fb-6fbda70e9001/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-16 11:29:17,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:29:17,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:17,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:29:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:17,304 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 11:29:17,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 11:29:17,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:29:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:29:18,517 INFO L328 TraceCheckSpWp]: Computing backward predicates...